JP2003234892A - Image processor and its method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To cause changes when a print is copied, without using a special form on which a specific pattern is previously printed. <P>SOLUTION: A printing system 1 prints out a copy detecting pattern for generating a change such as a moire pattern in a 1st area of a print 2 when the print 2 is copied and prints out a normal pattern not generating such a change in the other area. The printing system 1 prints out printing contents such as texts, photographs and drawings on the print 2. When the prepared print 2 is read out by a scanner 32 and printed out by a low resolution printer 34 using a multi-line screen of resolution lower than that of a high resolution printer 30, a change such as the moire pattern is generated on a copy detecting pattern part of the print 2 and the print is judged as a copy. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus and method for generating a copy-detectable image.

[0002]

2. Description of the Related Art Various methods have been proposed for identifying printed matter such as securities copied by using a copying machine. For example, “Japanese Patent Laid-Open No. 2000-335075”
Japanese Patent Application Laid-Open No. 2000-263912 (References 1 and 2) describes a method of previously adding a pattern that develops a moire pattern to a printed matter when the copy is made, and generating the moire pattern in the copied matter of the printed matter. Disclose.

However, the methods disclosed in these documents require a special paper on which a special pattern is printed, and therefore cannot be used if such a paper is not available. In the above method, the dedicated paper is the third
If it gets into the hands of a person, the safety cannot be maintained. Therefore, it is difficult to use the above method for general consumers, small and medium-sized stores, etc. where such management may not be sufficient because it is necessary to manage the stock and security of dedicated paper.

Further, even if the above method is used to prevent fine copying such as adding information such as date and serial number to a printed matter by using a special pattern, a separate sheet is required for each of these information. So difficult. In addition, the above method cannot maintain the safety when the dedicated paper is in the hands of a third party. Further, the above-mentioned paper tends to be expensive because printing is costly and inventory / security management is required as described above.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and in the case where a printed matter is copied without using a special paper on which a special pattern is printed in advance. It is an object of the present invention to provide an image processing apparatus and a method therefor that cause a change in image quality. Further, the present invention provides a low-cost image processing apparatus and method that can omit inventory / security management when using a special paper preprinted with a special pattern when identifying a copy of a printed matter. The purpose is to Another object of the present invention is to provide an image processing apparatus and a method thereof, which can be used to identify a copy of a printed matter and can easily represent information such as date and serial number.

[0006]

In order to achieve the above object, an image processing apparatus according to the present invention is an image for adding at least a first image and a second image to generate a third image. In the processing device, when a print result in which the first image is printed at a first resolution is read and is printed at a second resolution lower than the first resolution, a change occurs,
A first addition processing means for adding the first image to at least a partial area of the third image; and a second addition processing means for adding at least a partial area of the third image.
Second addition processing means for performing additional processing on the image.

Preferably, the image processing apparatus further comprises third adding processing means for adding the fourth image to the third image.

[0008] Preferably, the first image has a moire pattern and a change in shading when screen-printed at the second resolution.

Preferably, the printing apparatus further comprises printing means for printing the third image at the first resolution.

Preferably, the first addition processing means adds the first image to the first area of the third image, and the second addition processing means adds the first image to the first area of the third image. The second image is added to the second region of the third image other than the first region.

Further, an image processing method according to the present invention is an image processing method for generating a third image in which at least a first image and a second image are added, and the first image is When the print result printed at the first resolution is read and a print result is printed at the second resolution lower than the first resolution, a change occurs, and at least a part of the area of the third image, The first image is added, and the second image is added to at least a partial area of the third image.

Further, the program according to the present invention comprises a third image to which at least the first image and the second image are added.
A program for generating the image of the first image, the print result of the first image printed at the first resolution is read, and a change occurs when the image is printed at the second resolution lower than the first resolution. A step of adding the first image to at least a partial area of the third image,
Causing the computer to perform a process of adding the second image to at least a part of the region of the third image.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION [Principle of the Invention] Hereinafter, embodiments of the present invention will be described. FIG. 1 is a diagram showing an image of a radial copy detection pattern 20 printed in high resolution.
FIG. 2 shows the image shown in FIG.
FIG. 6 is a diagram showing an image obtained by screen printing at a lower resolution than that.

Radial copy detection pattern 20 (FIG. 1)
Is a large number of straight lines 2 with a width of about 84 μm that extend radially from one center point and intersect each other at an angle 202 of about 2.5 °.
Including 00. Radial copy detection pattern 2 shown in FIG.
An image of 0 can be created using a commercially available personal computer and drawing software, and can be printed by a commercially available inkjet printer.

Radial copy detection pattern 2 shown in FIG.
When an image of 0 is copied using a parallel line screen of 200 lines and 90 degrees, a radial copy detection pattern 2 shown in FIG.
2 images are obtained. As can be seen by comparing FIGS. 1 and 2, no moire pattern or the like is found in the area 204 of the radial copy detection pattern 20 (FIG. 1), but in the radial copy detection pattern 22 (FIG. 2). , Area 20
In the area 224 (FIG. 1) corresponding to No. 4 (FIG. 1), the moire pattern and the change in shading are clearly recognized. The change in the moire pattern or the like in the area 224 of the radial copy detection pattern 22 (FIG. 2) is caused by the image shown in FIG. 1 and a line of 200 lines and 90 degrees used in the copying machine copying this image. It develops due to interference with the screen.

FIG. 3 is a diagram showing an image of the concentric copy detection pattern 24 printed in high resolution. Figure 4
FIG. 4 is a diagram showing an image obtained by scanning the image shown in FIG. 3 with a scanner and performing screen printing at a lower resolution than that of FIG. 3.

The concentric copy detection pattern 24 (FIG. 3) includes a large number of concentric circles 240 having a width of 168 μm and formed at intervals 242 of 168 μm centering on a common point. The image of the concentric copy detection pattern 24 shown in FIG. 3 is created by using, for example, a commercially available personal computer and drawing software in the same manner as the radial copy detection pattern 20 shown in FIG. It can be printed with an inkjet printer.

The image of the concentric copy detection pattern 24 shown in FIG. 3 is set to 20 as in the case shown in FIGS.
When copying using a parallel line screen with 0 lines and 90 degrees,
The image of the concentric copy detection pattern 26 shown in FIG. As can be seen by comparing FIG. 3 with FIG. 4, no moire pattern is recognized in the area 244 of the concentric copy detection pattern 24 (FIG. 3), but the concentric copy detection pattern 26 (FIG. 4). ), The area 264 (FIG. 3) corresponding to the area 244 (FIG. 3) clearly shows the moire pattern and the change in shading.

The moire pattern in the region 264 of the concentric copy detection pattern 26 (FIG. 4) is also the image shown in FIG. 3 and the 200 lines 90 degrees used in the copying machine copying this image. As a result of interference with the line screen of
It has been expressed. According to the present invention, when a print image having a pattern as shown in FIGS. 1 and 3 is read, and as shown in FIGS. 2 and 4, a change such as a moire pattern occurs when screen printing is performed at a lower resolution. It is possible to identify whether or not the printed matter is a copy of the printed matter after it is first printed.

Under the conditions illustrated in FIGS. 1 and 2, in the radial copy detection pattern 20 (FIG. 1), the line width of the straight line 200 is 42 μm to 168 μm, and the angle 202 is 2 ° to 3 °. It has been experimentally confirmed that, to some extent, a clear change is expressed in the region 224 (FIG. 2).

Under the conditions illustrated in FIGS. 3 and 4, in the concentric copy detection pattern 24 (FIG. 3), the line width of the concentric circles is 42 μm to 168 μm and the interval 242 is 168 μm to 294 μm. , Area 224
It has been experimentally confirmed that a clear change appears in (Fig. 4). 1 and 3 show the case where the copy detection patterns 20 and 22 are dark black for convenience of illustration, but texts, drawings, photographs, etc. (print contents) are printed in an overlapping manner. Therefore, it is preferable that the actual copy detection patterns 20 and 22 have a color other than black, such as blue and green with a light density that can be seen when copied, rather than black.

[Overall Configuration] FIG. 5 is a diagram illustrating a configuration of a printing system 1 according to the present invention and a configuration of a copying system 3 for copying a printed matter 2 printed by the printing system 1. As shown in FIG. 5, the printing system 1 includes a computer (PC) 10-1 and a high resolution printer 30 such as an inkjet printer or a laser printer. The copying system 3 includes a scanner 32, a computer 10-2 and a low resolution printing machine 34.

FIG. 6 exemplifies an image of a horizontal stripe pattern (normal pattern 5) including a large number of parallel straight lines which do not exhibit a change such as a moire pattern even when printed at high resolution and copied at low resolution. It is a figure. The horizontal striped pattern shown in FIG. 6 is suitable for use as a background of printed matter because it does not exhibit a change such as a moire pattern even when screen-printed at a low resolution.

By these components, the printing system 1
Is a copy detection pattern as illustrated in FIGS.
Also, a function to create a pattern (normal pattern; FIG. 6) that does not exhibit a change such as a moire pattern even when copied at a low resolution, and a copy detection pattern, a normal pattern and text / drawings / photos (print content) Realize the function to print in high resolution. Further, with these components, the copying system 3 realizes a function of reading the printed matter 2 created by the printing system 1 and printing by using a parallel line screen having a resolution lower than that of the printing system 1.

[Computer 10] FIG. 7 is a diagram illustrating a configuration of the computer 10 shown in FIG. As shown in FIG. 7, the computers 10-1 and 10-2 (the reference numerals “10-1 and 10-2” are also simply referred to as the reference numeral “10”) are P including the CPU 102 and the memory 104.
C body 100, a display / input device 16 including a CRT display device / keyboard, a peripheral device interface (peripheral device IF) 12 that provides an interface function with the high-resolution printer 30 (FIG. 5), and a CD device. A recording device 14 including an HDD and the like. That is, the computers 10-1 and 10-2 include the components as a general computer.

[Print Program 4] FIG. 8 shows a copy detection pattern (FIGS. 1 and 2) and a normal pattern 5 on a print sheet.
FIG. 6 is a diagram showing a configuration of (FIG. 6) and a print program 4 for printing print content. The print program 4 is supplied to the computer 10-1 (FIGS. 5 and 7) of the printing system 1 (FIG. 5) via the recording medium 140, loaded into the memory 104 and executed, for example. As shown in FIG. 8, the print program 4 includes an image input unit 400, a print content storage unit 420, a normal pattern storage unit 422, a copy detection pattern storage unit 424, a mask storage unit 426, an image selection unit 430, and an image composition unit. 432 and image output unit 4
It is composed of 34. Among these functions of the printing system 1, the print program 4 prints the copy detection pattern (FIGS. 1 and 3), the normal pattern 5 (FIG. 6), and the print content on the printing paper with high resolution. , Performs processing for realizing the function for creating the printed matter 2.

The image input section 400 includes a copy detection pattern (for example, copy detection pattern) created by, for example, drawing software (not shown) executed on the computer 10-1 (FIGS. 5 and 7). A portion of the region 204 of the pattern 20, hereinafter also simply referred to as a copy detection pattern 20; FIG. 1), a normal pattern (for example, a normal pattern 5; FIG. 6) and a mask pattern (described later with reference to FIG. 9) are accepted. Each of these patterns is stored in the copy detection pattern storage unit 424 and the normal pattern storage unit 422.
And to the mask storage unit 426.
The image input unit 400 also receives print content supplied to the computer 10-1 via the recording medium 140 and outputs the print content to the print content storage unit 420, for example.

FIG. 9 is a diagram exemplifying an area 280 for the normal pattern 5, an area 282 for the copy detection pattern 20, and an area 284 where the print content is printed, which are provided in the printed matter 2 shown in FIG. The mask pattern is not printed because the normal pattern 5 is masked in the printed matter 2 (FIG. 5), and instead, the copy detection pattern 2 is used.
An area 282 in which 0 is printed is shown.

The print content storage unit 420 stores the print content input from the image input unit 400 and outputs it to the image composition unit 432.

The normal pattern storage unit 422 stores the normal pattern 5 input from the image input unit 400 and outputs it to the image selection unit 430.

The copy detection pattern storage unit 424 stores the copy detection pattern 20 input from the image input unit 400 and outputs it to the image selection unit 430.

The mask storage unit 426 is used by the image input unit 400.
The mask pattern input from is stored in the image selection unit 4
Output to 30.

The image selection section 430 is provided with a mask storage section 426.
Either the copy detection pattern 20 (FIG. 1) or the normal pattern 5 is selected on the basis of the mask pattern input from, and output to the image synthesizing unit 432. That is, the image selection unit 430 adds the copy detection pattern 20 to the area 282 (FIG. 9) of the printed matter 2 and adds the normal pattern 5 (FIG. 6) to the other areas 280. , The copy detection pattern 20 or the normal pattern 5 is selected.

The image synthesizing section 432 is provided in the area 28 of the printed matter 2.
A normal pattern 5 (FIG. 6) is added to 0 (FIG. 9), and the area 2
The copy detection pattern 20 (FIG. 1) is added to 82, and images are combined so that the normal pattern 5 or the copy detection pattern 20 is printed on the entire surface of the printed matter 2. further,
The image composition unit 432 uses the designated area 284 (FIG. 9).
Then, the print contents are superimposed and added, and the result of the combination is output to the image output unit 434. Specifically, the image composition unit 432 compares the pixel value of the copy detection pattern 20 or the normal pattern 5 with the pixel value of the print content for each of the pixels included in the area 284, and the value of these is determined. By selecting one of the larger ones, the normal pattern 5, the copy detection pattern 20, and the print content are combined and combined with the image printed on the printed matter 2.

The image output unit 434 is used for the peripheral equipment IF 12
The high resolution printer 30 (FIG. 5) is controlled via (FIG. 7), and the image combined by the image combining unit 432 is printed on the printing paper with high resolution.

[Overall Operation] The operation of the printing system 1 and the copying system 3 will be described below as a whole. In response to the user's operation, the computer 10-1 (FIG. 5)
The copy detection pattern 20 (FIG. 1), the normal pattern 5 (FIG. 6) and the mask pattern are created, and the recording medium 1
Accept print content via 40. The print program 4 (FIG. 8) running on the computer 10-1 is
Area 282 of printed matter 2 (FIG. 5) indicated by the mask pattern
In FIG. 9, the copy detection pattern 20 is added, the normal pattern 5 is added to the other area 280, and either the copy detection pattern 20 or the normal pattern 5 is added to the entire surface of the printed matter 2. Combine images.

Further, the print program 4 adds the print content to the area 284 which is designated for each print content and should be printed in the printed matter 2, and creates an image to be printed on the printing paper. The print program 4 controls the high resolution printer 30 (FIG. 5) via the peripheral device IF 12 (FIG. 7),
Print the created image on printing paper.

When the normal pattern 5 and the copy detection pattern 20 are printed lightly with the same color and density in the areas 280 and 282, respectively, the copy detection pattern 20 is printed on the printed matter 2 itself. Since it becomes difficult to identify with the naked eye, the copy detection pattern 20 can be added to the printed matter 2 as a latent image. By the operation of the printing system 1 described above, as shown in FIG. 9, the copy detection pattern 20, the normal pattern 5 and the print content are printed on the printing paper, and the printed matter 2 is created.

When another user operates the computer 10-2 to read the printed matter 2 created as described above with the scanner 32 of the copying system 3 (FIG. 5) and print it with the low-resolution printing machine 34. Area 28 of printed matter 2
2 (FIG. 9) and copy detection pattern 20 (FIG. 1)
2 and the region 204 change such as a moire pattern as shown in FIG. On the other hand, even if the printed matter 2 is copied by the copying system 3, the normal pattern 5 attached to the area 282 does not change. Therefore, a person who looks at the printed matter 2 finds that the printed matter having a change such as a moire pattern in the area 282 is
A printed matter that is a duplicate of the printed matter 2 and has no change such as a moire pattern in the area 282 can be determined to be the printed matter 2 that is not copied after being created by the printing system 1 (FIG. 5). .

[Modification] FIG. 10 is a view showing a modification of the radial copy detection pattern. FIG. 11 is a diagram showing a modification of the concentric copy detection pattern. In addition,
Instead of the copy detection pattern 20, a part (the area 204 shown in FIG. 1) of the copy detection pattern 20 (FIG. 1) is
It is also possible to use a combination of copy detection patterns as shown in FIG. Similarly, instead of the copy detection pattern 22 (FIG. 3), a copy detection pattern obtained by combining a part of the copy detection pattern 22 (the area 244 shown in FIG. 3) as shown in FIG. 11 is used. Is also possible.

Further, the copy detection patterns 20 and 22
It is also possible to use (FIGS. 1 and 3) and the copy detection patterns shown in FIGS. 10 and 11 in combination.
Since the copy detection pattern causes a change such as a moire pattern due to the interference with the parallel line screen of the copy system 3, the copy detection pattern 20 and the area 20 of the copy detection pattern 22 are simply changed.
Even if the pattern of 4,244 is added to the printed matter 2,
Depending on the scanning direction in the copying system 3, the moire pattern may not change. In contrast,
Since the copy detection patterns shown in FIGS. 10 and 11 are combined in various directions, no matter what direction the copy system 3 scans, a change such as a moire pattern may occur in the copy. Can be expressed.

FIG. 12 is a diagram showing a modification of the area to which the copy detection pattern is added in the printed matter 2 (FIGS. 5 and 9). Further, the shape of the area for embedding the copy detection pattern does not have to be a quadrangle like the area 282 shown in FIG. 9, and as illustrated in FIG. 12, there is an area where a change such as a moire pattern occurs when copying. "Gizou (counterfeit)"
One or more characters such as may be shaped.

When the area 282 (FIG. 9) is shaped so as to form characters when copied in this manner, the printed matter can be printed even for a person who does not know that a change such as a moire pattern will occur when the area is copied. Can be indicated as to whether or not it has been copied. Even if the area 282 does not have such a character shape, even if the print content includes a sentence such as "counterfeit when the background is disturbed", a change such as a moire pattern may occur when copied. It can be shown to those who do not know whether or not the printed matter has been copied. Further, the shape of the area 282 may be a character shape that warns against forgery, and the print content may further include a sentence such as “counterfeit if the background is disturbed”.

Further, the shape of the area 282 may be a shape of a character indicating the serial number, the manufacturing date, or the issuing date of the printed matter 2. Further, the shape of the area 282 may be a character shape indicating the serial number / manufacturing date of the printed matter 2 or the date of issue, and the print content may include a sentence indicating these pieces of information.

Although the case where the copy detection pattern 20 or the normal pattern 5 exists on the entire surface of the printed matter 2 has been described above, the copy detection pattern 20 and the normal pattern 5 may overlap on the printed matter 2. Further, there may be a region where neither the copy detection pattern 20 nor the normal pattern 5 exists. The copying system 3 (FIG. 1) includes a scanner 32, a low resolution printing machine 34, and
It may be a general copying apparatus that integrally includes a control device that controls these.

[Effect] According to the printing system 1 described above, the serial number of the output image, the manufacturing or issuing date, etc. can be printed on the latent image pattern or characters or images that are the main image, and the database is used. Management can be facilitated. Further, according to the printing system 1, it is possible to provide at low cost an apparatus that can accurately determine whether illegal copying has been performed using a copying machine or the like. Further, since the printing system 1 can print the print content, the copy detection pattern 20 and the normal pattern 5 at the same time, the printing system 1 can flexibly deal with the case where the printed matter 2 is a small number and many kinds.

Further, since the printing system 1 can print the printed matter having the anti-counterfeit image on demand, it is not necessary to secure the inventory of the anti-counterfeit paper and prevent security such as theft prevention. Further, since the printing system 1 can individually print the manufacturing number, the manufacturing date, the issuing date, etc., it becomes easy to manage the database of such information, and it is possible to achieve the effect of guaranteeing the original document and preventing forgery.

[0048]

As described above, according to the image processing apparatus and the method thereof according to the present invention, a change occurs when a printed matter is copied without using a special paper sheet on which a special pattern is printed in advance. Can be made. Further, according to the image processing apparatus and the method thereof according to the present invention, when identifying a copy of a printed matter, it is possible to omit inventory / security management when using a special paper preprinted with a special pattern, and Low cost. Further, according to the image processing apparatus and the method thereof according to the present invention, it is possible to easily represent the information such as the date and the manufacturing number by using the pattern for identifying the copy of the printed matter.

[Brief description of drawings]

FIG. 1 is a diagram showing an image of a radial copy detection pattern printed at high resolution.

FIG. 2 is a schematic diagram showing the image shown in FIG.
It is a figure which shows the image screen-printed with lower resolution than.

FIG. 3 is a diagram showing an image of a concentric copy detection pattern printed in high resolution.

FIG. 4 is a schematic diagram showing the image shown in FIG.
It is a figure which shows the image screen-printed with lower resolution than.

FIG. 5 is a diagram illustrating a configuration of a printing system according to the present invention and a configuration of a copying system for copying a printed matter 2 printed by the printing system.

FIG. 6 is a diagram illustrating an image of a horizontal striped pattern (normal pattern) including a large number of parallel straight lines that do not exhibit a change such as a moire pattern even when printed at high resolution and copied at low resolution.

FIG. 7 is a diagram illustrating a configuration of the computer shown in FIG.

FIG. 8 is a diagram showing a configuration of a print program for printing a copy detection pattern (FIGS. 1 and 2), a normal pattern (FIG. 5), and print content on a print sheet.

9A and 9B are diagrams exemplifying an area for a normal pattern, an area for a copy detection pattern, and an area on which print contents are printed, which are provided in the printed matter shown in FIG.

FIG. 10 is a diagram showing a modification of a radial copy detection pattern.

FIG. 11 is a diagram showing a modified example of a concentric copy detection pattern.

FIG. 12 is a diagram showing a modified example of a region to which a copy detection pattern is added in a printed matter (FIGS. 5 and 9).

[Explanation of symbols]

1 ... Printing system 10, 10-1, 10-2 ... Computer 100 ... PC main body 102 ... CPU 104 ... Memory 12 ... Peripheral device IF 14 ... Recording device 140 ... ..Recording medium 16 ... Display / input device 2 ... Printed matter 20, 22, 24, 26 ... Copy detection pattern 5 ... Normal pattern 200 ... Straight line 202 ... Angles 204, 224 , 244, 264, 280, 282, 2
84 ... Area 240 ... Concentric circles 242 ... Interval 30 ... High resolution printer 32 ... Scanner 34 ... Low resolution printer 4 ... Printing program 400 ... Image input section 420 ... ..Printed content storage unit 422 ... Normal pattern storage unit 424 ... Copy detection pattern storage unit 426 ... Mask storage unit 430 ... Image selection unit 432 ... Image synthesis unit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H04N 1/40 G03G 21/00 554 5C077 (72) Inventor Mario Fuse 430 Sakai, Nakai-cho, Ashigara-gun, Kanagawa Prefecture Green Tech Naka Kai Fuji Xerox Co., Ltd. (72) Inventor Hideki Fukunaga 430 Sakai, Nakai-cho, Ashigaragami-gun, Kanagawa Green Tech Naka Kai Fuji Xerox Co., Ltd. F term (reference) 2C187 AC07 AC08 AD04 BF34 BF60 BH18 CC08 DB21 2H134 NA15 NA24 NA26 5B021 AA01 AA19 NN00 5B057 AA11 BA02 CB19 CC03 CE08 DA06 DC01 5C076 AA14 AA16 AA21 AA22 BA05 5C077 LL14 MP02 PP20 PP23 PP55 PQ08 TT02 TT06

Claims (7)

[Claims] 1. An image processing apparatus for additionally processing at least a first image and a second image to generate a third image, the print result of printing the first image at a first resolution. Is read, and a change occurs when printed at a second resolution lower than the first resolution, and the first image is added to at least a partial area of the third image. An image processing apparatus comprising: a first addition processing unit; and a second addition processing unit that adds the second image to at least a partial area of the third image. 2. The image processing apparatus according to claim 1, further comprising a third addition processing unit that adds a fourth image to the third image. 3. The image processing apparatus according to claim 1, wherein the first image causes a moire pattern and a change in shading when screen-printed at the second resolution. 4. The image processing apparatus according to claim 1, further comprising a printing unit that prints a third image at the first resolution. 5. The first addition processing means adds the first image to the first area of the third image, and the second addition processing means adds the third image to the third area. The first of the images of
The image processing apparatus according to claim 1, wherein the second image is added to a second area other than the area. 6. An image processing method for generating a third image to which at least a first image and a second image are added, wherein the first image is printed at a first resolution. When the result is read and changed at the second resolution lower than the first resolution, a change occurs, and the first image is added to at least a partial area of the third image. An image processing method, wherein the second image is added to at least a partial area of the third image. 7. A program for generating a third image in which at least a first image and a second image have been subjected to additional processing, and a print result in which the first image is printed at a first resolution. A change occurs when the image is read and printed at a second resolution lower than the first resolution, and the first image is added to at least a partial area of the third image. , A step of adding the second image to at least a part of the region of the third image, the program being executed by a computer.