JP2001205917A - Halftone dot printed matter and its printing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To impart a forgery preventive function and a machine-reading function to a continuous gradation image. SOLUTION: As a halftone region to print halftone dots, two kinds of halftone regions, an m×m pixel (m>=2, m is an integer) and an n×n pixel (1<=n<m, n is an integer), are provided. Then, four halftone regions of the m×m pixels, which are in regions being independent from each other, surround the periphery of one halftone region of the n×n pixel without a gap, and the four halftone regions of the n×n pixels which are in regions being independent from each other are arranged with equal intervals along the outer periphery of the one halftone region of the m×m pixel for the constitution. Then, halftone dots which are obtained by image-processing a specified input image, and of which the duplication is difficult by a present photochemical processor, and at the same time, which can be machine-read are printed using both of the halftone regions of the two kinds of halftone regions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for printed materials, such as banknotes, passports, securities, cards, and valuable printed materials, which require forgery prevention and falsification prevention functions.

[0002]

2. Description of the Related Art Forgery prevention techniques for securities include a method using fine lines such as a tint block, a color pattern, and a relief pattern, and a method using fine components such as minute characters. Basically, a pattern is formed by a set of music objects having a constant image width, and minute characters are arranged. For the patterns, countermeasures for preventing forgery and falsification can be taken in consideration of design properties such as securities design, and it is difficult to duplicate the same pattern by complicating the pattern. Also, by using colors that make extraction by a photoengraving device or reproduction by a copying machine difficult, or by creating moiré for the scanning input / output of a copying machine or scanner by forming a complicated curved image line, it is possible to prevent counterfeiting. Role has been raised. Furthermore, these patterns have been widely used as security designs, and at the same time, have been used for a long time as printed patterns having a monetary value including banknotes, stock certificates, and bonds. It is an important pattern as an impressive design.

[0003]

However, in recent years, the means of counterfeiting banknotes and securities tend to be diversified with the increase in image quality of color copiers and computerization of color plate making technology. In particular, the resolution of image input / output devices used in the printing industry has significantly improved, and thin lines and minute characters used in securities have been easily extracted. This suggests the possibility of not only forgery by the general commercial printing method having a four-color halftone dot structure but also more formal forgery using special color plates.

Accordingly, the present invention uses a halftone dot obtained by performing image processing on a predetermined input image, which is difficult to duplicate with a photoengraving apparatus and is machine-readable. A continuous tone image is printed to prevent forgery of a printed matter.

[0005]

Means for Solving the Problems A halftone dot printed matter of the present invention comprises:
When printing a halftone dot for expressing a continuous tone image, m × m is used as a halftone area for printing the halftone dot.
Pixel (m ≧ 2, m is an integer) halftone area and n
Two types of halftone regions of × n pixels (1 ≦ n <m, n is an integer) are provided, and the two types of halftone regions are arranged without overlapping each other, and are located in regions independent of each other. Four halftone areas of m × m pixels surround the halftone area of one n × n pixel without a gap, and one halftone area of four n × n pixels in independent areas is one. After forming the two types of halftone regions so as to be arranged at equal intervals along the outer circumference of the m × m pixel halftone regions, both types of halftone regions of the two types of halftone regions are used. The halftone dot is printed using an area.

Further, in the halftone printed matter of the present invention, in a predetermined area composed of the two types of halftone areas, one continuous tone is formed by using both types of halftone areas of the two types of halftone areas. A halftone dot for expressing a gradation image is printed, and one continuous gradation image is printed in the predetermined area.

Further, in the halftone dot printed matter of the present invention, in a predetermined area composed of the two types of halftone areas, one continuous floor is provided for each type of halftone area of the two types of halftone areas. A halftone dot for expressing a toned image is printed, and two continuous tone images are printed in the predetermined area.

Further, the halftone printed matter of the present invention can be obtained by using either one of two kinds of inks, which appear to be the same color to the naked eye under normal light but have different optical characteristics from each other. Printing a halftone dot for expressing a toned image, printing an area excluding the halftone dot for expressing the continuous tone image using the other ink of the two types of inks, and setting a predetermined viewing condition. Thus, the continuous tone image can be visually recognized, and the predetermined area is printed so as to be seen as a uniform color by the naked eye under normal light.

Further, the halftone dot printed matter of the present invention is characterized in that, in the predetermined area, any one of two kinds of inks which appear to be the same color with the naked eye under normal light but have mutually different optical characteristics. Is used to print a halftone dot for expressing either one of the two continuous tone images, and the other of the two types of ink is used to print the two continuous tone images. A halftone dot for expressing the other continuous tone image is printed, and the two inks have optical characteristics different from those of the two inks, but are made to match the two inks with the naked eye under normal light. An area excluding halftone dots for expressing the two continuous tone images is printed using visible ink, and one of the two continuous tone images is printed under predetermined viewing conditions. And the predetermined viewing condition and Wherein under a predetermined viewing condition comprising 2
The other continuous tone image of the one continuous tone image is made visible, and the predetermined region is printed so as to be seen as a whole by the naked eye under normal light.

Further, the halftone printed matter of the present invention is characterized in that the halftone dots printed on either one of the two types of halftone areas to represent the continuous tone image are any of the halftone areas described above. It is characterized in that it is a halftone dot obtained by internally blurring the inside of a contour of a predetermined input image corresponding to one type of halftone area.

The halftone printed matter of the present invention is characterized in that the halftone dots printed on either one of the two types of halftone areas to represent the continuous tone image are any of the halftone areas. It is characterized in that it is a halftone dot obtained by performing external blurring processing or external density dispersion processing on the outside of the outline of a predetermined input image corresponding to one type of halftone area.

Further, in the halftone printed matter of the present invention, in order to express the continuous tone image, the halftone area printed on one of the two types of halftone areas is any one of the halftone areas. This is a halftone dot obtained by internally blurring the inside of the contour of a predetermined input image corresponding to one type of halftone region, and internally sharpening the intersection of image lines of the predetermined input image. It is characterized by:

In the halftone printed matter of the present invention, the halftone area printed in one of the two types of halftone areas to represent the continuous tone image is the halftone area. The inside of the contour of the predetermined input image corresponding to the one type of halftone region is internally blurred, and the outside of the contour of the predetermined input image is externally blurred or subjected to external density dispersion processing using halftone dots. It is characterized by having.

In the halftone printed matter of the present invention, the halftone area printed in one of the two types of halftone areas to represent the continuous tone image is one of the halftone areas. The inside of the outline of the predetermined input image corresponding to the one type of halftone region is internally blurred, and the point of intersection of the object line of the predetermined input image is internally sharply blurred to obtain the outline of the predetermined input image. It is characterized in that it is a halftone dot obtained by performing external blurring processing or external density dispersion processing on the outside.

Further, in the halftone printed matter of the present invention, in order to express the continuous tone image, the halftone area printed in one of the two types of halftone areas is any one of the halftone areas. External blur processing or external density dispersion processing is performed on the outline of a predetermined input image corresponding to one type of halftone area, and a density zero area of several pixels is assigned to the outline area of the predetermined input image. It is characterized by a halftone dot.

In the halftone printed matter of the present invention, the halftone dots printed on either one of the two types of halftone areas to represent the continuous tone image may be any one of the halftone areas. The inside of the outline of the predetermined input image corresponding to the one type of halftone region is internally blurred, and the outside of the predetermined input image is externally blurred or subjected to external density dispersion processing to obtain the outline of the predetermined input image. It is characterized in that it is a halftone dot obtained by assigning a zero density area of several pixels to the area.

