JP3590179B2 - Scanner device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a scanner device, and more particularly, to a scanner device for capturing a color original, and more particularly to a scanner device using a two-line color CCD.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in order to read a color image, technical means including two lines (G, R / B lines) and three lines (R, G, B lines) provided with different color filters in a linear sensor are known. However, this technical means has a problem that a color shift problem occurs due to a spatial line shift and a sufficient image quality cannot be obtained.
[0003]
Therefore, in order to correct such a spatial shift between lines, there is known a technical means for eliminating a color shift by performing digital processing such as delaying an image signal obtained from one line.
[0004]
However, such a digital processing technique requires several lines of memory, which has been a factor in increasing the circuit scale and cost.
[0005]
On the other hand, Japanese Patent Application Laid-Open No. 7-25497 discloses a technical means for solving the above problem by incorporating a delay line (buffer) inside the linear sensor.
[0006]
[Problems to be solved by the invention]
However, in the technical means disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 7-25497, that is, in the line sensor of the type having a built-in delay line (buffer) as described above, the sub-scanning direction in which the color misregistration correction processing can be performed is determined. There is a problem that the color misregistration becomes larger in the opposite direction. Therefore, once the scanning is performed to capture the image, the scanning direction is restricted to the scanning start position again. Required.
[0007]
Before the main scan, for example, pre-scan for determining image capturing conditions, for example, gain, gamma amount, CCD integration time, illumination light intensity, illumination light color temperature, etc., preview for confirmation of image data , Etc., these round trip times result in a very inconvenient scanner device.
[0008]
There is also a problem in the case of displaying a thumbnail (also called an index display) in which all frames of a cartridge film requiring high-speed processing are displayed on one screen.
[0009]
The present invention has been made in view of such a problem, and provides a scanner device that can obtain an image without color shift and can capture an image in the shortest time according to the quality of a target image. The purpose is to provide.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present inventionbyThe scanner device is configured to relatively scan the line sensor and the color document in a sub-scanning direction, thereby capturing an image of the color document and capturing image data, and performing the sub-scanning of the line sensor in either a forward direction or a reverse direction. A first image capturing control means for executing the image data in high quality and capturing the image data with high image quality; and a second image capturing the image data by performing the sub-scanning of the line sensor in both forward and reverse directions. And capture control means.,
The main scan for capturing a high-quality image is executed by the first image capture controller, and either a pre-scan for preliminary capturing an image, a preview for preliminary capturing an image, or a thumbnail for displaying a plurality of images is performed. It is performed by the second image capture control means..
[0011]
the aboveIn the scanner device, the line sensor is a line sensor with a delay buffer, and when performing image capture by the second image capture control unit, the line sensor is a non-delayed read that reads without delay through the delay buffer. Further, when the first image capturing control means performs image capturing, depending on the size of the captured image, delayed reading is performed by reading through the delay buffer, and non-delayed reading is performed without performing the delay. Switching between reading andIt is characterized by the following.
[0013]
UpNoteThe canner device takes an image of the color original and takes in the image data by making the line sensor and the color original relatively sub-scan by the image data input means. Further, the first image capturing control means executes the sub-scanning of the line sensor in only one of the forward direction and the reverse direction, and captures the image data with high image quality. Further, the second image capture control means captures the image data by executing the sub-scanning of the line sensor in both forward and reverse directions.The main scan for capturing a high-quality image is executed by the first image capture control unit, and is performed by either a pre-scan for preliminary capturing an image, a preview for preliminary capturing an image, or a thumbnail displaying a plurality of images. The determination is performed by the second image capturing control means.
[0014]
UpNoteCanna equipmentThe line sensor in the above is a line sensor with a delay buffer, and when executing image capture by the second image capture control means, performs non-delayed readout without delay via the delay buffer; When executing image capturing by the first image capturing control means, a delayed read operation to be performed with a delay through the delay buffer and a non-delayed read operation without performing the delay are performed depending on the size of the captured image. Switch.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0017]
FIG. 1 is a block circuit diagram showing a configuration of a scanner device according to a first embodiment of the present invention, and shows a state in which a cartridge film adapter is mounted on a scanner main body which is an image capturing unit. FIG. 2 is a perspective view of a main part showing the cartridge film adapter, the film information detecting unit and its peripheral parts in the scanner device of the embodiment.
[0018]
As shown in FIG. 1, this scanner device includes a scanner main body 1 as an image capturing side device, and a mounting portion for a cartridge film adapter 2 is formed in the middle of the scanner main body 1. After the cartridge film adapter 2 is mounted on the mounting portion, a predetermined image of the cartridge film loaded in the cartridge film adapter 2 is taken in. Hereinafter, each component of the scanner main body 1 which is an image capturing unit in the scanner device will be described.
[0019]
First, the illumination means of the scanner main body 1 will be described.
[0020]
As shown in FIG. 1, the scanner device of the present embodiment has illumination means for illuminating a film document. As the illuminating means, an LED, a fluorescent lamp (hot cathode tube, cold cathode tube) or the like can be considered. In the present embodiment, the fluorescent lamp 41 is used to adjust the top and bottom directions of the film (in the figure, the direction from the front surface to the back surface of the paper). Illumination is linear and uniform.
[0021]
The fluorescent lamp 41 is driven by an illumination driving means 4, for example, an inverter circuit, at an inverter drive speed of about 100 kHz, and is driven at a cycle sufficiently shorter than a CCD integration time described later. The illumination driving means 4 is controlled by the scanner main body control means 38.
[0022]
Note that the fluorescent lamp 41 is connected by lead wires by caulking because the electrode portion of the fluorescent lamp 41 becomes extremely hot and the soldered wiring is peeled off by a slight stress.
[0023]
Next, the sub-scanning drive system in the scanner main body 1 will be described.
[0024]
The scanner device of the present embodiment includes a stepping motor 6 which is a driving force source for sub-scanning of a film or a document, and drives a carriage 8 described later by the stepping motor 6 to sub-scan the film or the document. ing. The stepping motor 6 is driven by the stepping motor driving means 5 controlled by the scanner main body control means 38, and is provided with a gear 10 which meshes with a pinion gear 11 of the stepping motor 6, and a feed screw which rotates integrally with the gear 10. 9 to the carriage 8.
[0025]
A line CCD 7, an imaging lens optical system 28, and a fluorescent lamp 41 are coaxially fixed to the carriage 8 in order from the rear (right side in the figure) of the scanner main body 1. Scanning (sub-scanning) of the carriage 8 and line An electrical output of one image is obtained by scanning (main scanning) of the CCD 7. A mounting portion for the cartridge film adapter 2 is formed between the fluorescent lamp 41 and the taking lens optical system 28.
[0026]
Further, the carriage 8 is screwed to the feed screw 9 at a rear portion, and the feed screw 9 is connected to the stepping motor 6 via the gear 10 and the pinion gear 11 of the stepping motor 6 as described above. .
[0027]
Further, the carriage 8 is connected to a slide bar 42 fixed to the scanner main body 1 at a front part (left side in the figure), and can move in the left-right direction (vertical direction in the figure) of the scanner main body 1. ing.
[0028]
As described above, the sub-scanning drive in the step corresponding to the rotation amount (step drive) of the stepping motor 6 is performed. Note that the minimum unit step of the stepping motor 6 is usually determined to be a natural number 1 / the pixel width of the CCD 7 based on the size projected onto the film surface.
[0029]
If the imaging optical system is a zoom optical system as in the scanner device of the present embodiment and the pixel width changes, a unit corresponding to the zoom value can be selected by selecting a unit step having a value as close as possible among the unit steps. Sub-scanning of steps can be performed.
[0030]
The moving amount and the position of the carriage 8 are obtained by counting the driving pulse amount of the stepping motor 6 in synchronization with the output signals of the start photo interrupter 12 and the end photo interrupter 15. The details will be described later.
[0031]
The relative position with respect to the imaging screen can be calculated based on the adjustment value written in the EEPROM (not shown) and the drive pulse amount, and a predetermined image can be captured.
[0032]
A start photo interrupter 12 and an end photo interrupter 15 are disposed on both sides of the rear end of the carriage 8. Light blocking members 13 and 14 corresponding to the photo interrupters 12 and 15 are provided on both sides of the rear end of the carriage 8 so as to protrude therefrom. The scanning start position and the end position of the carriage 8 are determined by the photo interrupter 12. , 15. That is, it is possible to detect whether the photo interrupters 12, 15 are in the light shielding state by the light shielding members 13, 14 or in the non-light shielding state by the movement of the light shielding members 13, 14 accompanying the movement of the carriage 8. .
