JPH0417527B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image processing device used in a device that handles image information, such as an information file device.

[Prior art]

2. Description of the Related Art A so-called information file device for recording and storing a large amount of documents, drawings, etc. as image information has been put into practical use.
In such devices, an image input device (reading device) that uses a one-dimensional image sensor generally scans a single document image in units of scanning lines with the pixel arrangement direction of the image sensor as the main scanning direction. It is read in the form of dot data. The image information read as dot data is temporarily stored in an image memory (page memory) and displayed on a display device such as a CRT display for confirmation by an operator. At this time, it is of course possible to display the entire input document image (the entire image information stored in the image memory), but it is also possible to enlarge and display a part of the image information according to the operator's instructions. is also possible. This is because the display capacity of the display device is quite small compared to the amount of data read by the image input device, so if the entire image information is displayed all at once on the screen of the display device, the image will be too small and difficult to see. This is also because the resolution of the image also decreases.

Then, when the operator issues an instruction after confirming the image information on the display device, the image information stored in the image memory is stored and saved in a storage medium such as an optical disk.

[Problems to be Solved by the Invention] By the way, in the conventional information film devices as described above, it has not been possible to print an enlarged image as it is displayed on the screen of the display device. The reason is as follows.

As mentioned above, in the conventional information file device, the image input device reads the original image in the form of dot data, but the printing device that prints the image information also prints the image information as dot data in the form of a dot pattern. This is a common configuration. Therefore, if the resolution of the image input device, that is, the number of dots and lines read in the horizontal and vertical directions of the image input device, is the same as the resolution of the printing device, the image can be read and input by the image input device. The configuration is such that the image information stored in the image memory can be printed as is, that is, the dot data stored in the image memory can be printed one-on-one as a dot pattern using the printing device. For this reason, it is not possible to print an enlarged image of part of the image information obtained by reading a document image on a display device, or in other words, to print an enlarged document image.

[Means for solving problems]

The present invention has been made in view of the above circumstances, and it is possible to enlarge and display part of input image information on a display device in the horizontal direction, that is, the main scanning line direction, and in the vertical direction, that is, the sub-scanning line. By comparing the size in the direction, specifically the number of dots on the scanning line and the number of scanning lines, with the size in the horizontal and vertical directions of the image information printed by the printing device, the image information to be printed is determined. By calculating the magnification of the image displayed on the display device, and then enlarging the portion of the image displayed on the display device in the image information on the image memory and outputting it to the printing device. ,
An object of the present invention is to provide an image processing device capable of printing an image enlarged and displayed on a display screen in its original size.

The present invention includes an image memory for storing image information, a display device for enlarging and displaying a part of the image information stored in the image memory, and a printing device for printing the image information. an image processing device comprising: a display size register for storing the size of an image enlarged and displayed on the display device on the image memory in each of the main scanning direction and sub-scanning direction of the display device; and a printing size register for storing sizes in the main scanning direction and sub-scanning direction of the display device for image information printed by the device, and the image memory for the image displayed on the display device. The magnification in the main scanning direction and the sub-scanning direction of the size of the image information printed by the printing device with respect to the above size is determined based on the stored value of each of the registers, and the magnification in the main scanning direction is determined according to the magnification. The apparatus further includes a control circuit that outputs image information displayed on the display device to the printing device by expanding the length in the main scanning direction and displaying scanning lines in duplicate in the sub-scanning direction. Features.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on drawings showing embodiments thereof.

FIG. 1 is a block diagram showing the configuration of an image processing apparatus according to the present invention. Although the image processing apparatus of the present invention is mainly used as an information file apparatus, FIG. 1 shows a block diagram of only the part of the image processing apparatus.

The page memory 1 is an image memory that stores image information of a document image in units of one page (one sheet).
Dot data is read and input from an image input device such as an image sensor of an information file device into which the device of the present invention is incorporated, at a resolution of, for example, 8 bots/mm (main scanning direction) x 7.7 lines/scanning line (sub scanning direction). Temporarily stores image information. The page memory 1 also stores image information when image information stored in a storage medium such as an optical disk device of an information file device is searched and read out. The stored contents of the page memory 1, ie, dot data of image information, are outputted to the data bus 5 via the interface 2.