In the halftone printed matter of the present invention, the halftone area printed in one of the two types of halftone areas to represent the continuous tone image is one of the halftone areas. The inside of the outline of the predetermined input image corresponding to the one type of halftone region is internally blurred, and the point of intersection of the object line of the predetermined input image is internally sharpened, and the outside of the predetermined input image is processed. Are subjected to external blurring processing or external density dispersion processing, and are halftone dots obtained by assigning a zero density area of several pixels to the contour area of the predetermined input image.

Further, the halftone dot printed matter of the present invention is a halftone area used for expressing the continuous tone image, the halftone area being of the other type excluding any one of the halftone areas. The halftone dot printed on the area is a halftone dot obtained by internally blurring the inside of the outline of a predetermined input image corresponding to the other type of halftone area.

The halftone print of the present invention is a halftone area used for expressing the continuous tone image, and is a halftone area of the other type excluding any one of the halftone areas. The halftone dots printed in the region are halftone dots obtained by performing external blur processing or external density dispersion processing on the outside of the outline of the predetermined input image corresponding to the other type of halftone area, I have.

The halftone print of the present invention is a halftone area used for expressing the continuous tone image, and the halftone area of the other type excluding any one of the halftone areas. A halftone dot printed on the area internally blurs the inside of the contour of the predetermined input image corresponding to the other type of halftone area, and internally sharpens the intersection of the image lines of the predetermined input image. It is characterized by being a halftone dot obtained by performing

The halftone dot printed matter of the present invention is a halftone area used for expressing the continuous tone image, the halftone area being the other halftone area excluding the one halftone area. Halftone dots printed in the area internally blur the inside of the outline of the predetermined input image corresponding to the other type of halftone area, and externally blur or externally disperse the outline of the predetermined input image outside. It is characterized by being a halftone dot obtained by processing.

The halftone dot printed matter of the present invention is a halftone area used for expressing the continuous tone image, the halftone area being the other halftone area excluding one of the halftone areas. A halftone dot printed on the area internally blurs the inside of the contour of the predetermined input image corresponding to the other type of halftone area, and internally sharpens the intersection of the image lines of the predetermined input image. And
The image processing apparatus is characterized in that the predetermined input image is a halftone dot obtained by performing external blurring processing or external density dispersion processing on the outside of the contour.

Further, the halftone dot printed matter of the present invention is a halftone area used for expressing the continuous tone image, the halftone area being the other halftone area excluding one of the halftone areas. The halftone dots printed on the area are subjected to external blur processing or external density dispersion processing on the outline of the predetermined input image corresponding to the other type of halftone area, and a few pixels are added to the outline area of the predetermined input image. Is characterized by being a halftone dot obtained by assigning a zero density area.

Further, the halftone dot printed matter of the present invention is a halftone area used for expressing the continuous tone image, wherein the halftone area is the other halftone area excluding one of the halftone areas. Halftone dots printed in the area internally blur the inside of the contour of the predetermined input image corresponding to the other type of halftone area, and externally blur or externally disperse the outside of the predetermined input image. In addition, it is characterized by being a halftone dot obtained by assigning a zero density area of several pixels to an outline area of the predetermined input image.

The halftone print of the present invention is a halftone area used for expressing the continuous tone image, and the halftone area of the other type excluding any one of the halftone areas. A halftone dot printed on the area internally blurs the inside of the contour of the predetermined input image corresponding to the other type of halftone area, and internally sharpens the intersection of the image lines of the predetermined input image. And
It is characterized in that the predetermined input image is a halftone dot obtained by subjecting the outside of the predetermined input image to external blurring processing or external density dispersion processing, and allocating a zero-density area of several pixels to an outline area of the predetermined input image.

In the halftone dot printed matter according to the present invention, the predetermined input image may be a meaningful image including any of a trademark, a family crest, a logo mark, or a character, and an image including any of a circle, an ellipse, and a polygon. Or at least one of the images.

Further, the method for printing a halftone dot printed matter of the present invention comprises:
When printing a halftone dot for expressing a continuous tone image, m × m is used as a halftone area for printing the halftone dot.
There are provided two types of halftone areas: a halftone area of pixels (m ≧ 2, m is an integer) and a halftone area of n × n pixels (1 ≦ n <m, n is an integer). The halftone areas are arranged without overlapping each other, and the four m × m
A halftone area of pixels surrounds a single halftone area of n × n pixels without a gap, and four halftone areas of n × n pixels in one area independent of one another are m × m pixels. The two types of halftone regions are arranged so as to be arranged at equal intervals along the outer periphery of the halftone region, and the halftone region is formed by using both types of halftone regions of the two types of halftone regions. It is characterized by printing dots.

Further, the method for printing a halftone dot printed matter of the present invention is as follows.
In a predetermined area composed of the two types of halftone areas, halftone dots for expressing one continuous tone image are printed by using both types of halftone areas of the two types of halftone areas. And printing one continuous tone image in the predetermined area.

Further, the method for printing a halftone dot printed matter according to the present invention comprises:
In a predetermined region composed of the two types of halftone regions, a halftone dot for expressing one continuous tone image is printed for each type of halftone region of the two types of halftone regions, The method is characterized in that two continuous tone images are printed in the predetermined area.

Further, the method for printing a halftone dot printed matter of the present invention is as follows.
The circular dots corresponding to the m × m pixel halftone area are arranged in all the m × m pixel halftone areas, and the circular dots corresponding to the n × n pixel halftone area are all A black-and-white binary halftone image arranged in the n × n pixel halftone area and inverted circular dots obtained by inverting black and white of circular dots corresponding to the m × m pixel halftone area are all m × m pixels. A monochrome binary halftone image in which circular dots corresponding to the n × n pixel halftone areas are arranged in all the n × n pixel halftone areas while being arranged in the m-pixel halftone area Only a continuous black area is selected from the image obtained by the arithmetic processing, and a cell corresponding to the m × m pixel halftone area is selected. Is prepared, the mask is overlapped with the predetermined area so as to match the halftone area of the m × m pixels, and the halftone area of the n × n pixels is extracted from the predetermined area. By overlaying a mask obtained by inverting the black and white of the mask so as to coincide with the halftone area of the n × n pixels on the predetermined area, the m × m
By extracting halftone areas of pixels,
After dividing the predetermined area into two types of halftone areas, the halftone area of m × m pixels and the halftone area of n × n pixels, each type of halftone area corresponds to each halftone area. The method is characterized in that halftone dots for expressing one continuous tone image are printed for each type of halftone area, assigned to continuous tone images.

Further, the method for printing a halftone dot printed matter of the present invention comprises:
In the predetermined area, the continuous tone image is expressed using one of two kinds of inks having different optical characteristics, although they look the same color with the naked eye under normal light. Printing a halftone dot, printing an area excluding the halftone dot for expressing the continuous tone image using the other ink of the two types of inks, and printing the continuous tone image under a predetermined viewing condition. Are printed so that the predetermined area as a whole looks uniform in color with the naked eye under normal light.

Further, the method for printing a halftone dot printed matter according to the present invention comprises:
In the predetermined area, one of the two continuous tone images is formed by using one of two kinds of inks which appear to be the same color with the naked eye under normal light but have optical characteristics different from each other. A halftone dot for expressing one continuous tone image is printed, and a halftone dot for expressing the other continuous tone image of the two continuous tone images using the other ink of the two types of inks. And printing the two continuous tone images using an ink that has optical characteristics different from those of the two types of inks but looks similar to the two types of inks with the naked eye under normal light. An area excluding halftone dots for expression is printed, and one of the two continuous tone images can be visually recognized under a predetermined viewing condition, and a predetermined different from the predetermined viewing condition. Under the visual recognition conditions With the visible and the other continuous-tone image gradation image, it is characterized in that printed to look like the color matching of the predetermined area as a whole by the naked eye under normal light.