[0033]
When the photo-interrupters 12 and 15 enter the light-shielding state, further driving of the stepping motor 6 in the current direction is prohibited.
[0034]
Next, the film driving means in the cartridge film adapter 2 mounted on the scanner main body 1 will be described.
[0035]
The film to be fetched is stored in the cartridge film adapter 2 and wound up on a spool 18 by a film drive motor 17 to wind up the film. As a result, a frame to be captured by the scanner main body 1 can be set.
[0036]
The film drive motor 17 is controlled by a film drive means 19 to wind and rewind the film. Here, the driving amount of the film is detected by a finer pulse output from a film perforation detection photoreflector (not shown) and a film driven photointerrupter, and the film driving control is performed based on this. . The film driving means 19 is controlled by a control means 44 provided on the cartridge film adapter 2.
[0037]
In addition, when the cartridge film adapter 2 is mounted on the scanner main body 1, the control means 44 communicates with the scanner main body control means 38 provided in the scanner main body 1, and controls the magnetic information of the cartridge film. It transmits information such as optical information, adapter status information, adjustment value information, and receives commands.
[0038]
After the cartridge film adapter 2 is attached to the scanner main body 1 and the frame to be captured is set as described above, the film screen is zoomed by the unique zoom optical system 28 depending on the type of the adapter, and The image is projected on the CCD 7.
[0039]
Further, since the film screen size has a unique relationship with the adapter used, the number of pixels captured in the main scanning direction can be kept substantially the same regardless of the size of the film screen.
[0040]
Next, a description will be given of a zoom drive unit in the scanner main body 1.
[0041]
Zoom driving is performed by driving a zoom motor 30 by a zoom driving unit 29. The set zoom drive amount is given by a pulse output when the light shielding plate 35 shields / non-shields the photo interrupter 32 by the rotation of the photo interrupter gear in conjunction with the zoom motor 30. The zoom value is determined by the pulse amount of the photo interrupter 32 synchronized with the output signals of the start photo interrupter 33 and the end photo interrupter 34. The zoom value can be calculated based on an adjustment value written in an EEPROM (not shown) and the drive pulse amount.
[0042]
Further, with the zoom movement, the focus adjusting unit 45 adjusts the focus to a predetermined position based on the adjustment value written in the EEPROM (not shown), the zoom value, and the value based on the information of the attached adapter. ing. The focus adjustment drive is performed by driving a focus adjustment motor 46. The set focus adjustment amount is given by a pulse output when the light shielding plate 47 shields / non-shields the photointerrupter 48 by rotating the photointerrupter gear in conjunction with the motor 46.
[0043]
Next, control means (RISC) in the scanner main body 1 will be described.
[0044]
As described above, each circuit in the scanner main body 1 is controlled by the scanner main body control means 38. The scanner main body control means 38 also controls the CCD 7 and the AD conversion means 39, and transfers digital image data obtained through the control to the personal computer connected to the scanner main body 1 via the communication means 37. 36 or the like.
[0045]
The scanner main body control means 38 is constituted by a RISC type microcomputer. Here, RISC is an abbreviation of “Reduced Instruction Set Computer”, and is a computer that can execute one instruction with a clock having an oscillation frequency. On the other hand, a conventional CPU is constituted by a microcomputer of a Complex Instruction Set Computer (CISC) type, and this CISC requires at least four clocks to execute one instruction.
[0046]
Therefore, in the conventional CISC-type CPU, a high-speed and complicated control signal such as a drive control signal for the CCD or a control signal for controlling an interface circuit including an amplifier, a clamp circuit, and an AD converter is transmitted using the port of the CPU. Input / output could not be performed. Furthermore, it has been difficult to perform multi-tasks for output processing of high-speed control signals of various kinds such as motor drive control and CCD control, input processing of data, and arithmetic processing of input data. Therefore, in order to control the CCD, the interface IC, and the motor driver, a dedicated control IC is generally provided, and the CPU is configured to perform the above-described control via the control IC. And the area occupied by them increased, which hindered downsizing and cost reduction of the scanner.
[0047]
In view of the above problems, the scanner device of the present embodiment employs a RISC-type CPU as the CPU, directly assigns the control signal to the input / output port of the CPU, and eliminates the need for the external circuit. The number of components is greatly reduced, the area occupied by each component is reduced, and the scanner is reduced in size and cost is reduced.
[0048]
For the above purpose, the RISC microcomputer of the present embodiment is
(1) Stepping motor control signal,
(2) CCD control signals such as read transfer pulse (ΦROG), shift lock (ΦCLK), and reset pulse (ΦRS)
(3) Control signal for setting the gain of the amplifier that amplifies the CCD output by STOP, LOAD, UP / DOWN, and CK
(4) a control signal for clamping the output level immediately after resetting the CCD output by CMP;
(5) a control signal for sampling and holding the output level by S / H,
(6) a control signal for clamping the black level of the CCD output by BCMP;
(7) AD conversion timing control signal,
(8) Data communication control with a personal computer, etc.
Each of the control signals which occur simultaneously and frequently is generated in a software manner.
[0049]
Next, communication means in the scanner main body 1 will be described.
[0050]
The scanner device of the present embodiment is connected to an external personal computer (PC) or the like by bidirectional communication means, transmits image data captured by the personal computer, receives commands from the personal computer, and receives commands from the personal computer. It is configured to perform a processing operation according to a command request.
[0051]
The connection between the scanner body 1 and the personal computer 36 may be made using a generally known SCSI, PCI bus, ISA bus, or the like. In the present embodiment, a printer port is used as the bidirectional communication means. ing.
[0052]
As a result, bidirectional communication can be performed only by connecting the scanner main body 1 and the personal computer 36 with a printer cable without requiring any special interface board. Can be reduced. In addition, when connecting to a personal computer, it is not necessary to perform setting work for allocating resources (DMA channels, IRQs, etc.) of the personal computer, so that there is an effect that the connection work of the user is very simple.
[0053]
Next, a description will be given of a magnetic / optical information detection / film drive system in the scanner device of the present embodiment.
[0054]
FIG. 2 is a perspective view of a main part showing an electric part of the main part of the cartridge film adapter in the scanner device of the present embodiment.
[0055]
As shown in the figure, a film cartridge 50 is loaded in the cartridge film adapter 2 mounted on the scanner main body 1. A data disk 59 is provided at the bottom of the film cartridge 50. When the film cartridge 50 is loaded into the cartridge film adapter 2, the data disk 59 is located near the data disk 59. A photo-reflector 52 for reading the data is provided.
[0056]
The data on the data disk 59 is obtained by rewinding the film, rotating the data disk 59, and reading the black and white pattern by the photo reflector 52.
[0057]
The data disk 59 records the number of films of a cartridge, negative / positive information, ISO information, and the like.
[0058]
Magnetic tracks are formed on the film of the film cartridge 50, and when the film runs, magnetic information recorded on the film is input to the film cartridge control means 44 through the magnetic reproducing head 55 and the magnetic reproducing circuit 51. It has become so. As the magnetic information, a maker identification code is recorded in a tongue portion (lead portion) of the film, and photographing information of the film (photographing date, aspect ratio, use of strobe, etc.) is recorded for each frame of the film. .
[0059]
Further, the film cartridge control means 44 can write film management information (number of additional prints, caption designation, film cartridge management code, film frame album editing control code, etc.) on the magnetic track via the magnetic writing head 56. I can do it.
[0060]
The reading and writing of the magnetic information are executed based on the timing of a photo reflector 54 for detecting the perforation 58 of the film and a photo interrupter 53 for outputting a finer pulse in response to the driving amount of the film. .
[0061]
Further, the film cartridge control means 44 can read optical information (bar code information, film top and bottom information, film aspect information, etc.) recorded on the film from the phototransistors 60 and 61. The optical information is written with a data pattern and a clock pattern aligned vertically. To read this, the film is illuminated by the LED 64 via the masks 61 and 62. The mask 62 illuminates only the data pattern, and the phototransistor 61 outputs the data pattern. The mask 63 illuminates only the clock pattern, and the phototransistor 61 outputs the clock pattern. Note that the LED 64 is desirably a red monochromatic light in terms of S / N.
