JPH05212909A - Printer device - Google Patents

Abstract

PURPOSE:To obtain a printer device capable of selecting a resolving power for a minimum moire in a short time without wasting various sorts of supplies. CONSTITUTION:A printer device 1 is provided with an external interface 100, an indication/input part 101, an image storage part 102, and an image forming part 103. Image data from the external interface 100 is stored in the image storage part 102. In the image forming part 103, in accordance with the data, an image of every stage of resolving power is formed. This image is divided into a plurality of blocks. One is selected out of the blocks and outputted with a plurality of resolving powers. By referring to the output result, a user can output the image with an optimum stage of resolving power. In addition, in the case of characters, characters of the number larger than those of the original can be outputted on a sheet of paper in a character gap/line gap reducing mode and a line feed/page feed ignoring mode without a collapse of characters caused by a high resolving power.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer device for eliminating the generation of striped patterns (moiré) when outputting an image, and a printer device which does not show a crushed character even when output at high resolution.

[0002]

2. Description of the Related Art Conventionally, a striped pattern (moire) sometimes occurs when a predetermined image is output by a printer. For example, in a binary printer, moire occurs due to the influence of a black and white dither filter. Further, when outputting an image read by a scanner, moire occurs due to the relationship between the sampling cycle of the scanner and the characteristic frequency in the original image. In addition, if you want to process the image in color, yellow,
Moire occurred when two halftone dots with different screen angles of magenta and cyan were overlapped. The printout in which this moire was generated was very unsightly in appearance and was a problem in terms of quality.

[0003]

Therefore, in order to eliminate the occurrence of the striped pattern, the binary printer is improved in the dither filter, or the pixels are virtually divided when changing from multi-value to binary. The filtering process such as "Yes" is performed. Further, in the case of color processing, processing for eliminating moire by giving a characteristic to the screen pattern is performed. However, in reality, it is not possible for the user to know whether or not moiré will actually occur unless the user once outputs it. Further, even in the same image, the occurrence state of moire differs depending on the printer used, and it has not always been easy to determine when moire will occur. Therefore, when high-quality output is desired, it is necessary to actually output according to the resolution of the printer. However, this work not only wastes the supply of paper and toner and power, but also takes a lot of time for the user to work. On the other hand, when outputting an image with a printer at a resolution higher than the initial setting value, the entire page is reduced in size. In addition, when a file with a large number of pages is output and selected, the number of sheets that are wasted eventually increases in proportion to the file.

SUMMARY OF THE INVENTION Therefore, a first object of the present invention is to provide a printer device which can select a resolution that can reduce moire most in a short time without wasting various supplies and power. A second object of the present invention is to provide a printer device capable of making revisions and confirmations of originals without wasting various supplies.

[0005]

According to a first aspect of the present invention, in a printer device, a data receiving means for receiving image data from the outside, a data storing means for storing the data received by the data receiving means, and An image forming means for forming the data stored in the data storing means at a resolution of any stage, an image specifying means for specifying a part of the image formed by the image forming means, and an image specifying means for specifying the image. An image output means for outputting an image is provided to achieve the first object. According to the second aspect of the invention, the printer device is provided with data receiving means for receiving image data from the outside, data storing means for storing the data received by the data receiving means, and data stored in the data storing means. An image forming means for forming a resolution at an arbitrary stage, and a first mode setting means for reducing the character spacing and line spacing of the image formed by the image forming means,
Line feed of characters of the image formed by this image forming means
The second object is achieved by providing second mode setting means for ignoring page breaks and image output means for outputting an image based on the settings of the first and second mode setting means.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A printer device according to an embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a block diagram of the printer device 1. In this printer device 1, image data, commands, etc. sent from the outside are fetched via the external I / F 100.
Further, a display / input unit 101 for displaying the status of the printer device 1 and various settings, an image storage unit 102 for storing image data, and an image forming unit 103 for actually forming an image as an output are provided. Are connected to the internal bus 104. Here, in order to make the printer device 1 have R-step resolution, the image forming unit 103 in the printer device 1 is controlled in three steps as shown in FIG. That is, first, the laser beam diameter is controlled. The laser diode drive circuit 110 causes the laser diode 11 to emit light. This light is collimated lens 11
The light is collimated at 2 and is emitted to the aperture 113.
Aperture control circuit 1 for controlling this aperture 113
The beam diameter sent to the polygon mirror 115 is modulated by 14.

The second control is the polygon mirror 11
5 controls the number of rotations of the motor, and the polygon motor control unit 116 performs modulation. The light reflected by the polygon mirror 115 is guided to the drum 118, which is a photoconductor, by a lens group 117 such as an f-θ lens. The third control modulates the number of rotations of the motor of the drum 118, and is performed by the drum motor control unit 119.
As shown in FIG. 3, when the resolution of FIG. 3 (a) output at the default resolution Rd is doubled, that is, when only the beam diameter is output in half, the output is as shown in FIG. 3 (b). Since the beam diameter is halved and there is a gap, each pixel is moved in the main scanning direction (X direction).
And the sub-scanning direction (Y direction). The polygon motor control unit 1 plays the role of packing (shift xp) in the X direction.
The modulation in 16 is in charge, and the drum / motor control unit 119 plays a role of packing (shift yd) in the Y direction. However, although the high resolution output is of high quality, the printing speed is reduced. Therefore, if the data does not require high resolution, it may be output with the low resolution.

FIG. 4 is a flow chart showing a processing procedure of the printer device according to the embodiment of the present invention. When the image is sent to the printer device, header information such as vertical and horizontal sizes is added to execute writing to the image storage unit 102 (hereinafter referred to as page memory) of the printer device. Referring to FIG. 5, the external I / O
The Y-direction writing start position ys and height Yh of header information sent through F100 (step 1) and the default resolution value Rd of the printer are held (step 2).