Further, the method for printing a halftone dot printed matter of the present invention comprises:
A halftone dot printed on one of the two types of halftone areas to represent the continuous tone image is a predetermined halftone area corresponding to the one of the types of halftone areas. Is a halftone dot obtained by internally blurring the inside of the outline of the input image.

Further, the method for printing a halftone dot printed matter of the present invention is as follows.
A halftone dot printed on one of the two types of halftone areas to represent the continuous tone image is a predetermined halftone area corresponding to the one of the types of halftone areas. Is a halftone dot obtained by subjecting the outside of the outline of the input image to external blurring processing or external density dispersion processing.

The printing method of the halftone dot printed matter of the present invention is as follows.
A halftone dot printed on one of the two types of halftone areas to represent the continuous tone image is a predetermined halftone area corresponding to the one of the types of halftone areas. Is a halftone dot obtained by internally blurring the inside of the outline of the input image and subjecting the intersection of the image lines of the predetermined input image to internal sharp blurring.

Further, the method of printing a halftone dot printed matter of the present invention comprises:
A halftone dot printed on one of the two types of halftone areas to represent the continuous tone image is a predetermined halftone area corresponding to the one of the types of halftone areas. Is characterized by being a halftone dot obtained by internally blurring the inside of the contour of the input image and externally blurring or externally dispersing the outside of the predetermined input image.

Further, the method for printing a halftone dot printed matter of the present invention comprises:
A halftone dot printed on one of the two types of halftone areas to represent the continuous tone image is a predetermined halftone area corresponding to the one of the types of halftone areas. The inside of the contour of the input image is internally blurred, the point of intersection of the image of the predetermined input image is sharpened internally, and the outside of the outline of the predetermined input image is subjected to external blurring processing or external density dispersion processing. It is characterized by being a halftone dot.

Further, the method of printing a halftone dot printed matter of the present invention is as follows.
A halftone dot printed on one of the two types of halftone areas to represent the continuous tone image is a predetermined halftone area corresponding to the one of the types of halftone areas. Is a halftone dot obtained by performing external blurring processing or external density dispersion processing on the outside of the outline of the input image and assigning a zero-density area of several pixels to the outline area of the predetermined input image.

Further, the method for printing a halftone dot printed matter of the present invention is as follows.
A halftone dot printed on one of the two types of halftone areas to represent the continuous tone image is a predetermined halftone area corresponding to the one of the types of halftone areas. The inside of the outline of the input image is internally blurred, the outside of the predetermined input image is externally blurred or subjected to external density dispersion processing, and a density zero area of several pixels is assigned to the outline area of the predetermined input image. It is characterized by a halftone dot.

Further, the method for printing a halftone dot printed matter of the present invention comprises:
A halftone dot printed on one of the two types of halftone areas to represent the continuous tone image is a predetermined halftone area corresponding to the one of the types of halftone areas. The inside of the outline of the input image is internally blurred, the point of intersection of the image of the predetermined input image is internally sharpened, and the outside of the predetermined input image is externally blurred or subjected to external density dispersion processing. Is characterized by being a halftone dot obtained by assigning a zero density area of several pixels to the contour area of the input image.

Further, the method for printing a halftone dot printed matter of the present invention
A halftone area used for expressing the continuous tone image, and a halftone dot printed on the other type of halftone area excluding the one type of halftone area is the other type of halftone area. Is a halftone dot obtained by internally blurring the inside of the contour of a predetermined input image corresponding to the halftone region of (1).

Further, the method for printing a halftone dot printed matter of the present invention comprises:
A halftone area used for expressing the continuous tone image, and a halftone dot printed on the other type of halftone area excluding the one type of halftone area is the other type of halftone area. Is a halftone dot obtained by performing external blurring processing or external density dispersion processing on the outside of the contour of a predetermined input image corresponding to the halftone region of (1).

Further, the method for printing a halftone dot printed matter of the present invention comprises:
A halftone area used for expressing the continuous tone image, and a halftone dot printed on the other type of halftone area excluding the one type of halftone area is the other type of halftone area. The inside of the outline of the predetermined input image corresponding to the halftone area of
The image processing apparatus is characterized in that the predetermined input image is a halftone dot obtained by performing an internal sharpening process at an intersection of image lines.

Further, the method of printing a halftone dot printed matter of the present invention comprises:
A halftone area used for expressing the continuous tone image, and a halftone dot printed on the other type of halftone area excluding the one type of halftone area is the other type of halftone area. The inside of the outline of the predetermined input image corresponding to the halftone area of
The image processing apparatus is characterized in that the predetermined input image is a halftone dot obtained by performing external blurring processing or external density dispersion processing on the outside of the contour.

Further, the method for printing a halftone dot printed matter of the present invention comprises:
A halftone area used for expressing the continuous tone image, and a halftone dot printed on the other type of halftone area excluding the one type of halftone area is the other type of halftone area. The inside of the outline of the predetermined input image corresponding to the halftone area of
The present invention is characterized in that halftone dots are obtained by subjecting an intersection of image lines of the predetermined input image to internal sharp blur processing and externally blurring or externally dispersing the outside of the contour of the predetermined input image.

Further, the method for printing a halftone dot printed matter of the present invention is as follows.
A halftone area used for expressing the continuous tone image, and a halftone dot printed on the other type of halftone area excluding the one type of halftone area is the other type of halftone area. The outside of the contour of the predetermined input image corresponding to the halftone area is subjected to external blurring processing or external density dispersion processing, and halftone dots obtained by allocating a density zero area of several pixels to the contour area of the predetermined input image. It is characterized by having.

Further, the method for printing a halftone dot printed matter of the present invention is as follows.
A halftone area used for expressing the continuous tone image, and a halftone dot printed on the other type of halftone area excluding the one type of halftone area is the other type of halftone area. The inside of the outline of the predetermined input image corresponding to the halftone area of
It is characterized in that the predetermined input image is a halftone dot obtained by subjecting the outside of the predetermined input image to external blurring processing or external density dispersion processing, and allocating a zero-density area of several pixels to an outline area of the predetermined input image.

Further, the method of printing a halftone dot printed matter of the present invention is as follows.
A halftone area used for expressing the continuous tone image, and a halftone dot printed on the other type of halftone area excluding the one type of halftone area is the other type of halftone area. The inside of the outline of the predetermined input image corresponding to the halftone area of
An internal sharpening process is performed at an intersection of image lines of the predetermined input image, an external blur process or an external density dispersion process is performed on the outside of the predetermined input image, and a density of several pixels is zero in an outline region of the predetermined input image. It is characterized by being a halftone dot obtained by allocating an area.

Further, the method for printing a halftone dot print of the present invention is as follows.
The predetermined input image is configured by a meaningful image including any of a trademark, a family crest, a logo mark, and a character and an image including at least any one of a circle, an ellipse, and a polygon. Features.

[0050]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the printing industry, halftone dots are always required to express halftones, that is, continuous tone images, in addition to black and white binary values on printing paper. This relies on the property that a human recognizes a group of fine points as one gradation when distinguishing shades visually. Since the technology for halftoning the continuous tone image has been led by a major stencil manufacturer, it has been impossible for users to freely create halftone dots. However, in the platemaking printing industry in recent years, the development of postscript language, which is one of the computer page description languages, and the spread of commercial application software based on postscript language have made it relatively easy to produce color prints that integrate characters and images. It can be easily created, and furthermore, with the spread of the postscript language, users can start to create halftone dots.