[0062]
The film cartridge control means 44 performs H / L reverse decoding of the output signal based on the negative / positive determination of the film, extracts optical information, and transmits the optical information to the scanner body control means 38 of the scanner body 1. Has become.
[0063]
Returning to FIG. 1, an image pickup system in the scanner device of the present embodiment will be described.
[0064]
The illuminated film image is projected on a linear sensor (CCD) 7 by an optical system of an imaging lens 28. The film image is photoelectrically converted by the linear sensor 7 and is converted into an image signal by a subsequent AD converter (consisting of a clamp circuit, an amplifier circuit, a gamma converter circuit, and an AD converter circuit) 39. As described above, these controls are generally controlled by the RISC.
[0065]
As shown in FIG. 3, in the CCD (linear sensor) 7, two line linear sensors of a G line and an R / B line are arranged at an interval 2d corresponding to two lines. It has a built-in delay buffer for two lines for correction, and by controlling the read pulse, it is possible to output the red and blue signals simultaneously imaged with respect to the green signal with a delay of two lines.
[0066]
With such a structure, the problem of color misalignment does not occur when sub-scanning is performed at a resolution such that it moves by the width of the G line and the R / B line of the linear sensor in one scan.
[0067]
However, the color shift problem does not occur when the sub-scanning direction is from the R / B line to the G line, and the CCD integration for each sub-scan in steps corresponding to the interval between the G line and the R / B line. (Here, the direction of sub-scanning refers to the direction of movement of the film image projected on the CCD.) The direction of one sub-scan is opposite to that described above. In a case where the integration of the two CCDs is performed over a sub-scanning movement amount larger than the predetermined amount corresponding to the interval between the two lines, there is a problem that the color shift is accelerated.
[0068]
In order to solve this, the scanner device of the present embodiment is configured so that the sub-scanning direction information and the sub-scanning movement amount information during CCD integration are transferred to a personal computer in advance, and the personal computer performs color misregistration correction.
[0069]
Note that the transfer data for the color shift correction is not limited to the above, and the color shift correction amount itself may be transferred to a personal computer, or may be corrected on the scanner body side.
[0070]
Next, the operation of the two-line CCD will be described with reference to FIG.
[0071]
First, when the ROG panel enters, a gate (not shown) in FIG. 3 opens, and the photocharges accumulated in each pixel of the G-CCD are stored in the G shift gate, and the charges stored in the R / B-CCD are stored in the buffer 1 '. Will be transferred. Subsequently, when the pulses of V1 and V2 are input, the contents of buffer 1 are transferred to buffer 2 'and the contents of buffer 2 are transferred to the R / B shift gate, and then the contents of buffer 1' are transferred to buffer 1 and buffer 2 are transferred. 'Is transferred to the buffer 2.
[0072]
Thereafter, the CK pulse is read out from the shift gate to the Gout and R / Bout terminals for each pixel. By repeating this cycle, the R / B-CCD is read out with a delay of two lines (see C1 in the figure).
[0073]
FIG. 4B shows the timing pulse of the non-delayed readout. The pulses of V1 and V2 are three times as large as those of FIG. 4A, and the R / B-CCD can be read by one read operation. Is transferred to the R / B shift gate (see reference numerals C1 to C3 in the drawing).
[0074]
By driving the CCD (linear sensor) shown in FIG. 3 at this timing, the CCD can be read without delay.
[0075]
As described above, since the timing pulse is controlled by the software of the port of the RISC microcomputer as described above, the read timing pulse is set according to the read conditions (preview, main scan, prescan, thumbnail display mode, etc.). It has the merit that it can be freely changed together.
[0076]
In addition to the image capturing mode, the non-delayed reading is useful as a substitute for the shutter function of a CCD having no shutter function. That is, by repeating the non-delayed reading at a high speed, the CCD can be practically kept in the reset state (no integration state).
[0077]
As a result, the history effect of the CCD overflow can be reduced, and the next CCD integration and reading can be performed quickly. In a normally bright place, the charge in the CCD and the shift gate cannot be swept at one time due to the hysteresis effect, and a plurality of sweeps are required.
[0078]
Since one pixel of the image is composed of N pixels, it can be converted to an image pixel by dividing by N. That is,
Y = (Sp / N) -D1y
Y: Color shift amount (the unit is the number of pixels of the image)
Sp: G line, R / B line separation width (unit is pixel of CCD)
D1y: Delay amount (unit: pixel of CCD)
Sign for forward direction +
Sign in reverse direction-
N: Sub-scanning movement amount during integration (unit is pixel of CCD)
It becomes.
[0079]
FIG. 5 is a diagram showing the degree of color misregistration of the CCD shown in FIG. 4 based on the above-mentioned theoretical expression in the case of delay / no delay, and in the forward and reverse directions of sub-scan, respectively. (Pixel unit) The horizontal axis indicates the sub-scanning movement amount (pixel unit) during CCD integration.
[0080]
As can be seen from FIG.
(1) When there is no delay, if the amount of sub-scanning movement during integration becomes large, it converges to 0 and there is no color shift. On the other hand, if there is a delay, a color shift of two pixels occurs. Absent.
[0081]
(2) In the reverse direction, color shift of up to four pixels occurs when there is a delay, and color shift of up to two pixels occurs when there is no delay.
[0082]
(3) Delay is good only when the amount of sub-scanning movement is 1 pixel in the forward direction and during CCD integration. Other than that, the side effect is large.
[0083]
As described above, when the sub-scanning movement amount during the CCD integration does not exceed 2 pixels and is in the forward direction, reading is performed with a delay, and when the sub-scanning movement amount during the CCD integration exceeds 2 pixels or in the reverse direction. In this case, the color shift can be minimized by performing the reading without delay. Also, of course, high-speed reading can be performed for a long time.
[0084]
Next, a description will be given of the color shift of the two-line CCD.
[0085]
Here, how the color shift occurs when the two-line CCD is read with delay and when the read is performed without delay will be theoretically described.
[0086]
As described above, if the CCD integration is performed for each sub-scan of each pixel of the CCD and the sub-scan direction is the forward direction, the color shift problem does not occur.
[0087]
The problem of color misregistration occurs when the direction of the sub-scan is reversed or when the CCD integration is performed during the sub-scan for a plurality of pixels.
[0088]
Theoretically, the color shift amount y is
y = Sp− (D1y × N) (pixel)
y: color shift amount (unit: pixel of CCD)
Sp: G line, R / B line separation width (unit is pixel of CCD)
D1y: Delay amount (unit: pixel of CCD)
Sign for forward direction +
Sign in reverse direction-
N: Sub-scanning movement amount during integration (unit is pixel of CCD)
Is required.
[0089]
Further, if the reverse direction is prohibited at the highest resolution, it is possible to suppress the color shift within a maximum of one pixel.
[0090]
FIG. 6 is an explanatory view showing a CCD capable of further reducing the color shift.
[0091]
The CCD shown in FIG. 6 is an example of a two-line CCD in which the distance Sp between the G line and the R / B line is set to Sp = 1. According to this, as shown in FIG. 7, unlike the above-described CCD, the maximum color shift amount can be suppressed within one pixel.
[0092]
Further, when the reverse direction is prohibited at the highest resolution, color shift of one pixel or more does not occur at the maximum, so that the color shift correction processing itself can be abolished, and the reading speed can be further improved.
[0093]
Next, the operation of the scanner device of the present embodiment will be described with reference to the flowcharts shown in FIGS.
[0094]
FIGS. 8 to 11 are flowcharts for explaining the operation of the scanner main body according to the present embodiment.
[0095]
FIGS. 12 and 13 are flowcharts for explaining the operation of the monitor display screen of the personal computer connected to the scanner body of the present embodiment.
[0096]
8 and 9 are flowcharts showing a processing routine that is started when the power of the scanner body is turned on.
[0097]
First, when the power of the scanner main body 1 is turned on, the operation is started from step S100. Next, in step S101, the fluorescent lamp 41 (CFL) is turned on. This is because the CFL (cold-cathode tube) employed as the fluorescent lamp 41 of the present embodiment does not have stable light quantity and color for several tens of seconds immediately after lighting, so it is necessary to allow a stabilization time before scanning as much as possible. Because there is. Therefore, when a hot cathode tube is used as the fluorescent lamp 41, the heater may be turned on without lighting.
[0098]
In step S102, the scanner main body control means 38 determines whether or not the cartridge film adapter 2 is mounted on the scanner main body 1. This determination is made by the scanner body control means 38 reading the output of the adapter identification means 43 provided on the cartridge film adapter 2.