The enlargement/reduction circuit 3 converts the number of dots of the image information and performs enlargement or reduction processing, and the details thereof can be found in the patent application filed in 1986 by the present applicant.
-20632. The enlarging/reducing circuit 3 receives data from the data bus 5 and outputs the enlarged/reduced data to the data bus 5.

The display memory 7 is a display device for displaying image information.
A memory that temporarily stores information for display on the CRT display 8, and stores the array of storage elements.
There is a one-to-one correspondence with the arrangement of display dots on the display screen of the CRT display 8. Therefore, when a part of the stored contents of the page memory 1 is stored as is or after being enlarged/reduced by the above-mentioned enlargement/reduction circuit 3 and transferred to the display memory 7,
The image information that is the stored content is displayed on the CRT display 8. Image information as data to be stored in the display memory 7 is input from the data bus 5 via the interface 6.

The data latch circuit 9 once latches and holds serial data (dot data of image information) applied via the interface 4. The data latched in the data latch circuit 9 is applied to a parallel/serial (parallel/serial) conversion circuit 10.

The parallel/serial conversion circuit 10 uses the data given from the data latch circuit 9 as described above as print data PD, and outputs the data to the selector 12 (described later).
The serial data is converted into serial data and output to the printing device 14 in synchronization with the magnification clock EC given by .

The printing device 14 uses, for example, a dot printer, and is supplied with serial data (dot data of image information) as printing data PD outputted from the parallel/serial conversion circuit 10 as described above. The printing device 14 also outputs a printing clock PC of a constant cycle to the frequency dividing circuit 11, which serves as a reference for its own printing operation. Note that this printing clock PC has the same cycle and timing as the capturing clock GC that defines the timing of capturing the printing data PD by the printing device 14 itself.

The frequency dividing circuit 11 divides the frequency of the printing clock PC provided from the printing device 14 into a plurality of types of clocks each having a different period, and outputs each of the divided clocks to the selector 12.

The selector 12 is a so-called multiplexer,
By switching the selector 12 in response to the magnification signal ES given from the control circuit 13, one of the divided clocks output from the frequency dividing circuit 11 is selected, and this is used as the magnification clock EC to perform the above-mentioned parallel/ It is output to the serial conversion circuit 10.

Note that when the magnification signal ES from the control circuit 13 instructs the same magnification, the selector 12
The printing clock PC outputted from 4 is directly outputted to the parallel/serial conversion circuit 10 as a magnification clock EC, and when the magnification signal ES specifies, for example, 2x, the selector 12 receives the signal from the frequency dividing circuit 11. Among the frequency-divided clocks, select the frequency-divided clock obtained by dividing the printing clock PC by 1/2 as the magnification clock EC, and set the parallel/
The frequency divided clocks output to the serial conversion circuit 10 and divided into 1/3, 1/4, etc. may be selected as the magnification clock EC in the case of triple, quadruple, etc., respectively.

As described above, the control circuit 13 is configured to select one of the multiple types of text frequency clocks provided from the frequency dividing circuit 11 to the selector 12 as the magnification clock EC. The magnification of exponent image information is calculated, and it has a register group for storing numerical values necessary for the calculation. These register groups will be explained below.

For example, it is assumed that image information is stored in the page memory 1 as shown in FIG. 2a. In addition, the second
In figure a, the area within the broken line is the original image;
As shown in FIG. 2b, the area within the bold line is enlarged by the enlargement/reduction circuit 3 and displayed on the CRT display 8.
It is assumed that the image is enlarged and displayed, and this is printed by the printing device 14 as shown in FIG. 2c.

In this case, the reference address register PBA is
Stores and reads out the reference address S (the origin of the image displayed on the CRT display 8, that is, the address on the page memory 1 at the upper left corner) indicating the position of the image displayed on the CRT display 8 on the page memory 1. Start address register
PSA stores the start address S to S+y of each scanning line on the page memory 1 of the image displayed on the CRT display 8, and the horizontal display size register PXS stores the page address of the image displayed on the CRT display 8. The vertical display size register PYS stores the horizontal size (length in the main scanning direction) x on the memory 1, and the vertical display size register PYS stores the vertical size (length in the sub-scanning direction, in other words) in the page memory 1 of the image displayed on the CRT display 8. The horizontal printing size register CXS stores the horizontal size (length in the scanning line direction) of the image information printed by the printing device 14, and the vertical printing size register CXS stores the horizontal size (length in the scanning line direction) of the image information printed by the printing device 14. The image size register CYS stores the vertical size (length in the sub-scanning direction, ie, number of scanning lines) n of image information printed by the printing device 14.