In the halftone dot creation method based on the PostScript language, a digital film recorder is used. In this digital film recorder, character, image or illustration data created by application software is created as page description data in PostScript language, and a set of black and white dots is created using a device called RIP (Raster Image Processor) or software RIP. (Bitmap) It is converted into an image and output to a photosensitive material with a high-density laser beam of 2000 to 5000 pixels per inch. The “pixel” used in this specification refers to an “image element” in which a minimum portion obtained by minutely dividing a continuous tone image is represented by black and white binary.

According to the halftone dot creation method using the digital film recorder or software RIP, for example, the amplitude modulation method regularly arranges pixels whose size changes uniformly with respect to the tone value of the document. become. The arrangement of the halftone dots created by the amplitude modulation method is determined by the manner in which the number of lines, the halftone dot angle, the halftone dot shape, or the shape of the pixel increases with an increase in tone value.

FIG. 2 shows a dot generation pattern of a general commercial print based on the PostScript language.
For example, a halftone area expressing a screen ruling of 60 lines / inch on a low resolution output device of 300 pixels per inch is 300/60 = 5 pixels, that is, 5 × 5 × 5.
5 pixel regularly arranged geometric grid
And 5 × 5 + 1 = 26 gradation expressions.

The halftone dot shape is managed by a mathematical function. In FIG. 3, the center axis of one halftone dot of 5 × 5 pixels is (0, 0), and addresses of individual grids are represented by numerical values from −1 to 1. Upon receiving the values of these coordinates, the mathematical function calculates a value from -1 to 1. This value becomes the priority of filling the pixels. Each grid in FIG. 3 is, for example, in the case of a mathematical function 1- (X ² + Y ² ), the address X, Y of each grid is represented by X of the mathematical function. , Y, the center 1 is painted first, then 0.75, then 0.5,. . . . . . , -1 and the numerical values are filled in ascending order. In addition, the same numerical value is arranged in some places except for the central numerical value 1, but the order between these numerical values depends on the computer built in the machine. If a mathematical function is used, a more complicated halftone dot shape can be created, and this is effective as a tone reproduction method for preventing forgery. However, this method requires proficiency in mathematical functions and the postscript language. For example, it is possible to use a mathematical function alone to create a designable arbitrary shape that has its own meaning, such as trademarks, family crests, symbol marks, and characters. There were limits to making.

Therefore, JP-A-11-268228 discloses, for example,
By giving a continuous tone image consisting of halftone dots obtained by performing image processing on one of the images shown in FIG. An object of the present invention is to provide a function of preventing an action beforehand and determining the assigned halftone dot by machine reading. According to this method, the tone of the continuous tone image is directly applied to each grid (grid) by computer image processing without using the mathematical function, thereby providing a degree of freedom in the halftone dot generation pattern. Can be.

FIG. 5 shows that one pixel of an arbitrary continuous tone image has 26 pixels.
FIG. 9 is a diagram for explaining a halftone dot creation method by taking, as an example, a case where there are 14 gradations among the gradations. In order to obtain a halftone dot generation pattern similar to that of FIG.
As shown in (1), a numerical value is assigned to each pixel corresponding to the number of gradations of the continuous gradation image, that is, 26 gradations. In order to express 14 gradations among the 26 gradations in FIG. 5 by halftone dots by directly applying 26 gradations to each grid, as shown in FIG. 6, the center 1 is first painted out, as shown in FIG. Then two, three,. . . . . . , 12, the pixels are filled in ascending order of numerical values of the pixels, and the pixels are sequentially filled up to a value 13 smaller than 14 gradations. In this way, the number of tones of the continuous tone image is directly applied to each grid of 5 × 5 pixels in length and width,
Pixels are filled in ascending order of the numerical values of the pixels up to the number of tones on each pixel of the continuous tone image to create a halftone dot. Here, FIG. 7 explains that free halftone dot creation is possible. As shown in FIG. 6 described above, when a halftone dot generation pattern in which pixels are painted outward from the center is changed, and when there are six gradations of brightness,
For example, a halftone dot of a face showing both eyes and a mouth appears.

By applying the above principle, Japanese Patent Application Laid-Open No. H11-268228
In FIG. 8, the image width of an arbitrary shape is modulated by blurring the image as shown in FIG. In FIG. 8, the horizontal and vertical directions when a part of the cross section subjected to the blur
The number of gradations is given to each grid of × 5 pixels.
In this case, the image becomes gradually thicker outward from the center of the line. In addition, as shown by a broken line in FIG. 9, an intersecting area inside the halftone dot image is blurred in an acute angle so that an image of an intersection area of an object line which is likely to occur at the time of printing as shown by Z1 in FIG. Prevent line collapse and improve readability and dot quality. Outside the halftone dot image, instead of blurring from the center of the grid to the surroundings,
As shown by Z2, by performing the density dispersion processing, the tone reproducibility from the middle of the continuous tone to the dark portion is improved. Further, as shown by Z3 in FIG. 10, the contour area of the halftone dot is assigned a density zero (FF) area of several pixels to give a gap that is not filled inside and outside, so that the bright part of the continuous tone image is obtained. Halftone dots can be recognized in the entire region from to the dark part, and the readability of the halftone dots is improved, and the halftone dots can be read mechanically. FIG. 11 shows a printed matter p obtained by using the technique disclosed in JP-A-11-268228. The characters can be observed even in the dark area while the thickness of the object line of the Japanese document "Ichi" gradually increases. As described above, according to the technology disclosed in Japanese Patent Application Laid-Open No. H11-268228, a designer can use a generally used personal computer and image processing software without using a special system according to a customer's order. It is possible to freely design a halftone dot, and a halftone dot obtained by performing image processing on a predetermined input image using the technology disclosed in Japanese Patent Application Laid-Open No. H11-268228 is copied by a copying machine or the like. Is difficult to do,
In addition, since it can be read by a machine, it functions effectively when expressing a continuous tone image of a forgery prevention printed matter.

However, this method is intended to represent one continuous tone image using one kind of halftone area, and when printing a halftone dot for expressing the continuous tone image, By providing two types of halftone areas that do not overlap each other as a halftone area for printing halftone dots without gaps, and printing halftone dots in both types of halftone areas of the two types of halftone areas. One continuous tone image or two continuous tone images could not be printed in a predetermined area. Here, when a plurality of halftone dots are assigned to one halftone area, the halftone dot size itself becomes large, and it becomes difficult to increase the number of lines (image density). In the printed matter p 'in FIG. 12, the gradation is expressed while the thickness of the image of the Japanese document "printing bureau" gradually increases. Further, in the printed matter p ″ of FIG. 13, the gradation is expressed while the thickness of the image line of the Japanese document “copy prohibited” gradually increases, but in both cases shown in FIG. 12 and FIG. The diameter itself becomes large, and it becomes difficult to increase the number of lines (image density). Further, when printing two continuous tone images using one type of halftone area, if the two continuous tone images are to be made into latent images using functional ink, each continuous tone image Are merged with each other to form a secondary pattern, which causes a noise effect that hinders the latent image effect. For example, using one kind of halftone area, two continuous tone images shown in FIG. 14A and FIG. 14B are printed by halftone dots of circular dots, and a continuous tone image obtained by combining the two is printed. FIG. 14 (c) and FIG.
14 (d) is obtained by printing the image shown in FIG. 14 (d) in a predetermined area in which the gradation is inverted, but in FIG. 14 (e), the halftone dots are fused to form a secondary pattern. It can be seen that the latent image effect is significantly inhibited.