[0099]
The adapter identification means 43 may simply detect a bit code based on the presence or absence of an electrical connection between the cartridge film adapter 2 and the scanner main body 1, optically read a bit code based on a difference in reflectance and transmittance, an EEPROM or the like. For example, reading a bit code written in the storage element of (1) is conceivable. Further, analog data such as simple resistance values and voltage values may be used.
[0100]
In this embodiment, simply
00: Adapter not attached
01 ... 135 film adapter (strip film)
10 ... 135 film adapter (piece film)
11 Cartridge film adapter
Are assigned bit codes.
[0101]
By detecting the bit code, the scanner main body control means 38 can determine whether or not the cartridge film adapter 2 is mounted and the type of the mounted adapter.
[0102]
Specifically, the code is stored in the adapter flag ADPTFLG, and the following processing is executed based on the flag.
[0103]
That is, if ADPTFLG is other than (0, 0), the process proceeds to step S103. Here, a command for displaying a warning indicating that the adapter is not attached is transmitted on the monitor screen of the personal computer, and then the process returns to step S102.
[0104]
Here, a dialog box is displayed on the monitor screen of the personal computer to warn that the cartridge film adapter 2 is not attached to the scanner body 1.
[0105]
That is, if ADPTFLG is other than (0, 0), the process proceeds to step S104, where necessary zoom processing and focus processing corresponding to each ADPTFLG are performed.
[0106]
In step S104, the scanner main body control means 38 performs necessary zoom / focus processing corresponding to each ADPTFLG corresponding to the adapter. Here, since the screen size of the 135 film is 24 mm × 36 mm and the screen size of the cartridge film is 17 mm × 30 mm, the set zoom value is substantially inversely proportional to the size of the target screen in the main scanning direction. Is set to a value that That is,
(Zoom value of cartridge film adapter)
= 1.5 x (135 film adapter zoom value)
It has become.
[0107]
In addition, since the zoom movement causes a focus movement, and the screen position differs for each adapter, the zoom movement is performed and the focus adjustment processing is performed every time the adapter is replaced.
[0108]
In step S105, here, the film to be captured is determined by the adapter flag. That is, if ADPTFLG = (0, 1), the process proceeds to step S108 shown in FIG. 9, and if ADPTFLG = (1, 0), the process proceeds to step S107, where ADPTFLG = (1, 1). If there is, the process proceeds to step S106.
[0109]
In step S106, here, the initial settings for the 135 film adapter (strip film) are made, and the system waits for a command from the personal computer.
[0110]
In step S107, here, the initial settings for the 135 film adapter (piece film) are made, and the system waits for a command from the personal computer.
[0111]
Referring to FIG. 9, when the film cartridge 50 is inserted into the cartridge film adapter 2 in step S108, a cartridge presence / absence detection switch (not shown) is turned on, and the scanner main body control means 38 detects this. When the film cartridge 50 cannot be detected, the process proceeds to step S114, and when the film cartridge 50 can be detected, the process proceeds to step S109.
[0112]
In step S109, a rewind process is performed here. Specifically, when the film is coming out of the film cartridge 50 (see FIG. 2), the film is stored in the film cartridge 50. The determination as to whether or not the film has come out of the film cartridge 50 is made based on the current number of film frames stored in an EEPROM (not shown).
[0113]
Next, in step S110, the fluorescent lamp 41 is turned off. That is, when the auto-loading process is performed, the magnetic reproducing process is included in the auto-loading process, and the magnetic reproducing process is very weak against the fluorescent lamp driving noise, so that the fluorescent lamp is turned off.
[0114]
In step S111, an auto load process is performed here. Specifically, first, the film rewinding operation is continued until the information on the data disk 59 (see FIG. 2) is completely read. The data read by the film cartridge control means 44 is transmitted to the scanner body control means 38, stored in a storage means (not shown) in the control means 38, and later transferred to the personal computer 36 through the communication means 37. .
[0115]
After reading the information on the data disk 59 by the film cartridge control means 44, the magnetic information and film optical information recorded in the film leader, for example, film type (negative or positive), maker film ID No. , The film driving means 19 drives the film to the first frame.
[0116]
Here, the data of the data disk 59 read by the film cartridge control means 44 is stored in a storage means (not shown) in the scanner main body control means 38, and later transferred to the personal computer 36 through the communication means 37.
[0117]
The optical information of the film is recorded in a bar code. Hereinafter, this detection operation will be described in detail.
[0118]
In the bar code, a film ID indicating the ID of the film, the total number of frames of the film in the film cartridge 50, and the like are written in a film reader portion. Further, for each frame of the film, a maker code, a film type code, and a film frame No. Is written.
[0119]
Here, the detected combination of (manufacturer code) × (film type code) is transmitted to the personal computer 36, the film type is specified from the film data stored in the personal computer 36, and the gamma conversion corresponding thereto is performed. By changing the amount, illumination condition, CCD integration condition, and color conversion algorithm such as LUT, high-quality image data acquisition is achieved.
[0120]
Since the barcode is written in red color, it can be read out by red LED illumination.
[0121]
As shown in FIG. 2, the red LED and the light receiving element are arranged at positions where the optical information can be read before one frame is set on the film cartridge 50 side of the image capturing area of the scanner body 1. I have.
[0122]
Here, in the scanner device of the present embodiment, the barcode is read as described above, but the barcode reading method is not limited to the above, and for example, the barcode is read by the CCD 7 shown in FIG. Is also good.
[0123]
Next, in step S112, when the magnetic reproduction process is completed, the fluorescent lamp 41 is turned on, the temperature of the tube of the fluorescent lamp 41 is maintained as much as possible, and the light amount and the color stability are maintained.
[0124]
In the case of a hot cathode tube, there is no need to perform lighting control in this way, and the fluorescent lamp may be turned on just before scanning by continuing to turn on the heater.
[0125]
In step S113, a data transfer process to the personal computer 36 is performed. More specifically, the information on the data disk 59 and the magnetic information recorded on the film reader and the film optical information, for example, film type (negative / positive), maker, film ID No. To the personal computer 36.
[0126]
In step S114, it is determined whether the film cartridge 50 has been newly loaded. Here, if the film cartridge 50 has been loaded for the first time, in step S116, the same "auto load process" as described above is performed. If the film cartridge 50 has not been loaded, the process proceeds to step S119.
[0127]
In step S119, the scanner main body control means 38 of the scanner main body 1 detects whether or not a command has been input from the personal computer 36, and if a command has been input, executes a command process corresponding to the command in step S120. I do. If there is no input, the flow shifts to step S114 to enter a loop.
[0128]
FIG. 10 is a flowchart showing a command processing routine of the scanner main unit 1 when a command for transmitting the current position information of the sub-scanning member of the scanner to the personal computer 36 is sent from the personal computer 36. .
[0129]
As shown in FIG. 10, when the communication processing routine of the current position information of the sub-scanning member of the scanner is called in step S200, the scanner main body control means 38 of the scanner main body 1 sends the personal computer 36 in step S201. Then, the current position information of the sub-scanning member (CCD 7) of the scanner is transmitted, and the process returns in step S202.
[0130]
Thus, the personal computer 36 can know the position of the sub-scanning member of the scanner, and can instruct the sub-scanning member reset to minimize the time of image capture.
[0131]
FIG. 11 is a flowchart showing a subroutine of the initial setting process.
[0132]
As shown in FIG. 11, when an initialization command is input in step S300, the process starts. Then, in step S301, here, at the time of screen capture, based on the command data option (each capture parameter preset value) specified from the personal computer 36 together with the command, the amplifier R inside the AD conversion means 39 in FIG. , G and B gains are set.
[0133]
These amplifier gains are registered in advance in the personal computer 36 in the personal computer 36 in advance based on the film information (film type) obtained from the scanner main body 1 in step S118 shown in FIG. The selected film is sent to the scanner body 1.
[0134]
In this way, the setting is made by the personal computer 36 based on the optical information, negative / positive information, and maker information of the film previously detected at the time of power-on shown in FIG.
[0135]
The actual gain adjustment is performed by transferring a clock pulse and an address pulse for gain to a variable gain amplifier inside the AD conversion means 39 (see FIG. 1).
[0136]
In addition to the above, the light amount of the light source may be increased or decreased by changing the ND filter, the aperture, or the drive current, or the integration time of the CCD may be increased or decreased to increase the variable width of the gain. Can also be taken.