The operation of the apparatus of the present invention configured as above will be explained below.

Now, the image is read from an image input device (not shown),
Alternatively, image information for one original image (one page) stored in an optical disk device or the like is stored in the page memory 1 in the form of dot data, as shown in FIG. 2a.
Suppose that it is stored in .

The image information stored in the page memory 1 is first transferred to the enlargement/reduction circuit 3, where it is appropriately enlarged or reduced so that the entire image is displayed on the screen of the CRT display 8. The enlarged/reduced image information is transferred to the display memory 7 and stored therein, so that the entire document image, that is, all image information, specifically, the area within the broken line in FIG. 2a, is displayed on the CRT display 8. be done.

Here, when the operator specifies an arbitrary area of the image displayed on the CRT display 8, for example, the area within the thick line in FIG. The dot data of a designated area of the image information being displayed is sequentially transferred one scanning line at a time to the enlargement/reduction circuit 3 for enlargement processing, and is further transferred and stored in the display memory 7. As a result, on the display screen of the CRT display 8, the area designated for enlargement by the operator within the entire image information that was initially displayed is enlarged and displayed as shown in FIG. 2b.

At this time, with respect to the original image information of the image enlarged and displayed on the CRT display 8, in other words, the reference position S on the page memory 1, that is, the origin (upper left corner) of the image enlarged and displayed on the display screen of the CRT display 8. The location of page memory 1 is stored in the reference address register PBA. In addition, the horizontal size (specifically, the size in the main scanning direction, that is, the number of dots) x and the vertical display size (specifically, the sub-scanning direction) of the image enlarged and displayed on the CRT display 8 on the page memory 1 The size in the scanning direction (ie, the number of scanning lines) y is stored in a horizontal display size register PXS and a vertical display size register PYS, respectively.

On the other hand, the control circuit 13 controls the printing size of each paper by the operator specifying the printing size by the printing device 14, that is, the size of the paper used for actual printing, such as A4, A5..., B4, B5... The print size corresponding to the size (specifically, the size in the main scanning direction, i.e., the number of dots, and the size in the sub-scanning direction, i.e., the number of scanning lines) is stored in the horizontal print size register.
Stored in CXS and vertical print size register CYS.

Note that the read start address register PSA contains
The reference address S stored in the reference address register PBA is set as the read start address of the first line, and the following addresses up to address S+y are stored as the read start addresses of the respective lines.

Now, when the operator instructs printing of the image enlarged on the CRT display 8 as shown in FIG.
The horizontal magnification during printing is calculated by comparing the stored values with .

And from page memory 1, page memory 1
For each scan from the scanning line at the address of the reference position S stored in the reference address register PBA among the image information stored in the The range of the main scanning direction length x of each scanning line (the value stored in the horizontal display size register PXS) from the line readout start address S to S+y, in other words, the CRT of the image information stored in the page memory 1.
The dot data of the portion of the image enlarged and displayed on the display 8 is sequentially read out and transferred to the data latch circuit 9 via the interface 2, data bus 5, and interface 4.

On the other hand, since the text frequency circuit 11 outputs the printing clock PC given from the printing device 14 to the selector 12 as multiple types of frequency-divided clocks, the control circuit 13 has a magnification corresponding to the magnification previously calculated. When the signal ES is output to selector 12, selector 1
2 is a frequency division clock corresponding to this magnification signal ES,
In other words, the divided clock corresponding to the magnification calculated by the control circuit 13, specifically, when the magnification signal ES indicates equal magnification, the printing clock PC output from the printing device 14 is directly used. , the parallel/serial converter circuit 10 uses the 1/2 frequency divided clock when 2x is specified, the 1/3 frequency divided clock when 3x is specified as the multiplication clock EC, and so on. Output to.