Next, the number of blocks M × N into which the image 121 in the page memory 120 is divided is input (step 3). In the example shown in FIG. 5, it is divided into 4 × 4, and in each block (122)
The block 123 is selected as in (1, 1) to specify the position (step 4). Here, L resolutions for outputting the blocks of the selected small area are selected (step 5). The height Yh in the Y direction, the block division number M, and the Y height desired to be formed, that is, the output size in the Y direction can be calculated from each resolution (step 6).

The height Bh of each block at the default resolution value Rd can be calculated by Yh / M. Therefore, if the selected resolution is L stages of R0, R1, ..., Output is L + 1 stages including Rd. page·
Since the height Ym of the memory depends on the maximum resolution of the printer, it is uniquely determined on the device. From each resolution, the magnification per side of the image is respectively the default resolution value Rd / each set resolution, and the required height Yo is: Yo = Bh.Rd (1 / Rd + 1 / Ro + 1 / R1 + ...). It is determined whether or not this exceeds the height Ym of the page memory (step 7), and if it exceeds (step 7; Y), a message indicating that the size is over is displayed to inform the user (step 8).

Here, it is judged whether the user wants the output (step 9), and if the user still wants the output (step 9; Y), the subsequent processing is continued and the output is stopped. In this case (step 9; N), the process returns to step 3 and resets. When outputting, the resolution data of L + 1 stages is sorted in reverse order, and P [i] (i = 0 to
L) is secured (step 10). From the head i = 0 of the secured array (step 11), the modulation state of the image forming unit 103 is set to P [i] (step 12). In this state, as shown in FIG. 6, the data of the designated block is output to the paper while synthesizing the resolution data (step 1
3). This process is repeated L + 1 times (steps 14 and 1).
5).

As a result, the default is output to 124, and the images at the respective resolutions are output in the sorting order such as 125 to 127 (step 16). Then, the user inputs the resolution again from this output (step 1
7) Set the printer to the set resolution (step 1
8) and output (step 19). At this point, a series of processing ends. In the present embodiment, the output form focusing on the Y direction has been described, but a two-dimensional image layout is possible based on the page memory width Xw in the X direction, the block size Bw, and the like. Further, instead of specifying a block, a window can be specified in the page memory for further flexibility. Similar to the positional relationship of the image with respect to the page memory, equivalent processing can be realized by designating the upper left coordinates, width and height of the window to be output.

Next, the processing of the second embodiment of the present invention will be described. FIG. 7 is a flowchart of the process.
A high resolution Rh is selected from the resolution Rd given by the initial value of the printer (step 20). Then, the mode of the desired output form is selected. In this mode, character and line spacing (CC, LC) is packed, line feed,
Some page breaks (LI, PI) are ignored (step 2)
1). Referring to FIG. 8, the normal output at the resolution Rh is shown in FIG.
In the case of (a), the output in each mode is the character spacing mode (b), the line spacing mode (c), the line feed disregard mode (d), and the page break disregard mode (e). You can also select multiple settings. Here, after selecting the mode, the image forming unit 103 is set to the resolution Rh (step 22). Then, the output is performed based on this mode (step 23), and the processing ends.

[0014]

According to the first aspect of the present invention, it is possible to output high-quality image data with the least influence of moire by utilizing the characteristics of the printer having a plurality of resolutions. According to the second aspect of the invention, by utilizing the characteristics of the printer having a plurality of resolutions, it is possible to easily select a large number of files. Further, it is possible to avoid wasting paper.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an arrangement of members for realizing a plurality of resolutions.

FIG. 3 is an explanatory diagram showing the output when the beam diameter is halved with respect to the original data.

FIG. 4 is a flowchart showing a processing procedure of an embodiment of the present invention.

5 is a second half of the flowchart of FIG.

FIG. 6 is an explanatory diagram showing an outline of image area designation.

FIG. 7 is an explanatory diagram showing an image output in one embodiment of the present invention.

FIG. 8 is a flowchart showing a processing procedure of a second exemplary embodiment of the present invention.

FIG. 9 is an explanatory diagram showing an output state processed in each single mode.

[Explanation of symbols]

 100 ... External interface 101 ... Display / input section 102 ... Image storage section 103 ... Image forming section 104 ... Internal bus 110 ... Laser diode drive circuit 111 ... Laser diode 112 ... Collimating diode 113 ... Aperture 114 ... Aperture control circuit 115 ... Polygon mirror 116 ... Polygon motor control section 117 ... Lens group 118 ... Drum 119 ... Drum motor control section 120 ... Page memory area 121 ... Image area 122 ... Block area 123 ... Selected block area 124 ... Output with default resolution Rd Image 125 ... image output at resolution R0 126 ... image output at resolution R1 127 ... image output at resolution R2

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B41J 5/30 Z 8907-2C

Claims (2)

[Claims] 1. A data receiving means for receiving image data from the outside, a data storing means for storing the data received by the data receiving means, and a data stored in the data storing means having an arbitrary resolution. Image forming means, an image specifying means for specifying a part of the image formed by the image forming means, and an image output means for outputting the image specified by the image specifying means. Printer device. 2. A data receiving means for receiving image data from the outside, a data storing means for storing the data received by the data receiving means, and data stored in the data storing means having a resolution of any stage. Image forming means and the space between the characters of the image formed by the image forming means.
First mode setting means for reducing the space between lines, and line feed / line feed of characters of an image formed by the image forming means.
A printer apparatus comprising: a second mode setting unit that ignores page breaks; and an image output unit that outputs an image based on the settings of the first and second mode setting units.