[0137]
The method of combining the plurality of types of gain increasing / decreasing means absorbs various variations such as variation in film type, variation in development time, variation in exposure time by a camera (over, under), variation in transmittance due to color, and high quality. This is effective for taking color image data.
[0138]
Since the above value is set to a value that can achieve the white balance of the film, there is a great difference between a red negative base color and a transparent positive base color.
[0139]
Next, in step S301, the optimal values of the R, G, and B gains specified by the personal computer 36 at the time of capturing the screen are set.
[0140]
Then, in step S302, the R, G, B AD set based on the negative / positive information and the maker information of the command data (each fetched parameter preset value) specified from the personal computer 36 when the screen is fetched. An optimum reference voltage for the converter is set. As a result, optimal gamma characteristics and optimal quantization are realized.
[0141]
Specifically, there is a gamma AD composed of AD, DA1 and DA2 inside the AD conversion means 39, and the CCD output is amplified after being subjected to a reset clamp and a black level clamp, and fed to an AD input terminal. You.
[0142]
The reference voltages Vtop and Vbottom of the AD conversion means 39 are supplied by DA1 and DA2, and each DA output voltage is set by a parallel port setting by the scanner main body control means 38.
[0143]
To apply gamma, the reference voltages Vtop and Vbottom of the AD conversion means 39 are first
Vtop = Vref2
Vbottom = Vref1
Fetches the first AD data, and then
Vtop = Vref3
Vbottom = Vref2
Fetches the second AD data, and then
Vtop = Vref4
Vbottom = Vref3
Then, the third AD data is fetched, and the first, second, and third data are added to obtain final AD conversion data.
[0144]
The values of Vref1, Vref2, Vref3, and Vref4 are changed depending on the type of film (negative / positive), the colors (R, G, B), and the development state (over, under). Can be.
[0145]
Next, in step S304, the sub-scanning position is initialized according to a command option from the personal computer 36. Whether to initialize in the left or right direction depends on a command option from the personal computer 36. Usually, it is reset in the forward direction of the CCD.
[0146]
Next, an example of the image reading process of the scanner by the two-line CCD according to the present embodiment will be described based on the flowcharts shown in FIGS.
[0147]
When a preview button (not shown) is double-clicked on the menu on the monitor screen of the personal computer 36, the personal computer 36 starts the pre-scan / preview processing in step S400.
[0148]
Next, in step S401, the personal computer 36 transmits a stepping motor reverse direction predetermined unit drive command to the scanner main body control means 38 of the scanner main body 1 to cause the scanner main body 1 to perform sub-scanning.
[0149]
Here, the predetermined unit of the prescan is a drive amount such that the number of pixels is 64 × 96. Note that the reverse direction here is the reverse direction in CDD.
[0150]
After that, in step S402, the personal computer 36 transmits a one-line image capture command to the scanner main body 1 and causes the scanner main body 1 to read the one-line image signal. The reading mode here is non-delayed.
[0151]
Next, in step S403, the personal computer 36 receives the image data sent from the scanner main body 1 and causes the personal computer 36 to transfer the image data. The personal computer 36 analyzes the data, determines whether or not the image is within the valid image range, and stores the image data if the image is within the valid range. Then, data for proper image capture is calculated from the stored data.
[0152]
The determination as to whether or not the image is within the effective screen range is performed by detecting a perforation edge indicating a screen position as shown in FIG.
[0153]
The perforation edge is performed by the G line having the highest spatial resolution in the main scanning direction among the two-line CCD. The perforation edge in the main scanning direction and the perforation edge in the sub-scanning direction are detected, and a predetermined shift amount is added thereto to become a reference position of an effective image. The reference position exists at both left and right positions of the effective image.
[0154]
Once either of the reference positions is detected, it can be easily determined whether the currently acquired image data is valid based on a predetermined value of the size of the valid image. In the present embodiment, a perforated hole is covered with a dimming mask as shown to prevent saturation of the CCD.
[0155]
Next, in step S404, it is checked whether or not the frame is the last line data. If it is the last data, the process proceeds to step S405. If not, the process returns to step S401.
[0156]
Thereafter, in step S405, the personal computer 36 transmits a stepping motor forward direction predetermined unit drive command to the scanner main body 1 to cause the scanner main body 1 to perform sub-scanning.
[0157]
Here, the predetermined unit of the prescan is a driving amount such that the number of pixels is 256 × 384. It should be noted that the forward direction here refers to the forward direction of the CCD.
[0158]
Next, in step S406, the personal computer 36 sends the calculated capture data to the scanner main body 1, transmits a one-line image capture command, and reads the one-line image signal. The reading mode here is non-delayed.
[0159]
Next, in step S407, the personal computer 36 receives the image data sent from the scanner main body 1 and causes the personal computer 36 to transfer the image data. The personal computer 36 analyzes this data to determine whether or not the image is within the valid image range. If the image is within the valid range, the personal computer 36 displays it on the monitor screen of the personal computer 36.
[0160]
Next, in step S408, it is checked whether or not the frame is the last line data. If it is the last data, the process returns to step S409. If it is not the last data, the process returns to step S405.
[0161]
Next, referring to FIG. 13, when the main scan button (not shown) is double-clicked on the menu on the monitor screen of the personal computer 36, the personal computer 36 starts the main scan processing in step S500.
[0162]
First, in step S501, the sub-scanning member is reset to a sub-scanning start position where the sub-scanning is in the forward direction.
[0163]
Next, in step S502, the personal computer 36 transmits a stepping motor forward direction predetermined unit drive command to the scanner main body 1 to cause the scanner main body 1 to perform sub-scanning. Here, the predetermined unit of the main scan is a drive amount such that the number of pixels becomes the image size set on the screen of the personal computer 36.
[0164]
Thereafter, in step S503, the personal computer 36 transmits the hardware parameters for optimal reading obtained by the pre-scan to the scanner main body 1, sets the hardware parameters in the scanner main body 1, and captures a one-line image. A command is transmitted to read a one-line image signal. In the reading mode, if the image size is such that the sub-scanning drive is performed by 2 pixels or more within the integration time, non-delayed reading is performed.
[0165]
As described above, by changing the readout mode in accordance with the image size, it is possible to simplify and speed up the scanner without the need for complicated post-processing for the problem of color misregistration.
[0166]
Next, in step S504, the personal computer 36 receives the image data sent from the scanner main body 1, and causes the personal computer 36 to transfer the image data. The personal computer 36 analyzes this data, determines whether or not the image is within the valid image range, and if so, displays the image data on the monitor of the personal computer 36.
[0167]
Next, in step S505, it is checked whether or not the frame is the last line data. If it is the last data, the process returns to step S506. If it is not the final data, the process returns to step S502.
[0168]
Next, a second embodiment of the present invention will be described.
[0169]
The configuration of the second embodiment is the same as that of the first embodiment, except that the image capturing processing operation by the two-line CCD is slightly different. Therefore, only the different points will be described here, and the description of the other configurations and operations will be omitted.
[0170]
In the flowcharts of the first embodiment shown in FIGS. 12 and 13 described above, the pre-scan and the preview are set, but the present invention is not limited to this. Therefore, in the scanner device of the second embodiment, after the step S404 (see FIG. 12) is returned, the prescan and the preview are set as separate subroutines, and the bidirectional subscan is permitted. It is characterized by. The other operations are the same as those of the first embodiment, and the description is omitted here.
[0171]
Next, a third embodiment of the present invention will be described.
[0172]
The configuration of the third embodiment is the same as that of the first embodiment, except that the image reading operation by the two-line CCD is slightly different. Therefore, only the different points will be described here, and the description of the other configurations and operations will be omitted.
[0173]
FIG. 14 is a flowchart showing an image reading process (thumbnail scanning process) in the scanner device according to the third embodiment.
[0174]
As shown in the figure, in the scanner device of the third embodiment, when a thumbnail button (not shown) is double-clicked on a menu on the monitor screen of the personal computer 36, the personal computer 36 executes the thumbnail scanning process in step S600. To start.
[0175]
In step S601, the personal computer 36 transmits a frame feed command to the scanner main body control means 38 of the scanner main body 1, and causes the scanner main body 1 to set a target frame. Note that the scanner body 1 does nothing particularly when the target frame is set immediately.
[0176]
Next, in step S602, the personal computer 36 receives the frame information of the set frame from the scanner main body 1, and displays the aspect, shooting date, etc. of the frame on the monitor. In particular, the aspect is displayed as an aspect frame (see the dotted line in FIG. 16).
[0177]
Next, in step S603, the personal computer 36 receives the predetermined unit drive command from the scanner main body 1 and causes the scanner main body 1 to perform sub-scanning. The sub-scanning direction is bidirectional, so the sub-scanning direction differs for each frame. Here, the predetermined unit of the thumbnail scan is a drive amount such that the number of pixels is 64 × 96.
[0178]
In step S604, the personal computer 36 sends a one-line image capture command to the scanner body 1 to cause the scanner body 1 to read the one-line image signal. The reading mode here is non-delayed.
[0179]
Thereafter, in step S605, the personal computer 36 receives the image data sent from the scanner main body 1 and causes the personal computer 36 to transfer the image data. The personal computer 36 analyzes this data, determines whether or not the image is within the valid image range, and if so, displays the image data on the monitor of the personal computer 36. Then, a parameter for acquiring a proper main scan image is calculated from the obtained data, and stored for each frame.
[0180]
The above parameters are used when the preview screen or the main scan is performed by clicking the thumbnail screen, and the pre-scan time is reduced to enable easy-to-use scan.
[0181]
The display direction on the monitor of the personal computer 36 differs for each frame as shown in FIGS.
[0182]
19 and 20 show display examples for relieving a sense of discomfort in the display. FIG. 19 shows a screen during capture fixedly displayed in a part of the window, and displays a thumbnail of one frame every time the capture of one frame is completed. It is an example. FIG. 20 shows an example in which the capturing bar display is fixedly displayed in a part of the window, and the thumbnail screen is displayed one frame at a time when the capturing of one frame is completed.
[0183]
The determination as to whether or not the image is within the effective screen range is made by detecting a perforation edge indicating a screen position as shown in FIG.
[0184]
The perforation edge is performed by the G line having the highest spatial resolution in the main scanning direction among the two-line CCD. Therefore, the shift amount from the edge to the origin of the effective image needs to be changed depending on the direction of the sub-scan.
[0185]
In addition, the reading before entering the effective image is performed only by the G line output. In order to shorten the time and reduce the error in the edge position detection, a predetermined high resolution reading is always performed regardless of the setting of the captured image size. It is devised to do.
[0186]
Next, in step S606, it is checked whether or not the frame is the last line data. If it is the last data, the process proceeds to step S607, and if not, the process proceeds to step S603.
[0187]
Thereafter, in step S607, it is checked whether or not the frame is the last frame, and if it is the last frame, the process returns to step S608. If it is not the last frame, the process returns to step S601.
[0188]
Next, a fourth embodiment of the present invention will be described.
[0189]
The fourth embodiment has the same configuration as that of the first embodiment, but differs slightly in the image capturing processing operation by the two-line CCD. Therefore, only the different points will be described here, and the description of the other configurations and operations will be omitted.
[0190]
FIG. 15 is a flowchart illustrating an image capturing process (thumbnail scanning process) in the scanner device according to the fourth embodiment.
[0191]
As shown in the figure, the scanner device according to the fourth embodiment is another embodiment of the thumbnail image reading process of the scanner device using the two-line CCD, and when the captured image is over or under, it is automatically performed. The capture parameters are set again and the capture is performed again.
[0192]
Except that the judgment processing step S700 is inserted, it is the same as the flowchart of the third embodiment shown in FIG.
[0193]
In step S700, if it is determined that the deviation of the histogram of the captured image data is equal to or higher than a predetermined level, the process returns to step S603.
[0194]
Next, a fifth embodiment of the present invention will be described.
[0195]
The fifth embodiment has the same configuration as that of the first embodiment, but is characterized in that line images with a plurality of exposure amounts are read out by delay reading for each sub-scan. Therefore, only the different points will be described here, and the description of the other configurations and operations will be omitted.
[0196]
FIG. 22 is a flowchart illustrating an image capturing operation in the scanner device according to the fifth embodiment.
[0197]
First, in step S800, when the image capturing operation is started, in step S801, the scanner main body control means 38 (see FIG. 1) drives the stepping motor 6 by a predetermined unit step. Here, the predetermined unit step is (pixel width of CCD) × (imaging magnification of imaging lens) here.
[0198]
Next, in step S802, CCD integration reset is performed to reset the photocharges previously stored in the photocell of the CCD 7.
[0199]
As for the reset method, in the case of a CCD with a shutter function, it is sufficient to directly discharge the overflow to the overflow drain. However, the CCD with this function is not generally used for a linear CCD because the arrangement of the overflow drain is restricted. Even if there is one, it is often expensive due to the large step size and the like.
[0200]
In the present embodiment, in consideration of such circumstances, non-delayed reading is performed at high speed, and the reset function is realized. Incidentally, in the case of ordinary delay reading, charges at the time of reset remain in the delay buffer, which is inconvenient.
[0201]
Next, in step S803, exposure is performed for 2 msec. In step S804, ROG, V1, and V2 are output with the above-described delayed read timing pulse, and one pulse of CK is output, so that one pixel data G (2 msec) is output from the CCD 7. , R (2 msec) or G (2 msec).
[0202]
Next, in step S805, this is stored in a predetermined address of a storage means such as a RAM in the scanner main body control means 38, for example.
[0203]
Thereafter, in step S806, it is determined whether the read pixel is the last pixel. If not, the process returns to step S804 to add one clock pulse to CK and read the next pixel data. Hereafter, ROG, V1 and V2 are not changed. Thereafter, the same loop is performed, and the pixel data is sequentially stored in the RAM in the scanner main body control means 38.
[0204]
On the other hand, if it is determined in step S806 that the read pixel is the last pixel, the process advances to step S807 to determine whether the pixel is the last sub-scanning position.
[0205]
In this way, the line image of 2 msec integration is stored in the area of the internal RAM of the scanner main body control means 38 by the above loop.
[0206]
In the above step S807, it is determined at the sub-scanning position whether or not it is the last line of the target image. If it is the capturing position of the final line image, the process returns to step S808. If it is not the capturing position of the final line image, the process returns to step S801. Return to continue capturing the target image.
[0207]
Next, a sixth embodiment of the present invention will be described.
[0208]
The sixth embodiment has the same configuration as the first and fifth embodiments, but is characterized in that the stepping motor is operated at a constant speed to perform gradation compression capture. Therefore, only the different points will be described here, and the description of the other configurations and operations will be omitted.
[0209]
According to the scanner device of the fifth embodiment, it is possible to obtain a good image without color misregistration, but on the other hand, the speed of the sub-scanning drive is not uniform, so that the sub-scanning drive sound is annoying. There are cases. This is particularly remarkable when a thinning-out operation is performed such that data is skipped every time driving is performed several times in the sub-scanning direction.
[0210]
In view of such circumstances, the scanner device of the sixth embodiment is characterized in that the stepping motor is operated at a constant speed. This operation not only solves the above-mentioned annoying sound problem, but also greatly shortens the data capture time, making it ideal for image capture mode where high-speed reading such as preview is the highest priority. It is.
[0211]
FIG. 23 is a flowchart showing an image capturing operation in the scanner device according to the sixth embodiment.
[0212]
First, in step S900, when the image capturing operation is started, in step S901, the scanner main body control means 38 permits a timer interrupt for stepping motor unit drive.
[0213]
Then, in step S902, the scanner main body control means 38 permits the CCD integration X1ms timer interrupt, and in step S903, runs the timer.
[0214]
Thus, as shown in FIG. 26, the two timers for driving the stepping motor and for integrating the CCD run cyclically. As a result, by performing the respective interrupt processes shown in FIGS. 24 and 25 in accordance with the generated interrupt, the stepping motor can be operated at a constant speed, and the image can be captured by CCD integration.
[0215]
Next, in step S904, it is determined whether the sub-scanning position is the last sub-scanning position of the captured image. Here, if it is not the last, the process returns to step S904, and if it is the last, in step S905, the timer is stopped.
[0216]
Then, in step S906, the stepping motor unit driving timer interrupt is prohibited, and in step S907, the CCD integration X1ms timer interrupt is prohibited, and the process returns in step S908.
[0217]
Next, a subroutine of the CCD integration X1ms timer interrupt process will be described.
[0218]
FIG. 24 is a flowchart showing a subroutine of the CCD integration X1 ms timer interrupt processing.
[0219]
When the subroutine of the CCD integration X1 ms timer interrupt process is called in step S1000, in step S1001, ROG, V1, and V2 are output with a delayed read timing pulse, and CK is output as one pulse. The pixel data G (X1 msec), R (X1 msec) or G (X1 msec) is read.
[0220]
Next, in step S1002, this is stored in a predetermined address of a storage means such as a RAM in the scanner main body control means 38, and in step S1003, it is determined whether or not the read out pixel is the last pixel. If it is not the last pixel, the process returns to step S1001, adds one clock pulse to CK, and reads the next pixel data. Thereafter, the same loop is performed, and the pixel data is sequentially stored in the RAM in the scanner main body control means 38.
[0221]
On the other hand, if it is determined in step S1003 that the read pixel is the last pixel, the process returns to step S1004.
[0222]
FIG. 25 is a flowchart showing a subroutine of the stepping motor unit driving timer interrupt processing.
[0223]
In step S1100, when the timer interrupt processing subroutine for stepping motor unit drive is called, in step S1101, a drive pulse is sent to the stepping motor to drive a predetermined unit, and the process returns in step S1102.
[0224]
Next, the setting of the sub-scanning drive speed will be described in detail.
[0225]
The driving speed of the sub-scanning is determined from the length of the target image in the sub-scanning direction, the CCD integration time, the readout time, the gradation compression processing time, the image data transfer processing time to the personal computer 36, and the number of readout line images. Is determined as follows.
[0226]
“Driving speed of sub-scanning” <= “length of sub-scanning method of target image” ÷
｛(“CCD integration time” + “CCD read processing time” +
"Image processing time (color conversion / gradation compression processing, etc.)") x number of read-out line images /
Here, the transfer processing time to the personal computer 36 depends on the performance (clock frequency and the like) of the personal computer 36, and therefore cannot be obtained as a uniform design value.
[0227]
Therefore, in the present embodiment, a device is used in which a dummy transfer process as shown in FIG. 27 is executed before image capturing, and the processing capability of the personal computer 36 is measured in advance.
[0228]
That is, dummy transfer processing starts in step S1200, N = 1 in step S1201, and timer counting is started in step S1202. Thereafter, in step S1203, dummy data of one pixel is read from the internal storage means (RAM) of the scanner main body control means 38, and transferred to the personal computer 36 in step S1204.
[0229]
Next, in step S1205, it is determined whether or not one-line image transfer has been completed. If not completed, the process returns to step S1203. If completed, the timer count is stopped in step S1206. .
[0230]
Thereafter, in step S1207, the timer count value is stored in the N-th address of the internal RAM of the scanner main body control means 38, and "N" is incremented in step S1208.
[0231]
Next, in step S1209, it is determined whether or not the number of dummy transfers has reached 20 times. If the number of times has not reached 20 yet, the process returns to step S1202. After performing the dummy transfer 20 times in order to perform the transfer, the longest processing time is adopted as the personal computer 36 transfer processing time.
[0232]
In the scanner devices of the above embodiments, an example using a two-line type CCD line sensor has been described. However, the present invention can be applied to a three-line type line sensor having one line for each of RGB. is there. In this case, a buffer need not be used.
[0233]
Further, in the scanner device of each of the above-described embodiments, an example has been described in which the CCD line sensor is sub-scanned, but it goes without saying that a document such as a film may be sub-scanned.
[0234]
As described above, according to the scanner devices of the above embodiments, the following effects can be obtained.
[0235]
(1) The total time required for acquiring image data is shortened as much as possible by configuring the pre-scan direction in which no image is displayed in a reverse direction, the preview in which an image is displayed, and the main scan direction in a forward direction. be able to. In addition, the main scan is always performed in one direction, and stable and accurate image data can be obtained without color shift.
[0236]
(2) The total time required for image data acquisition can be short-circuited as much as possible by configuring bidirectional scanning for pre-scan and preview without worrying about image quality, and for main scanning only in the forward direction. Can be. In addition, the main scan is always performed in one direction, and stable and accurate image data can be obtained without color shift.
[0237]
(3) The preview which does not file image data is read out by non-delayed reading, bidirectional scanning is permitted, and the main scanning is delayed reading and only forward direction is permitted, so that the total time required for image data acquisition is reduced. It can be short-circuited as much as possible. In addition, the main scanning is always performed in one direction, and stable and accurate image data acquisition without color shift can be performed.
[0238]
(4) By switching between delayed reading and non-delayed reading based on the image size, the total time required for image data acquisition can be short-circuited as much as possible. In addition, the main scan is always performed in one direction, and stable and accurate image data can be obtained without color shift.
[0239]
(5) By configuring the thumbnail scan that does not matter the image quality to permit bidirectional scanning and permit the main scan only in the forward direction, the total time required for acquiring image data can be short-circuited as much as possible. In addition, the main scan is always performed in one direction, and stable and accurate image data can be obtained without color shift.
[0240]
As described above, by restricting in the sub-scanning direction based on the image capturing mode, it is possible to prevent a decrease in capturing accuracy by the sub-scanning mechanical mechanism as shown in FIGS. 28 to 30 and to reduce the total time required for image data acquisition. It can be short-circuited as much as possible.
[0241]
[Appendix]
According to the embodiment of the present invention as described in detail above, the following configuration can be obtained. That is,
(1) In a scanner device that captures a color document and captures image data,
A first image input mode for acquiring a preview screen;
Image capture mode setting means for selecting a second image input mode for acquiring a main scan screen;
Has,
A first image input mode in which forward and reverse bidirectional sub-scanning is possible; and a second image input mode in which normal and reverse sub-scanning is possible in one direction. .
[0242]
(2) The scanner device according to (1), wherein the sub-scanning direction in the second image input mode is a direction opposite to a biasing direction of the sub-scanning member.
[0243]
As shown in FIGS. 28 to 30, in the second image input mode, the scanning direction of the sub-scanning member is set to the opposite direction to the biasing direction, so that the carriage is not stably played due to the sub-scanning. As a result, stable and accurate high-quality image capture is possible.
[0244]
(3) Image capture mode setting for selecting a first image input mode for acquiring a thumbnail screen and a second image input mode for acquiring a main scan screen in a scanner device that captures a color document and captures image data. Having means,
In the first image input mode, forward and reverse bidirectional subscanning is possible, and in the second image input mode, forward and reverse one direction subscanning is possible. Scanner device.
[0245]
(4) sub-scanning means having a two-line color line sensor with a delay memory for imaging a color document, and sub-scanning the two-line color line sensor with a delay memory;
A first image input mode in which only the integration of the line sensor is performed during the sub-scan;
A second image input mode for integrating the line sensor after the sub-scan;
A scanner device comprising:
[0246]
(5) The scanner device according to (4), wherein the first image input mode is a thumbnail display screen acquisition mode, and the second image input mode is a main scan screen acquisition mode.
[0247]
(6) The scanner device according to (4), wherein the line sensor is a two-line color line sensor with a one-line delay memory.
[0248]
(7) The scanner device according to (4), wherein the line sensor is a two-line color line sensor with a two-line delay memory.
[0249]
(8) a three-line color line sensor for imaging a color document, the three-line color line sensor including a sub-scanning unit;
A first image input mode in which only the integration of the line sensor is performed during the sub-scan;
A second image input mode for integrating the line sensor after the sub-scan;
A scanner device comprising:
[0250]
(9) In a scanner device that captures a color document and captures image data,
A first image capturing mode capable of performing only forward sub-scanning,
A second image capturing mode capable of bidirectional sub-scanning,
A scanner device comprising:
[0251]
(10) The main scan for capturing a high-quality image is executed in the first image capture mode, and any one of a pre-scan for preliminarily capturing an image, a preview for preliminary capturing an image, and a thumbnail for displaying images of all frames. The scanner according to (9), wherein the scanning is performed in the second image capturing mode.
[0252]
(11) In a scanner device in which a color document is imaged by a line sensor with a delay buffer and image data is taken in,
A scanner device, which switches between delayed readout with a delay read through the delay buffer and non-delayed readout with no delay depending on the size of a captured image (number of pixels).
[0253]
(12) The main scan for capturing a high-quality image is executed by the above-described delayed reading, and one of the pre-scan for preliminarily capturing an image, the preview for preliminary capturing of an image, and the thumbnail for displaying images of all frames is not the above-described one. The scanner device according to (11), which is executed by delayed reading.
[0254]
(13) In the main scan, the sub-scan of the line sensor is performed only in the forward direction in which the color shift is prevented by the delay operation, and the pre-scan, the preview, and the thumbnail are performed in any of the forward direction and the reverse direction. The scanner device according to the above (11), which permits sub-scanning.
[0255]
(14) image data input means for taking an image of the document and taking image data by relatively sub-scanning the line sensor and the document;
First image capture control means for performing the sub-scan of the line sensor only in the forward direction or the reverse direction and capturing the image data with high image quality;
Second image capture control means for performing the sub-scan of the line sensor in both forward and reverse directions to capture the image data;
A scanner device comprising:
[0256]
(15) The image data input means includes the at least two or more sensor rows and a delay buffer for storing image data of at least one or more of the sensor rows for preventing color misregistration. The scanner device according to (14), wherein the direction of the sub-scan of the sensor is a positive direction in which the color misregistration can be prevented by using the image data stored in the delay buffer.
[0257]
(16) The scanner device according to (14), wherein the direction of the sub-scanning of the line sensor or the document is a positive direction in which a color shift of the image data captured by the line sensor can be prevented.
[0258]
(17) The first image capture control means performs delayed reading of image data readout from the line sensor, and the second image capture control means performs non-delayed readout of image data from the line sensor. The scanner device according to (14), wherein the scanner device performs.
[0259]
(18) The first image capture control means captures image data from the line sensor when the sub-scanning drive is stopped, and the second image capture control means captures image data from the line sensor. The scanner device according to (14), wherein the capturing is performed during the driving of the sub-scan.
[0260]
(19) The scanner device according to (14), wherein the first image capture control unit performs prescan in a reverse direction and performs preview in a forward direction. (A configuration corresponding to the effect (1) of the embodiment of the present invention).
[0261]
(20) image data input means for capturing an image of a document by sub-scanning the line sensor with a delay buffer and capturing image data;
At the time of preview or pre-scan, the sub-scan permits a bidirectional scan in a forward direction and a reverse direction, and performs first non-delayed reading control means;
At the time of the main scan, the sub-scan is allowed only in the forward direction, and the second control means for performing the delayed reading is provided;
A scanner device comprising: (Configuration corresponding to effect (3) of the embodiment of the present invention).
[0262]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a scanner device that can obtain an image without color shift and can capture an image in the shortest time according to the quality of a target image.
[Brief description of the drawings]
FIG. 1 is a block circuit diagram illustrating a configuration of a scanner device according to a first exemplary embodiment of the present invention, illustrating a state where a cartridge film adapter is mounted on a scanner main body that is an image capturing unit. .
FIG. 2 is a perspective view of a main part showing a cartridge film adapter, a film information detecting unit, and a peripheral portion thereof in the scanner device of the first embodiment.
FIG. 3 is an explanatory diagram showing a configuration of a CCD (linear sensor) in the scanner device according to the first embodiment.
FIG. 4 is a timing chart illustrating the operation of a CCD (2-line CCD) in the scanner device according to the first embodiment.
FIG. 5 is a graph showing the degree of color misregistration based on a theoretical equation for the CCD in the scanner device according to the first embodiment with and without delay and in the forward and reverse directions of sub-scanning, and the vertical axis shows the amount of color misregistration. FIG. 4 is a diagram showing the sub-scanning movement amount (pixel unit) during CCD integration on the horizontal axis (pixel unit).
FIG. 6 is an explanatory diagram showing a configuration of a CCD capable of further reducing color misregistration in the scanner device of the first embodiment.
FIG. 7 shows the degree of color misregistration of the CCD shown in FIG. 6 in the scanner device of the first embodiment based on the theoretical formula for the case with and without delay and the case of forward and backward sub-scanning, respectively. FIG. 3 is a diagram showing a color shift amount (pixel unit) on an axis and a sub-scanning movement amount (pixel unit) during CCD integration on a horizontal axis.
FIG. 8 is a flowchart illustrating a processing routine that is started when the power of the scanner body is turned on in the scanner device of the first embodiment.
FIG. 9 is a flowchart illustrating a processing routine that is started when the power of the scanner body is turned on in the scanner device according to the first embodiment.
FIG. 10 is a block diagram of the scanner apparatus of the first embodiment when a command is transmitted from the personal computer to transmit the current position information of the sub-scanning member of the scanner to the personal computer. It is a flowchart showing a command processing routine.
FIG. 11 is a flowchart illustrating a subroutine of an initial setting process in the scanner device according to the first embodiment.
FIG. 12 is a flowchart illustrating an example of an image reading process (pre-scan / preview process) using a two-line CCD in the scanner device according to the first embodiment.
FIG. 13 is a flowchart illustrating an example of an image reading process (main scan) using a two-line CCD in the scanner device according to the first embodiment.
FIG. 14 is a flowchart illustrating image reading processing (thumbnail scanning processing) in the scanner device according to the third embodiment of the present invention.
FIG. 15 is a flowchart illustrating image reading processing (thumbnail scanning processing) in the scanner device according to the fourth embodiment of the present invention.
FIG. 16 is an explanatory diagram showing an example of thumbnail display in the scanner device according to the fourth embodiment.
FIG. 17 is an explanatory diagram showing a display direction for each frame in thumbnail display in the scanner device of the fourth embodiment.
FIG. 18 is an explanatory diagram showing a display direction for each frame in thumbnail display in the scanner device of the fourth embodiment.
FIG. 19 is an explanatory diagram showing an example in which, during thumbnail display in the scanner device of the fourth embodiment, a screen during capture is fixedly displayed on a part of a window, and one frame thumbnail is displayed each time capture of one frame is completed. .
FIG. 20 is an explanatory diagram showing an example in which, during thumbnail display in the scanner device according to the fourth embodiment, a capturing bar display is fixedly displayed on a part of a window, and a thumbnail screen is displayed one by one upon completion of capturing of one frame. It is.
FIG. 21 is an explanatory diagram illustrating an effective image range of an image in the scanner device according to the first embodiment.
FIG. 22 is a flowchart illustrating an image capturing operation in the scanner device according to the fifth embodiment of the present invention.
FIG. 23 is a flowchart illustrating an image capturing operation in the scanner device according to the sixth embodiment of the present invention.
FIG. 24 is a flow chart showing a CCD integration X1 timer interrupt processing operation in the scanner device of the sixth embodiment.
FIG. 25 is a flowchart showing a stepping motor unit driving timer interrupt processing operation in the scanner device of the sixth embodiment.
FIG. 26 is an explanatory diagram showing operations of a stepping motor unit driving timer and a CCD integration X1 timer in the scanner device of the sixth embodiment.
FIG. 27 is a flowchart illustrating a dummy transfer process in the scanner device according to the sixth embodiment.
FIG. 28 is an explanatory diagram of the capturing accuracy by the sub-scanning mechanism.
FIG. 29 is an explanatory diagram of the capturing accuracy by the sub-scanning mechanism.
FIG. 30 is an explanatory diagram of the capturing accuracy by the sub-scanning mechanism.
[Explanation of symbols]
1. Scanner body
2. Adapter for cartridge film
5 Stepping motor driving means
6 ... Stepping motor
7 ... CCD
8. Carriage
36 ... Personal computer
37 Communication means
38: Scanner main body control means
39 AD conversion means
41 ... Fluorescent lamp
44 ... Film cartridge control means
50 ... Film cartridge
59 ... Data disk

Claims (2)

Image data input means for capturing the color document by capturing the color document by relatively scanning the line sensor and the color document,
First image capture control means for performing the sub-scan of the line sensor only in one of the forward direction and the reverse direction and capturing the image data with high image quality;
Second image capturing control means for performing the sub-scanning of the line sensor in both forward and reverse directions to capture the image data;
Equipped with,
The main scan for capturing a high-quality image is executed by the first image capture controller, and either a pre-scan for preliminary capturing an image, a preview for preliminary capturing an image, or a thumbnail for displaying a plurality of images is performed. A scanner device which is executed by the second image capture control means . The line sensor is a line sensor with a delay buffer, and when executing image capture by the second image capture control means, performs non-delayed readout without delay through the delay buffer; When an image is captured by the first image capturing control means, switching is made between the delayed reading that is read with a delay via the delay buffer and the non-delayed reading that is performed without performing the delay, depending on the size of the captured image. The scanner device according to claim 1, wherein:

Images