The dot data of the image information transferred to the data latch circuit 9 is once latched by the data latch circuit 9, and then the magnification clock is applied from the selector 12 to the parallel/serial conversion circuit 10.
It is output to the printing device 14 as printing data in synchronization with EC.

FIG. 3 is a timing chart showing the state of capture of printing data in the printing device 14.

The printing data PD is taken in by the printing device 14 as follows. The capture clock GC for capturing the printing data PD is as shown in Figure 3e.
It is synchronized with the printing clock PC shown in FIG. 3a mentioned above and always has a constant cycle, and the printing device 14 takes in printing data PD in synchronization with the rising edge of this taking-in clock GC.

When printing without enlarging or reducing, in other words, at the same size, the printing clock should be set as shown in Figure 3a.
The control circuit 1 is a clock C1 with the same frequency as the PC.
3 and the parallel/
As shown in FIG. 3b, the parallel/serial conversion circuit 10
The printing data PD outputted to the printing device 14 from the printing device 14 is in one-to-one synchronization with the capture clock GC of the printing device 14 itself. Therefore, as shown in FIG. 3f, the printing data number n is the number N of the data printed by the printing device 14, the printing data number n+1 is the number N+1, and the printing data number n is the number N+2 of the data printed by the printing device 14.
+2... Since there is a one-to-one correspondence between the printing data transferred from the page memory 1 and the data printed by the printing device 14, the same size printing is performed without being enlarged or reduced. It will be done.

On the other hand, when enlarging printing with a magnification of 2x is performed, for example, as shown in FIG.
C2 is selected by control circuit 13 and selector 1
2 to the parallel/serial conversion circuit 10, the printing data PD output from the parallel/serial conversion circuit 10 to the printing device 14 is synchronized with the capture clock of the printing device 14 itself, as shown in FIG. 3d. It has become a double cycle. Therefore, Figure 3g
As shown in the figure, the printing data of the printing data number n is printed by the printing device 14 at numbers N and N+1, printing data number n+1 is printed at numbers N+2 and N+3, and so on from the page memory 1. Since there is a one-to-two correspondence between the transferred printing data and the data printed by the printing device 14, the image printed by the printing device 14 is doubled in the horizontal direction, that is, in the line length direction. The image is enlarged and printed.

For expansion in the vertical direction, that is, in the line arrangement direction, the control circuit 13 calculates the magnification by comparing the value y stored in the vertical display size register PYS and the value n stored in the vertical print size register CYS. , this is, for example, the same size (no enlargement or reduction)
In the case of printing, one scanning line is printed as one scanning line, and in the case of double printing, each scanning line stored in page memory 1 is printed twice (expanded three times). If so, it is sufficient to read the information from the page memory 1 three times (3 times) and print it.

〔effect〕

As described in detail above, according to the present invention, in an image processing device that is incorporated into an information file device or the like, an image obtained by enlarging and displaying a part of image information of an input document image on a display device is displayed. Since it is possible to print in an enlarged state, more diverse image processing is possible than in the past.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of the device of the present invention;
FIGS. 2a to 2c are schematic diagrams showing the state of the image processing, and FIGS. 3a to 3g are timing charts of the printing operation by the printing device. 1...Page memory, 3...Enlargement/reduction circuit,
7...Display memory, 8...CRT display,
11... Frequency divider circuit, 12... Selector, 13...
Control circuit, 14...printing device.

Claims (1)

[Claims] 1. An image memory for storing image information, a display device for enlarging and displaying a part of the image information stored in the image memory, and a mark for printing the image information. a display size register for storing the size of an image enlarged and displayed on the display device on the image memory in each of the main scanning direction and the sub-scanning direction of the display device; and a print size register for storing the sizes of the image information printed by the printing device in the main scanning direction and the sub-scanning direction of the display device, respectively, of the image displayed on the display device. The magnification of the size of the image information printed by the printing device with respect to the size on the image memory in the main scanning direction and the sub-scanning direction is determined based on the values stored in each of the registers, and the main scanning is performed according to the magnification. The control circuit includes a control circuit that outputs image information displayed on the display device to the printing device by expanding the length in the main scanning direction in the scanning direction and displaying scanning lines overlapped in the sub-scanning direction. An image processing device characterized by: