JPH086228A - Pixel scrambled image processing device - Google Patents

Abstract

(57) [Summary] [Object] To provide an image processing device capable of obtaining a printed matter that is not noticeable even if misregistration occurs during printing. A storage unit 6 for storing original image data, an instruction for designating a neighboring pixel pattern Pa for identifying a replacement candidate for a pixel of interest, and an instruction unit for designating a color to be processed. 2, and for the color designated by the instructing means, any one of the pixels corresponding to the neighboring pixel pattern Pa relating to the target pixel of the original image data is selected, and the pixel value of the selected pixel and the pixel value It is configured by the pixel replacement processing unit 12 that performs a process of replacing the pixel value of the target pixel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to image processing using a computer in a plate making process, and in particular, misregistration at the time of printing such as plate making of building material patterns such as wood grain, grain and stone. The present invention relates to an image processing apparatus and a printing method suitable for a printed matter in question. Also, the present invention
The present invention relates to printed matter in which misregistration is not noticeable.

[0002]

In the printing field of publications, cyan C
・ Magenta M, Yellow Y, and Sumi K process inks are used to represent a large number of colors. On the contrary,
In the field of building material printing that expresses patterns such as wood grain and grain, spot color printing is mainly used with spot color inks, but in terms of expressing many colors using multicolor inks, publications It is exactly the same as the printed matter of.

Here, a brief description of how a printed matter is made in building material printing is as follows. First,
The unit material B is created by performing the endless pattern creation process from the original image.
The process of creating the endless pattern E is performed. The outline of this process is shown in FIG. In FIG. 9, unit material B
Is original image data obtained by photographing a sample such as wood grain and performing color separation with a scanner. In addition, the endless pattern creation processing is to create an image in which the unit material B is arranged in a plane by repeating the unit material B several times in the vertical direction and the horizontal direction, and the image is surrounded by points P1, P2, P3, and P4. This is a process of cutting out a rectangular shape to create one endless pattern E. It should be noted that this process is a process using a computer, and the details thereof are described in, for example, Japanese Patent Laid-Open No. 4-212285.
No. 4 is described.

Next, repeat processing is performed. This repeat process is a process of repeating the endless pattern E created as described above in a predetermined manner. FIG. 10 is a diagram showing a mode of this repeat. As shown in FIG. 10 (A), a mode in which all endless patterns are regularly arranged (hereinafter referred to as “parallel feed”), and FIG.
As shown in (B), a mode (hereinafter, referred to as “half-pitch shift”) in which the endless patterns are shifted and arranged side by side is prepared. Then, the operator selects one of these modes to obtain a repeat-processed image. It should be noted that this processing is also processing using a computer, and details thereof are described in, for example, Japanese Patent Laid-Open No.
No. 100408. Then, the image data subjected to the repeat processing is supplied to a gravure engraving machine to create a printing plate (cylinder), and the gravure printing machine prints using this printing plate.

The above is a brief description until obtaining a printed matter. However, when printing with the gravure printing machine described at the end, misregistration may occur. However, as a function of the printing machine, it has a function of reading a register mark printed at a predetermined position or a predetermined shape for each color and controlling the compensator roller to suppress this register misregistration. The misregistration can be corrected in the printing process. However, in the case of a printed matter that requires high quality such as a building material pattern, there is a problem that the misregistration is conspicuous, and the misregistration must be dealt with even in the plate making process that is a preceding process of the printing process.

Conventionally, as a countermeasure against this misregistration, a process of blurring a color plate having a printing plate or all color plates as a whole has been performed. As an example of this processing, the above-mentioned endless pattern E (FIG. 9) has been subjected to processing for smoothing the pixel values of the target pixel as a whole by using a spatial filter processing.

[0007]

However, when the blurring treatment is carried out in this way, there are problems that the atmosphere of the pattern is changed and the detail of the pattern is damaged.
Therefore, an object of the present invention is to provide an image processing apparatus capable of obtaining an image in which misregistration is inconspicuous without performing blurring processing by spatial filtering processing that has been conventionally performed.

[0008]

[Means for Solving the Problems]

(1) The present invention has been made in view of the above problems, and in the invention according to claim 1, a storage unit that stores original image data and a neighboring pixel pattern Pa that specifies a replacement candidate for a pixel of interest are specified. An instruction for specifying the plate to be processed, an instruction means for giving an instruction for specifying the plate to be processed, and a pixel corresponding to the neighboring pixel pattern Pa relating to the pixel of interest of the original image data for the plate specified by the instructing means. A pixel scramble image processing apparatus is configured by selecting any one of them and performing a process of replacing the pixel value of the selected pixel with the pixel value of the pixel of interest. Pixel scrambling is used as a phrase that means pixel replacement.

(2) According to the second aspect of the invention, the storage means for storing the original image data, the instruction for designating the neighboring pixel pattern Pa as a replacement candidate for the pixel of interest, and the version to be processed are designated. Instruction, an instruction means for instructing a repeat mode of the endless pattern, an endless pattern creation processing section for creating the endless pattern image E using the original image data, and a plate designated by the instructing means. Regarding, regarding the repeat mode and the neighboring pixel pattern Pa, any one of the pixels corresponding to the neighboring pixel pattern Pa related to the target pixel of the endless pattern image E is selected, and the pixel of the selected pixel is selected. An image processing device is configured by a pixel replacement processing unit that performs a process of replacing the value and the pixel value of the pixel of interest.

(3) In the invention described in claim 3, in addition to the configuration of the invention described in claim 1 or claim 2, the pixel replacement processing unit finally uses this pixel replacement processing unit. With respect to all the pixels of the created image data, "the positional relationship between a certain pixel position and the pixel position in the original image is that of a certain pixel in the neighboring pixel pattern Pa and a target pixel in the neighboring pixel pattern Pa. Processing is performed under the condition that "there is a positional relationship".

(4) In the invention described in claim 4, in the step of obtaining the original image data and any one of the pixels corresponding to the neighboring pixel pattern Pa regarding the pixel of interest is selected and selected. An image processing method is constituted by a pixel replacement processing step of performing pixel replacement processing for replacing the pixel value of a pixel and the pixel value of the pixel of interest on at least one plate of the original image data.

(5) In the invention described in claim 5, for at least one version of the original image data, one of the neighboring pixels relating to a pixel of the original image data is selected, and the selected one is selected. The printed matter is printed based on the image data obtained by performing the pixel replacement process of replacing the pixel value of the pixel and the pixel value of the target pixel.

[0013]

[Action]

(1) According to the invention described in claim 1, the image data in which the pixel value of the pixel of interest is replaced by the pixel value of the pixel in the vicinity of the pixel of interest in the specific version of the original image by the pixel replacement processing unit. Will be created. Since the printed matter printed using this image data is familiar with the surrounding pixels, even if misregistration occurs during printing, the misregistration becomes inconspicuous.

FIG. 2 is an explanatory view for explaining this operation of the present invention. In FIGS. 2A and 2B, FIG. 2A and FIG. 2B show, for each color plate, a state in which a print position of each color is displaced when a normal image (that is, an image that has not been processed according to the present invention) is printed. Therefore, it is assumed that the pixels indicated by ◯ should be printed at the positions that originally match each other. Note that the unit of each pixel is □ in the figure, and for the sake of convenience, a binary image is shown as an example (of course, the actual image is a multivalued image), and the pixel of the vertical line or the horizontal line is “with pixel”. I mean. FIG. 2C shows a state in which the two images are printed in an overlapping manner. Since the misregistration by one pixel occurs in both the vertical and horizontal directions, the misregistration is clearly recognized.

On the other hand, FIGS. 2 (D) and 2 (E) show, for each color plate, a state in which the printing positions of the respective colors are displaced when the image on which the pixel replacement processing according to the present invention is performed is printed. It is assumed that the pixels indicated by ◯ should be printed at the positions that originally match each other. FIG. 2F shows a state in which these two images are printed in an overlapping manner. Although the misregistration is generated by one pixel in both the vertical and horizontal directions, the pixels near the boundary where the misregistration is noticeable are familiar with the surrounding pixels. Therefore, the misregistration is less noticeable than in FIG. 2 (C).

(2) The invention described in claim 2 also has an operation corresponding to the above-described pixel replacement processing section, and has the same operation as in claim 1. The invention described in claim 2 particularly takes into consideration the process for the endless pattern to be finally repeated, and the pixel replacement process is performed according to the mode of the repeat.

(3) In the invention described in claim 3, in addition to the operation of claim 1 or claim 2, all the pixels of the image data finally replaced and replaced by the pixel replacement processing section, Since the image is moved only within the neighboring pixel pattern Pa with respect to the original image, an image that does not disturb the atmosphere of the original image can be obtained.

(4) The invention according to claim 4 is an image processing method having a step corresponding to the processing operation of the above-described pixel replacement processing section, and a printed matter in which misregistration is not noticeable can be obtained.

(5) In the invention described in claim 5, it is a printed matter printed based on the image data obtained through the steps corresponding to the processing operation of the pixel replacement processing section.
The printed matter has no noticeable misregistration.

[0020]

EXAMPLES Examples of the present invention will be described in detail below. Description of Basic Operation First, the basic operation of the pixel replacement process described in the section of action will be described. FIG. 3 is a diagram for explaining the pixel replacement processing according to the present invention. FIG. 3 (A) is the image data to be processed, ◯ indicates each pixel, and each pixel indicated by × is Pixel replacement processing is performed. here,
Pixels marked with × to be processed will be referred to as “target pixel” below.
I will decide. In this pixel replacement process, the pixel value of the pixel of interest is replaced with one of its neighboring pixels. Although this neighboring pixel can be set as appropriate, in the present embodiment, as shown in FIG. 3D, 24 pixels around the pixel of interest will be described below as neighboring pixels. Here, the data specifying the neighboring pixels of the pixel of interest will be referred to as "neighboring pixel pattern Pa" hereinafter. Therefore, the principle of the present invention is to select one pixel from the pixels belonging to the neighboring pixel pattern Pa of the pixel of interest and exchange the pixel value of the pixel of interest with the pixel value of that pixel. Then, this pixel replacement process is performed for all pixels.

In this embodiment, the condition for all the pixels of the image data finally created by this pixel replacement process is that "the positional relationship between a certain pixel position and the pixel position in the original image is It is a positional relationship between a certain pixel in the neighboring pixel pattern Pa and a target pixel in the neighboring pixel pattern Pa. " In other words, this constraint means that "the pixel replacement process is performed on all the pixels of the original image so that the pixel position of the moving destination is within the neighboring pixel pattern Pa". According to this restriction, "for all pixels of the processed image data, a certain pixel position is within the pixel pattern Pa adjacent to the pixel position pixel of interest in the original image of that pixel", and the atmosphere of the original image is destroyed. It's difficult.

In the present embodiment, this pixel replacement process is carried out by using a computer, and in order to carry out this process at high speed, it has "processing status data" as described below. As for this processing status data, as shown in FIG. 3B, data indicating “1 (ON)” for pixels that have already undergone the replacement processing, and data indicating pixels that have not been subjected to the replacement processing, Data indicating “0 (OFF)” is prepared for each pixel of the original image data to be processed. Explaining the pixel replacement processing using this processing status data described above, when the replacement processing is performed for a certain target pixel (i, j), if the processing status data corresponding to the target pixel is OFF, the target pixel In the neighboring pixel pattern Pa of (i, j), the pixel whose processing status data is OFF is set as a replacement candidate pixel, and one is selected from the replacement candidate pixels. Then, the pixel values of the selected pixel and the pixel of interest are exchanged, and the processing status data is also turned on for the two exchanged pixels as shown in FIG. Note that the processing status data of the pixel of interest is O
If it is N, the pixel replacement process is not performed for the pixel of interest.

As described above, by using the processing status data, "a pixel that has been replaced once is not replaced again". As a result, the pixel that has been replaced once is not the replacement target again, so that it is not necessary to perform wasteful processing, and the pixel position within the predetermined pixel range (neighboring pixel pattern P
Since the movement can be made only within the range (a), the pixel replacement processing that does not disturb the atmosphere of the original image can be performed at high speed without the need to calculate the movement distance.

Description of Apparatus Configuration Next, an image processing apparatus having the above-described basic operation will be described. FIG. 1 is an apparatus configuration diagram for explaining an image processing apparatus according to the present invention. The image processing means 1 includes the above-mentioned pixel replacement processing, and will be described in detail in the processing operation. The input unit 2 is used by an operator to input a processing parameter required for causing the computer (image processing unit 1) to execute a predetermined process, and is composed of a keyboard or a pointing device. The data input from this input means will be described in detail in the explanation of the processing operation. The display control means 3 controls the display of the monitor 4 and includes a video RAM having a predetermined capacity according to the number of pixels of the monitor 4. Monitor 4 is color CR
Although it is composed of a display device such as T, it is desirable that it can display in high definition like HDTV. The output means 5 creates a printing plate using the image data processed by the image processing means 1. As this device, a gravure engraving machine that creates a gravure printing plate by opening cells in a gravure cylinder is used. As the output means 5, a peripheral device for producing a printing plate may be used, and therefore an output scanner for exposing a film to produce a film original plate may be used. The storage unit 6 is for storing image data to be processed, which is input from a scanner (not shown) and for storing image data processed by the image processing unit 1, and includes an internal disk and an optical disk. An external disk such as a magnetic disk is appropriately selected and used.

The image processing means 1 has an endless pattern creation processing section 11, a pixel replacement processing section 12 for performing the processing described with reference to FIG. 3, and a repeat processing section 13 for performing repeat processing. The pixel replacement processing unit 12 has the pixel replacement function described with reference to FIG. 3, but also has the function of selecting a replacement pixel according to the repeat mode (FIG. 10) of the endless image peculiar to the building material pattern. This process will be described later in the description of the processing operation. The processing content of the endless pattern creation processing unit 11 is exactly the same as the processing described with reference to FIG. Further, the processing of the repeat processing unit 13 is different from the conventional technique in that the image to be processed is the image processed by the pixel replacement processing unit 12 in this embodiment, and the processing content itself is as shown in FIG. This is exactly the same as the conventional technique described above.

Although not shown in the configuration of FIG. 1, a color separation scanner is required when printing is performed based on a document obtained by photographing a sample in building material printing. On the other hand, when the image drawing program installed in the computer directly obtains the image data equivalent to the image data color-separated by the scanner, the scanner is unnecessary.
Further, a sublimation transfer printer or the like may be connected to the configuration of FIG. 1 as a peripheral device in order to output the image processed by the image processing means 1 onto paper.

Description of Processing Operation Next, the processing operation in the above-described apparatus configuration will be described by taking as an example a plate-making printing process in building material printing in which a repeat process for repeating the endless pattern E is performed. FIG. 4 is a diagram for explaining the flow of the overall processing of this embodiment. FIG. 5 is a diagram for explaining the flow of the image processing of this embodiment, and in particular, the pixel replacement processing unit 12
6 is a diagram for explaining the processing operation of FIG. First, at the start of FIG. 4, the endless pattern E described with reference to FIG. 9 in the section of the prior art has already been created by the endless pattern creation processing unit 11.

At S1, the operator inputs an instruction for reading the endless pattern E to be processed and various processing parameters from the input means 2 such as a keyboard. Of these processing parameters, those important to the description of this embodiment are (a) to (c) shown below. (a) Neighborhood pixel pattern Pa (see FIG. 3D) (b) Plate to be processed (c) Repeat mode of endless image (see FIG. 10) This “(a) Neighborhood pixel pattern Pa” is replaced In this embodiment, as shown in FIG. 3D, there are two pixels in the vicinity of the pixel of interest. In addition, "(b) Version to be processed" is
This is data that specifies a plate for which pixel replacement processing is to be performed, and for example, "cyan plate only" is specified. The reason why this designation is necessary is that when the plate is divided into the pattern ground portion and the pattern element portion of the building material pattern, the pattern ground portion is subjected to pixel replacement processing only for the corresponding plate. This is because misregistration can be made inconspicuous by performing pixel replacement processing on a specific plate. However, more than one version may be specified, and in reality all versions can be specified. Here, the “plate” means the gradation data necessary for finally printing the printed matter with a certain color. This "plate" is gradation data for each color of cyan, magenta, yellow, and violet when printing in process colors, and is gradation data for each color including special colors when printing with special color ink. Also, "(c)
The mode of repeat in endless processing "is shown in FIG.
Although it is designated whether it is the "parallel feed" of (A) or the "half pitch shift" of FIG. 10 (B), it is also possible to designate "not repeat" in addition to this. I have to.

Next, in S2, the processing for the endless pattern E is performed in the pixel replacement processing section 12. This S2
The process will be described in detail with reference to FIG. First, in S11, one of the color plates selected in S1, for example, a cyan plate is selected. At S12, S out of the endless pattern E
The image data of the color plane selected in 11 is read. S13
, All the bits of the processing status data (Fig. 3) are turned off.
To That is, all pixels are initialized to be replaceable. Next, in S14, a pixel having the endless pattern E is selected, and the pixel is set as the pixel of interest (i, j). In the present embodiment, (i, j) is used as a parameter indicating the position of a pixel, where i and j are x (size) in the horizontal size of the image and y (size) in the vertical size. Takes a value from 0 to x (size) -1 and j takes a value from 0 to y (size) -1. The method of determining (i, j) in S14 may be appropriately selected such that j is fixed and i is incremented by one.

In S15, referring to the bit of the processing status data (i, j) of the pixel of interest (i, j), if OFF (indicates that replacement is possible without replacement), pixel replacement processing is performed. The processing of S16 to S18 is performed. If ON (replacement is indicated and replacement is unnecessary), the process is not necessary for the pixel of interest, and the following processes are skipped in S16 to S18. In S16, it is determined whether or not there is a replacement candidate pixel among the pixels corresponding to the neighboring pixel pattern Pa of the pixel of interest (i, j). In this embodiment, in S1, the neighboring pixel pattern P
Since a is described as two pixels in the vicinity of the pixel of interest, it is determined whether or not there are 24 pixels around the pixel of interest whose bits of the processing status data are OFF (replaceable). According to this determination, if even one bit of the processing status data is OFF (replaceable), the processing of S17 to S18 is performed to perform the pixel replacement processing. If not, S17 to S18 are skipped.

At S17, one of the replacement candidate pixels selected at S16 is selected using a random number, and the pixel of interest (i, j) and the selected pixel (i ', j') are selected. And replace. That is, the pixel values are exchanged. S1
At 8, the bit of the processing status data of the two pixels exchanged at S17 is turned on. That is, the bits of the processing status data (i, j) and the processing status data (i ′, j ′) are turned on (already replaced). When the processing operations of S14 to S18 are repeated for all pixels and the processing of all pixels is completed (S19), the processed image is written in the storage means (S20), and all the pixels designated in S1 are processed. When the color plate is finished (S21), the process is finished.

Here, regarding the way of taking the neighboring pixels when the target pixel is at the boundary, a special way is taken according to the repeat mode. This explanation will be given below, but this explanation relates to S16 to S17 described above. FIG. 6 is a diagram for explaining how to take the neighboring pixel pattern Pa when the pixel of interest is at the boundary portion, and is a diagram showing replacement candidate pixels when the neighboring pixel pattern Pa protrudes from the image. FIG. 6 (A) shows the case where the adjacent pixel pattern Pa is in the regions R1 and R when the pixel of interest indicated by x is at the right end in the case of parallel feed and in the case of shifting by half pitch.
It is 2 ”. When the repeat is not performed, the region R1 is set as the replacement candidate in S16 to S17 described above. However, in the endless image, the right end and the left end (or the upper end and the lower end) should be originally connected, so the right end and the left end. (Or top and bottom) should be treated as continuous. Therefore, not only the region R1 of the neighboring pixel pattern Pa is set as the replacement candidate pixel, but the portion of the neighboring pixel pattern Pa protruding to the right side is brought to the left side, and the region R2 is also set as the replacement pixel candidate in S16 to S17. Let's do the processing. As a matter of course, when the target pixel is at the left end, the neighboring pixel pattern Pa protruding to the left end is brought to the right end.

Similarly, in FIG. 6B, in the case of parallel feed, when the pixel of interest indicated by x is at the upper end, "the neighboring pixel pattern Pa is the regions R3 and R4".
It is shown that. In addition, FIG. 6C shows a case of shifting by a half pitch, and when the pixel of interest indicated by x is at the upper end, "the neighboring pixel pattern Pa is the regions R5, R6 and R".
7 ”. Further, FIG. 6D shows the case where the pixel is shifted by a half pitch, and when the pixel of interest indicated by x is at the lower end, "the neighboring pixel pattern Pa is the region R8.
And R9 and R10. " As described above, in S16 to S17, the pixel of interest (i,
When j) is near the boundary, processing is performed by the neighboring pixel pattern Pa according to the repeat mode.
This is the end of the description of S2 in FIG. 4 using FIG.

Next, in S3 of FIG. 4, repeat processing is performed using the endless pattern E'processed in S2 in accordance with the repeat mode designated in S1. That is, FIG.
As shown in 0, an image in which the endless pattern is repeated a predetermined number of times is created. Next, in S4, S is applied to the gravure engraving machine.
The image data created in 3 is supplied to create a gravure plate (cylinder) for each color. Next, in S5, printing is performed using the printing plate for each color created in S4 to print the building material pattern. This is the end of the description of the plate making process and the printing process for obtaining a printed matter from an original in building material printing.

Finally, the method of allocating the bits of the processing status data will be described. FIG. 7 is a diagram showing the structure of this processing status data. The processing status data requires one bit for each pixel, but in order to reduce the storage area used for the processing status data, the following is done. First, when the image size is x (pixel) x y (pixel), the ON / OFF of the processing status data corresponding to the pixel at the pixel position (i, j) of the original image is changed from the LSB of the m-th byte to the n-th bit. When the position is to be associated with m, m and n are calculated by the following calculation formula. However, A% B is the remainder when A is divided by B.

M = (j × x + i) / 8 n = 7− (j × x + i)% 8 In this case, the data size ds of the processing status data is “x
Xy / 8 + 1 (byte) ".

Although the embodiment up to the printing of the building material pattern has been described in detail above, this embodiment can be appropriately modified. First, the neighborhood pixel pattern Pa in the embodiment is as shown in FIG.
Although there are two pixels in the vicinity of the pixel of interest as shown in (D), the number of pixels may be set to an appropriate number of pixels.
It may be a pixel, and instead of setting with the number of pixels,
The shape may be set. FIG. 8 is an example of this neighboring pixel pattern Pa, FIGS. 8A to 8C are examples in which all the pixels around the pixel of interest are neighboring pixels, FIG. 8A is one neighboring pixel, and FIG. ) Is an example of two neighboring pixels, and (C) is an example of three neighboring pixels. FIGS. 8D and 8E are modified examples of FIGS. 8A and 8B and show an example of a neighboring pixel pattern Pa in which a pixel position located diagonally to the pixel of interest is restricted. is there. In FIG. 8F, only the pixel position in a specific direction is set as the neighboring pixel pattern Pa. When the direction of misregistration is known in advance, it is effective to specify the pixel position belonging to that direction as the neighboring pixel pattern Pa in FIG. 8F. The neighboring pixel pattern Pa can be set appropriately without being limited to these. In the present invention, the “neighboring pixel pattern” simply has a function of setting neighboring pixels.

When a printed matter having a resolution of 8 lines / mm is obtained, as shown in the example of the embodiment, the image data obtained by performing the image processing with the neighboring 2 pixels of the target pixel as the neighboring pixel pattern Pa. When printed with, the printed matter was of sufficient quality. Further, in the embodiment, the original image to be processed by the pixel replacement processing unit 12 is an endless image. However, the original image is not limited to the endless image, and may be a normal image used for printed publications. Of course, in this case, it is not necessary to repeat by the repeat processing unit 13.

In the embodiment, the pixel value of the image data to be handled has been described as the density value of the color of the ink used for printing, but RGB, which are the three primary colors of light, are used as the data expressing the color of the image. You may use the density value.
Therefore, the “plate” in the present invention also includes RGB density values. In this case, in order to obtain a printed matter, a processing step of converting RGB image data into CMYK is added. At this time, instead of converting into CMYK, conversion may be performed using a spot color plate. Further, in the embodiment, an example of performing gravure printing using a gravure engraving machine has been described, but instead of directly creating a printing plate,
You may output to a film and create a printing plate by a method such as conventional gravure.

Although the repeat processing unit 13 has been described as having the processing function of the image processing means 1 in the embodiment, holding a repeat-processed image requires a huge storage capacity, which is preferable. Since it does not exist, it is better to calculate this repeat process at the time of output from the gravure engraving machine 5. In this case, the repeat processing in the repeat processing unit 13 is not performed, and the image data relating to the endless pattern E and the data relating to the mode of repeat are input to the gravure engraving device 5, and the calculation is performed according to the repeat mode on the gravure engraving device 5 side. After that, make a gravure plate and print it. Further, in the present embodiment, the pixel replacement process is performed for all pixels, but the pixel replacement process may be performed after selecting pixels within a predetermined range as the processing target.

[0040]

According to the present invention, image data in which the pixel value of the pixel of interest is replaced with the pixel value of the pixel in the vicinity of the pixel of interest for a specific color of the original image is generated. The printed matter printed using the data will not be noticeable even if misregistration occurs in the printing process. According to the third aspect of the invention, it is possible to obtain an effective printed matter without misalignment without disturbing the atmosphere of the original image.

[Brief description of drawings]

FIG. 1 is a device configuration diagram for explaining an embodiment of an image processing device according to the present invention.

FIG. 2 is an explanatory diagram for explaining the operation of the present invention.

FIG. 3 is a diagram for explaining pixel replacement processing according to the present invention.

FIG. 4 is a diagram for explaining the flow of the overall processing of this embodiment.

FIG. 5 is a diagram illustrating a flow of image processing according to the present embodiment.

FIG. 6 is a diagram for explaining how to take a neighboring pixel pattern when the pixel of interest is at the boundary.

FIG. 7 is a diagram showing a structure of processing status data.

FIG. 8 is a diagram for explaining an example of a neighboring pixel pattern.

FIG. 9 is a schematic explanatory diagram of a process of creating an endless original image from a unit material.

FIG. 10 is a diagram showing a repeat mode.

[Explanation of symbols]

 1 image processing means 2 input means (keyboard etc.) 3 display control means 4 monitor (HDTV) 5 output means (gravure engraving machine) 6 storage means (magneto-optical disk)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ken Oshima 1-1-1, Ichigaya-Kagacho, Shinjuku-ku, Tokyo Within Dai Nippon Printing Co., Ltd. (72) Ieji Hashizume, Ichigaya-Kagacho, Shinjuku-ku, Tokyo No. 1-1 Dai Nippon Printing Co., Ltd. (72) Inventor Naoki Kawai 1-1-1 Ichigaya Kaga-cho, Shinjuku-ku, Tokyo Dai-ni Printing Co. Ltd. (72) Inventor Toshio Ariyoshi Tanikaga-cho, Ichigo Shinjuku, Tokyo 1-1-1 Dai Nippon Printing Co., Ltd. (72) Inventor Yu Okamoto 1-1-1 Ichigaya-Kagacho, Shinjuku-ku, Tokyo Dai Nippon Printing Co., Ltd. (72) Inventor Yoshio Sukegawa Miyoshi Iruma-gun Saitama Machi Takemazawa 331 Dainippon Total Process Building Materials Co., Ltd.

Claims (5)

[Claims] 1. A storage unit for storing original image data and a neighboring pixel pattern P for specifying a replacement candidate for a pixel of interest.
For the instruction for designating a, the instruction means for instructing the version to be processed, and the version designated by the instructing means, the neighboring pixel pattern Pa for the target pixel of the original image data is set. A pixel scrambled image having a pixel replacement processing unit that selects any one of the corresponding pixels and replaces the pixel value of the selected pixel with the pixel value of the pixel of interest. Processing equipment. 2. A storage unit for storing original image data, and a neighboring pixel pattern Pa as a replacement candidate for a pixel of interest.
, An instruction for designating a plate to be processed, an instruction means for instructing a repeat mode of an endless pattern, and an endless pattern for creating an endless pattern image E using the original image data. For the pattern creation processing section and the plate designated by the instructing means, based on the repeat mode and the neighboring pixel pattern Pa, the neighboring pixel pattern Pa relating to the target pixel of the endless pattern image E.
A pixel scrambled image, comprising: a pixel replacement processing unit that selects any one of the pixels corresponding to the above and replaces the pixel value of the selected pixel with the pixel value of the pixel of interest. Processing equipment. 3. The invention according to claim 1 or 2, wherein the pixel replacement processing unit is configured to perform a "certain pixel position" for all pixels of the image data finally created by the pixel replacement processing unit. And the pixel position of the pixel in the original image are the positional relationship between a certain pixel in the neighboring pixel pattern Pa and the target pixel in the neighboring pixel pattern Pa. " A pixel scrambled image processing device characterized by: 4. A step of obtaining original image data, selecting any one of pixels corresponding to a neighboring pixel pattern Pa relating to a target pixel, and selecting the pixel value of the selected pixel and the pixel value of the target pixel. An image processing method comprising: a pixel replacement processing step of performing pixel replacement processing for replacing at least one plate of the original image data. 5. For at least one version of original image data, one of neighboring pixels related to a certain pixel of the original image data is selected, and the pixel value of the selected pixel and the pixel value of the pixel of interest are selected. A printed matter printed on the basis of image data obtained by performing a pixel replacement process for replacing.