Therefore, in the present invention, for example, when printing a halftone dot obtained by performing image processing on any of the images shown in FIG. 1, a halftone area for printing the halftone dot is m × m. There are provided two types of halftone areas: a halftone area of pixels (m ≧ 2, m is an integer) and a halftone area of n × n pixels (1 ≦ n <m, n is an integer). The halftone regions are arranged without overlapping each other, and the four m × m pixel halftone regions in the mutually independent regions are one n × n
Surround the halftone area of the pixel without gaps,
The two types of halftone regions are arranged such that the four n × n pixel halftone regions in the regions independent of each other are arranged at equal intervals along the outer periphery of one m × m pixel halftone region. After the configuration, halftone dots for expressing one continuous tone image are printed using both types of halftone regions of the two types of halftone regions, and one continuous tone image is printed in a predetermined region. Print or
Alternatively, each type of halftone region of the two types of halftone regions is assigned to one corresponding continuous tone image, and a corresponding continuous tone image is expressed for each type of halftone region. And printing two continuous tone images in a predetermined area. At this time, for example, halftone dots obtained by performing image processing on any of the images shown in FIG. 1 using the technology disclosed in Japanese Patent Application Laid-Open No. H11-268228 are difficult to copy with a copying machine or the like. It is possible to prevent forgery, and if any one of the images shown in FIG. 1 is subjected to image processing using the technique disclosed in Japanese Patent Application Laid-Open No. H11-268228, the halftone dot is mechanically read to determine the authenticity of the printed matter. Becomes possible.

In the present invention, in a predetermined area composed of the two types of halftone areas, one continuous tone image is formed by using both types of halftone areas of the two types of halftone areas. When printing a halftone dot for expression, the one continuous ink is used by using one of two types of inks, which appear to be the same color with the naked eye under normal light but have different optical characteristics from each other. By printing a halftone dot for expressing a tone image and printing an area excluding the halftone dot for expressing the one continuous tone image using the other ink of the two types of inks, The one continuous tone image can be provided as a latent image to the area of the predetermined area, and the predetermined area is made to be color-matched by the naked eye under normal light without forming a secondary pattern by fusion of halftone dots. To be solid It can be printed.

Further, in the present invention, in a predetermined area composed of the two types of halftone areas, one continuous tone image is expressed for each type of halftone area of the two types of halftone areas. When two continuous tone images are printed in the predetermined area by printing halftone dots, the two colors appear to be the same color with the naked eye under normal light, but have different optical characteristics from each other. A halftone dot for expressing any one of the two continuous tone images is printed using one of the two types of ink, and the other of the two types of ink is used. A halftone dot for expressing the other continuous tone image of the two continuous tone images, and has optical characteristics different from any of the two types of inks, but is visually observed under normal light. The two types of a By printing an area excluding halftone dots for expressing the two continuous tone images using ink that looks the same color as the key, the two continuous tone images can be provided as a latent image in the predetermined area. At the same time, the predetermined area can be solid-printed so as to be color-matched to the naked eye under normal light without forming a secondary pattern due to fusion of halftone dots. At this time, the four m × m pixel halftone regions in the mutually independent regions surround the periphery of the one n × n pixel halftone region without gaps, and the four m × m pixel halftone regions in the mutually independent regions. The two types of halftone regions are configured such that halftone regions of n × n pixels are arranged at equal intervals along the outer periphery of one halftone region of m × m pixels. The two continuous tone images can be arranged and printed equally in the area without overlapping each other.

The method of printing a halftone dot printed matter according to the present invention, that is, after providing two types of halftone areas that do not overlap each other as halftone areas for printing halftone dots without gaps, A method of printing a halftone dot printed matter for printing a single continuous tone image in a predetermined area by printing halftone dots for expressing one continuous tone image using both types of halftone areas. 15 is described in correspondence with the reference numerals in FIG. 15. (1) A first threshold data generating unit is provided in two types of halftone regions, and (2) a pixel density is smaller in the two types of halftone regions than in the first threshold data. A second threshold data generator is provided, and (3) image data obtained corresponding to one continuous tone image can be decoded by an output device or software RIP. Ha strike script halftone dot generation method
A command conversion unit for converting to a command conforming to lftoneType16 is provided. (4) A unit for storing dot data obtained corresponding to one continuous tone image is provided. (5) A dot generator or software RIP Is provided with a raster processing unit for giving instructions to (6) TIFF black and white binary halftone images.

Further, the method of printing a halftone dot printed matter according to the present invention, that is, providing two types of halftone areas which do not overlap each other as halftone areas for printing halftone dots without any gap, Halftone dots for expressing each type of halftone area by assigning each type of halftone area to one corresponding continuous tone image, and representing each type of halftone area. The method of printing a halftone print in which two continuous tone images are printed in a predetermined area by printing is described with reference to the reference numerals in FIG. 16. (1) Two types of halftone areas are formed by circular dots. (2) Two types of halftone areas are formed by circular dots having a smaller pixel density than the first threshold data. (3) The image data obtained by the first threshold data creating unit is arranged by arranging the circular dots, and the second threshold data creating unit is arranged by arranging the circular dots having a small pixel density. HalftoneTy of PostScript halftone generation method for each image data of the image data obtained by
a command conversion unit for converting to a command conforming to pe16; (4) a unit for storing dot data corresponding to both the first threshold data creation unit and the second threshold data creation unit; and (5) a halftone dot A raster processing unit for giving an instruction for generation is provided, and (6) a black and white binary halftone image 1 of TIFF is generated. Next, there is provided (1 ') a first threshold data generating section composed of inverted circular dots obtained by inverting black and white in two types of halftone areas, and (2') first threshold data in two types of halftone areas based on the first threshold data. Providing a second threshold data generating unit composed of circular dots having a small pixel density;
(3 ′) By arranging the inverted circular dots, the image data obtained by the first threshold data generating unit and by arranging the circular dots, the image data obtained by the second threshold data generating unit are respectively converted. A command conversion unit for converting to a command conforming to HalftoneType16 of the postscript halftone generation method is provided, and (4 ') a unit for storing dot data corresponding to both the first threshold data generation unit and the second threshold data generation unit And
(5 ') A raster processing unit for giving an instruction to the halftone dot generator is provided, and (6') a black and white binary halftone image 2 of TIFF is generated. And (7) an image operation processing unit for the generated TIFF monochrome halftone images 1 and 2 is provided,
(8) A generation unit for the mask 1 in which m × m pixels are painted black is provided. (9) An inversion unit of the mask 1 is provided. (10)
A generation unit for the mask 2 in which n × n pixels are painted black is provided. The halftone region is divided into a halftone region of m × m pixels and a halftone region of n × n pixels by the masks 1 and 2 thus obtained, and one continuous tone image is provided for each type of halftone region. Can be assigned.

Here, a method of generating a mask required to assign one continuous tone image to each type of halftone area of the two types of halftone areas will be described with reference to the reference numerals in FIG. Will be explained. In the following, a description will be given of a mask generation method in a case where a 58% gray level is assigned to FIG. 17A and a 50% gray level is assigned to FIG. 17B. Fig. 17
In the halftone area of m × m pixels in (b ″), inverted circular dots obtained by inverting the black and white of the circular dots in the halftone area of m × m pixels in FIG. FIG. 17A shows the mxm shown in FIG.
A circular dot in a halftone area of a pixel is shown, and its bitmap data is used as first threshold data. On the other hand, FIG. 17B shows a circular dot in an n × n pixel halftone area having a smaller number of vertical and horizontal pixels than FIG. 17A, and the bitmap data is the second threshold data. The first threshold data and the second threshold data are shown in FIG.
HalftoneType16 of postscript halftone generation method in (3)
The command is converted into a command conforming to the above and stored as dot data in FIG. To the halftone data, an instruction to which HalftoneType16 of the postscript halftone generation method is added is given to a halftone generation device or software RIP to perform raster processing, and the halftone of the black and white binary of TIFF shown in FIG. A tone image 1 is obtained, and the same processing is performed from (1 ′) to (6 ′) in FIG.
A halftone image 2 of the value is obtained.

Next, in FIG. 16 (7), a black and white binary halftone image 1 of TIFF (FIG. 17 (a)) and a black and white binary halftone image 2 of TIFF (FIG. 17 (b)) are shown. FIG. 17C is generated by performing the image calculation process. At this time,
A halftone area of m × m pixels, which is entirely painted black, and n × n, in which circular dots are painted black on a white background
Since the relationship of m> n is always established for the pixel halftone region, the four corners of the m × m pixel halftone region, which are entirely painted black, are slightly continuous with slight bit shift. Commercially available image processing software
Since it has a function that can select a part of the image by using the approximate color of the adjacent pixel, it is possible to select halftone areas of all m × m pixels that are continuous with each other and that are painted black. The mask 1 shown in FIG. 17D can be generated. Also, by inverting the black and white of the mask 1 shown in FIG. 17D, it is possible to generate the mask 2 in which all the halftone areas of n × n pixels are painted black.

[0066]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments of the present invention are not limited to the following embodiments, but are described in the appended claims. Within the range, the embodiment of the invention can be appropriately modified.

(Embodiment 1) As Embodiment 1, FIG.
In printing a halftone dot on each type of halftone area of the two types of halftone areas, as shown in FIG. 18D, in the halftone area of m × m pixels, the halftone area of the Japanese document “50,000” is used. "Five" as input image
Halftone dots (FIG. 18)
(A)), and in the halftone area of n × n pixels, the halftone dot (FIG. 11) is obtained by the technique disclosed in Japanese Patent Application Laid-Open No.
18 (b)), the continuous tone (FIG. 18 (c)) was expressed by modulating the image thickness for each type of halftone area. The quality of the printed matter was as high as that of ordinary printed matter, with a resolution of 80 to 175 lines / inch, and continuous tone could be expressed even in a narrow area. In addition, these halftone dots (FIGS. 18A and 18B)
Has excellent readability in the entire region from the bright part to the dark part of the continuous tone, and the halftone dot can be machine-readable. Further, if these halftone dots (FIGS. 18A and 18B) are copied by a copying machine, the readability of the halftone dots will be significantly impaired, and a forgery prevention function can be provided to the printed matter. Was. At this time, Japanese Patent Application Laid-Open No. H11-268228 discloses several techniques for generating a halftone dot for expressing a continuous tone by performing image processing on a predetermined input image. The input image “five” in the tone area is input using a halftone area of halftone area of nxn pixels and a halftone dot obtained by performing image processing using any of the techniques disclosed in JP-A-11-268228. The image "10,000" is described in JP-A-11-26.
The halftone dots obtained by performing image processing using any of the techniques disclosed in No. 8228 are machine-readable halftone dots in an area from a light portion to a dark portion of continuous tone, Since halftone dots cannot be duplicated by the photoengraving apparatus, a method of image processing the input image of “5” in the halftone region of m × m pixels to generate halftone dots, and “10,000” in the halftone region of n × n pixels The method of generating halftone dots by performing image processing on the input image of the above is different even if they are the same methods as each of the halftone dot generation methods disclosed in JP-A-11-268228. Method,
The machine reading of the halftone dot after expressing the continuous tone was enabled, and the forgery of the printed matter was prevented. Also,
In the first embodiment, a halftone dot is formed in the halftone area of m × m pixels using “5” as an input image, and a halftone dot is formed in the halftone area of n × n pixels using “10,000” as the input image. However, the input image to each type of halftone area is not limited to “five” and “10,000”, respectively. For each type of halftone area,
The input image to each type of halftone area is composed of a meaningful image including any of trademark, family crest, logo mark, and character, and / or an image including any of circle, ellipse, and polygon. As a predetermined input image to be displayed, it is possible to mechanically read the halftone dots after expressing the continuous tone and to prevent forgery of the printed matter.

(Embodiment 2) As Embodiment 2, FIG.
19 (a) and 19 (b), two types of halftone areas, that is, a halftone area of mxm pixels and a halftone area of nxn pixels, are used.
An example will be described in which the two continuous tone images shown in (b) are made into latent images without generating a secondary pattern due to fusion of halftone dots.

FIG. 19 (a ') shows the result of FIG. 19 (a) obtained by a method based on HalftoneType16 of the postscript halftone generation method.
19 (b) is a halftone process of the continuous tone image shown in FIG.
A halftone process is performed on the continuous tone image shown in FIG. 19B by a method according to lftoneType16. FIG.
A mask having the same pixel density as that of (a ′) is created by the method according to FIG. 16, and a mask having the same pixel density as that of FIG. 19 (b ′) is created by the method according to FIG. FIG. 19 (m1) is a partial enlarged view of a mask having the same pixel density as that of FIG. 19 (a '), and FIG. 19 (m2) is a partial enlarged view of a mask having the same pixel density as that of FIG. 19 (b'). Show. In FIG. 20, when the image calculation processing shown in FIG. 20 (a ″) showing a halftone-converted halftone image by a method according to HalftoneType16 of the postscript halftone generation method and the image calculation processing shown in FIG. FIG. 20 (d), which is a dot image, is generated, and FIG. 20 (b ″) showing a halftone-converted halftone image by a method according to HalftoneType16 of the PostScript halftone generation method, and FIG. 20 showing a mask.
When the image calculation processing of (m2) is performed, a halftone image is obtained as shown in FIG.
(D ') is generated. FIG. 20 (d), which is a halftone image, and FIG. 20 (d '), which is a halftone image, are arranged equally in a predetermined area without overlapping each other, and are not merged with each other. Printed. At this time, FIG.
The halftone image of (a ′) shows the same halftone image as the halftone image of FIG. 19 (a ′), and the halftone image of FIG.
The same halftone image as the halftone image of (b ′) is shown.

In this way, it is possible to print the two types of halftone images shown in FIGS. 20 (d) and 20 (d ') which are non-overlapping halftone images. d ') The area excluding the two types of halftone images is visually shown under normal light.
20 (d) and FIG. 20 (d ') must be filled with ink that looks the same color as the two halftone images. As shown in FIG. 21, by performing the image calculation processing of FIG. 21 (d) and FIG. 21 (d ′) which are the halftone images, FIG. 21 (e) is generated, and the gradation of FIG. FIG. 21 (g) is generated by inverting. At this time, the halftone image in FIG. 21D shows the same halftone image as the halftone image in FIG. 20D, and the halftone image in FIG.
The same halftone image as the halftone image of 20 (d ') is shown. Figure
22 (a), (b) and (c) show printing plates prepared by the above method. Here, the printing plate of FIG. 22A is a printing plate for printing the halftone image of FIG. 20D, and the printing plate of FIG. 22B is the halftone image of FIG. The printing plate of FIG. 22 (c) is a printing plate for printing
This is a printing plate for printing an area excluding the halftone dot image and the halftone image of FIG. 20 (d '). When offset printing is performed using each of these three printing plates so that they can be seen by the naked eye in the same color under normal light, as shown in FIG. As a whole, a solid print of the same color without any subsequent pattern was obtained.
At this time, the four m × m pixel halftone regions in the mutually independent regions surround the periphery of the one n × n pixel halftone region without any gaps, and the four m × m pixel halftone regions in the mutually independent regions. Since the two types of halftone regions are configured such that halftone regions of n × n pixels are arranged at equal intervals along the outer periphery of one halftone region of m × m pixels,
FIGS. 20D and 20 which are halftone images that do not overlap each other
The two types of halftone images (d ') were equally arranged in a predetermined area and printed.

(Embodiment 3) As Embodiment 3, in a predetermined area composed of two types of halftone areas, that is, a halftone area of m × m pixels and a halftone area of n × n pixels, a normal light level To express one continuous tone image of two continuous tone images by using either one of two kinds of inks that look the same color with the naked eye but have optical characteristics different from each other. Print a halftone dot and use the other of the two inks to
A halftone dot for expressing the other continuous tone image of one continuous tone image is printed, and the two types of inks have optical characteristics different from those of the two types of inks. 2 using an ink that looks the same color as
Printing an area excluding a halftone dot for expressing two continuous tone images, enabling one of the two continuous tone images to be visually recognized under predetermined viewing conditions, The other continuous tone image of the two continuous tone images can be visually recognized under a predetermined viewing condition different from the viewing condition, and the predetermined region as a whole can be visually recognized under normal light. An example in which printing is performed so as to look like a color will be described.
In FIG. 23, a halftone area of m × m pixels and n × n
A general circular dot is adopted for two types of halftone areas of pixel halftone areas, and the two continuous tone images shown in FIGS. 19A and 19B are merged with halftone dots. This is an example in which a latent image is formed using a functional ink or the like without generating a secondary pattern due to the above. The mixing ratio of the ink used in Example 3 is shown below, but the ink that can be used in the present invention is not limited to the ink having the following mixing ratio.

First, as a visible-excitation visible light-emitting ink which is excited at 546 nm and emits light at 620 nm, about 3% of orange pigment of orange orange and about 7% of azo yellow FG of yellow pigment are used.
% And an offset varnish of about 90%. Fig. 24
Fig. 3 is a diagram showing a fluorescence spectrum of a visible excitation visible light emitter ink. Next, as an ultraviolet-excited visible luminous ink which is excited at 360 nm and emits light at 570 nm, about 2% of pigment orange of orange pigment and pigment yellow G of yellow pigment are used.
It was prepared using about 6%, about 15% of UV-excited offset ink and about 77% of offset varnish. FIG. 25 is a diagram showing a fluorescence spectrum of the ultraviolet-excited visible light emitter ink. Further, as an ordinary ink having no luminescent properties, it was prepared using about 3% of an orange pigment Pigment Orange, about 7% of a yellow pigment Pigment Yellow G, and about 90% of an offset varnish. FIG. 26 is a diagram showing a fluorescence spectrum of a normal ink having no light emission characteristics. The three inks had a color-matching relationship under a white fluorescent lamp. Where the figure
The printing plate of FIG. 22 (b) is used to print the visible excitation visible luminous ink, the printing plate of FIG. 22 (a) is used to print the ultraviolet excitation visible luminescent ink, and the printing plate of FIG. The ink was used to print a normal ink having no light-emitting properties, and the three kinds of inks were offset-printed on a paper provided with a clearance so as not to overlap each other. The pattern printed with the three types of inks is shown in the center (oval part) in FIG. Figure 23
In the central part of (a), no image can be recognized in the reflected light state in the visible light region, but in the transmitted light state in the visible light region, a watermark image (FIG. 23 (b)), and under ultraviolet light, the ultraviolet-excited visible luminous ink is used. As a result, the reflected light image of FIG.
Fig. 23
The reflected light image of (d) could be recognized. At this time,
If the visible-excited visible luminous ink is an infrared-excited visible luminescent ink, no image can be recognized in the reflected light state in the visible light region at the center of FIG. 23A, but in the transmitted light state in the visible light region. FIG. 23 (b) which is a watermark image, the reflected light image of FIG. 23 (c) under ultraviolet light, and FIG. 23 under infrared light
The reflected light image of (d) could be recognized. If this method is used on the front and back of a printed matter, a total of five types of continuous tone images can be printed as latent images.

The functional ink includes a visible region,
Emit light with a wavelength in either the ultraviolet or infrared region
A fluorescent material having a light-emitting property can be used.
However, fluorescent light-emitting materials that emit light having a wavelength in the visible region include:
Zinc sulfide compound, zinc oxide compound, zinc silicate compound
Compounds, yttrium compounds, etc.
Fluorescent light-emitting materials that emit light of, for example, BaSi_TwoO_Five: P
b, SrB_FourO₇F: Eu, Ca_Three(PO _Four): There is Ti etc., wavelength in the infrared region
Fluorescent light-emitting materials that emit light of, for example, LiAlO_Two: F
e 、 (Zn ・ Cd) S: Cu 、 YVO_Four: Nd. In addition, functional
Examples of the ink include an ultraviolet absorbing material, for example,
Inorganic substances such as titanium, zinc sulfide and zinc silicate, oxadi
Organic substances such as thiazole and diaminodiphenyl,
Indium-based compounds that are infrared absorbing materials
Non-based compounds and the like may be used,
Mochromic materials may be used. In the present invention,
Even if a misalignment type of functional ink is used, the latent image
Depending on the optical properties of the functional ink used for printing
The latent image can be viewed under specified viewing conditions.
Was. Also, when printing two latent images in a predetermined area,
Usually looks the same color with the naked eye under light but different from each other
One of two types of functional inks with optical properties
One of two latent images using one type of functional ink
Print one latent image and the other of the two functional inks
The other latent image of two latent images is printed using a kind of functional ink
If printed, one of two types of functional ink
Two under the specified viewing conditions corresponding to the functional ink of
One of the latent images of
Compatible with other types of functional inks
The other of the two latent images under the predetermined viewing conditions
I could see it.

(Embodiment 4) As Embodiment 4, FIG.
In this example, two types of halftone areas, a halftone area of mxm pixels and a halftone area of nxn pixels, adopt general circular dots and function on the right part of the face photo of the ID card. An example will be described in which two face images are provided as latent images using a non-conductive ink so that halftone dots do not fuse with each other. In the right part of the face photograph of the identification card in FIG. 27 (a), no image can be recognized in the reflected light state in the visible light region, but under ultraviolet light, the reflected face image is turned upside down as shown in FIG. 27 (b). Under a light image and infrared light, a reflected light image equivalent to a face photograph could be recognized as shown in FIG. 27 (c).

[0075]

According to the present invention, a continuous tone image is printed using halftone dots, which are difficult to copy with a general plate-making machine, and which can be read by a machine. Forgery and alteration can be prevented. According to the present invention, one continuous tone image can be printed in a predetermined area, and two continuous tone images can be printed in a predetermined area without overlapping each other, and two continuous tone images can be printed in a predetermined area. Continuous tone images can be arranged and printed equally without the fusion of halftone dots. At this time, a continuous tone image is printed in a predetermined area using a functional ink so as to form a latent image, and continuous printing is performed using normal ink which looks similar to the functional ink with the naked eye under normal light. By printing the area excluding the toned image, solid printing can be performed so that the predetermined area on which the latent image is printed has the same color as a whole.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining that a shape having a meaning of itself such as a trademark, a family crest, a logo mark, and a character can be freely adopted as a shape of a halftone dot used in the present invention.

FIG. 2 is a diagram for explaining an example of a halftone dot generation pattern of a general commercial print.

FIG. 3 is a view for explaining vertical and horizontal address values of a grid managed by a mathematical function in a halftone screen of a PostScript language.

FIG. 4 is a diagram illustrating an example of a mathematical function and illustrating a state in which priorities to be filled are assigned;

FIG. 5 is a continuous tone image used for explaining a halftone dot printed matter and a printing method of the present invention.

FIG. 6 is a diagram illustrating a method that does not use a mathematical function in the halftone creation method of the PostScript language, and illustrates a state in which the priority of filling is assigned by the number of gradations.

FIG. 7 is a diagram for explaining that a design that does not use a mathematical function is applied in the halftone creation method of the PostScript language to impart designability to a generated pattern.

FIG. 8 is a diagram for explaining a blurring process in the halftone generation method of the present invention.

FIG. 9 is a diagram for explaining a state of a sharp blur processing at a position where an object forms an intersection.

FIG. 10 is a diagram (Z1) illustrating a state of a sharp blur processing for a region where an object forms an intersection with an example of a Japanese document “I”, and as a gradation expression other than a character region, FIG. 2 is a diagram illustrating dispersing density (Z2), and FIG. 2B is a diagram illustrating a method of allocating an area without density of several pixels to a character outline portion and enabling character recognition even in a gradation area of a dark part. (Z3).

FIG. 11 is a printed material expressing gradation using the technique disclosed in Japanese Patent Application Laid-Open No. 11-268228.

FIG. 12 is a printed matter obtained by converting Japanese document type “printing bureau” into a halftone dot.
The figure explaining the situation that it becomes difficult to raise.

FIG. 13 is a diagram illustrating a printed material in which a Japanese document “copy prohibited” is halftone-dotted, in which the halftone dot diameter itself becomes large and it is difficult to increase the number of lines (image density).

FIG. 14: When a plurality of continuous tone images are converted to a latent image using functional ink or the like, halftone dots are fused to form a secondary pattern, which inhibits the latent image effect and reduces the noise effect. FIG.

FIG. 15 is a diagram illustrating a halftone dot generation method according to the present invention in a case where one continuous tone image is expressed using both types of halftone regions of the two types of halftone regions.

FIG. 16 illustrates a halftone dot generation method and a mask generation method according to the present invention in a case where one continuous tone image is assigned to each of the two types of halftone regions to represent two continuous tone images. FIG.

FIG. 17 is a view for explaining a method of creating a mask necessary to allocate two types of halftone areas.

In the first embodiment, the halftone area of the Japanese document “50,000” is halftoned in the halftone area of m × m pixels, and the halftone area of the Japanese document is “5” in the halftone area of n × n pixels. FIG. 9 is a diagram illustrating that “10,000” of “10,000” is halftone-dotted to represent continuous tone.

FIG. 19 is a diagram for explaining the correspondence between two types of halftone images and masks formed by a method according to HalftoneType16 of the postscript halftone generation method in the second embodiment.

In Example 2, when image processing is performed on two types of halftone images and a mask formed by a method according to HalftoneType16 of a postscript halftone generation method, the two types of halftone images overlap each other. The figure explaining that it is generated without.

FIG. 21 is a diagram illustrating a method of creating a region excluding two types of halftone images that do not overlap each other in the second embodiment.

In Example 2, when offset printing is performed on each of the three types of color-matched inks using the corresponding printing plates obtained according to the present invention, solid printing that does not overlap with each other is performed. The figure explaining that it is possible.

23. In Example 3, after adopting general circular dots for two types of halftone areas, two continuous tone images were formed using functional ink without fusing halftone dots. FIG. 6 is a diagram illustrating an example of a latent image.

FIG. 24 is a view for explaining the fluorescence spectrum of the visible excitation visible light emitter ink used in Example 3.

FIG. 25 is a view for explaining a fluorescence spectrum of the ultraviolet-excited visible light emitter ink used in Example 3.

FIG. 26 is a diagram illustrating a fluorescence spectrum of a normal ink having no light emission characteristics used in Example 3.

FIG. 27 is a diagram illustrating an example in which the present invention is applied to an identification card in the fourth embodiment.

[Explanation of symbols]

Z1 An intersection area of a character portion that prevents uneven density distribution (broken image lines) by blurring to an acute angle Z2 By dispersing the density outside the character area,
An area where the gradation from the middle to the bright part is smoothly reproduced Z3 A contour part of a character to which a zero density (FF) area of several pixels is assigned p A contour of a predetermined input image is extracted, the inside of the contour is blurred, and an image The components (dots) output by performing internal sharpening on the intersection area of, performing external density dispersion processing on the outside of the contour, and allocating a zero pixel density (FF) area to the contour area
Printed matter consisting of: p ′ The inside of a predetermined input image is subjected to internal blurring processing, the area of intersection of image lines is subjected to internal sharpening processing, and the outside of the input image is subjected to external density dispersion processing and output from constituent elements (dots). The printed matter p "is composed of components (dots) which are obtained by subjecting the interior of a predetermined input image to internal blur processing, performing internal sharp blur processing at an intersection area of image lines, and performing external density dispersion processing on the outside of the input image. Printed matter 1 First threshold data creation unit for two types of halftone areas 2 Second threshold data creation unit having a smaller pixel density than the first threshold data 3 Output image data and software RIP
HalftoneTy, a Postscript Halftone Generating Method That Can Be Decrypted
A part that converts to the command conforming to pe16 4 A part that saves the obtained halftone data 5 A raster processing part that gives instructions to a halftone generator and software RIP 6 A part that generates a monochrome binary binary TIFF image 1 'First threshold data generating unit composed of inverted circular dots in two types of halftone areas 2' Second threshold data generating unit composed of circular dots having a smaller pixel density than the first threshold data 3 'Image obtained Data output device and software RIP
HalftoneTy, a Postscript Halftone Generating Method That Can Be Decrypted
A part for converting to the command conforming to pe16 4 'A part for storing the obtained halftone data 5' A raster processing part for giving instructions to the halftone generator and software RIP 6 'A black and white binary halftone image of TIFF 7 A processing unit for the generated TIFF monochrome halftone dot image 8 A mask generation unit that fills a halftone area of mxm pixels black 9 A mask inversion unit 10 A halftone of nxn pixels Generation unit for masks with blacked out areas

Claims (45)

[Claims] 1. When printing a halftone dot for expressing a continuous tone image, a halftone area for printing the halftone dot is mx
Two types of halftone regions are provided: a halftone region of m pixels (m ≧ 2, m is an integer) and a halftone region of n × n pixels (1 ≦ n <m, n is an integer). The tone regions are arranged without overlapping each other, and the four m × m pixel halftone regions in the mutually independent regions surround the single n × n pixel halftone region without gaps, and are independent of each other. The two types of halftone regions are configured such that the four n × n pixel halftone regions in the divided region are arranged at equal intervals along the outer periphery of one m × m pixel halftone region. In the above, the halftone dot is printed using both types of halftone regions of the two types of halftone regions. 2. A method for expressing one continuous tone image by using both types of halftone areas in a predetermined area composed of the two types of halftone areas. The halftone printed matter according to claim 1, wherein halftone dots are printed, and one continuous tone image is printed in the predetermined area. 3. A network for expressing one continuous tone image for each of the two types of halftone areas in a predetermined area composed of the two types of halftone areas. The halftone printed matter according to claim 1, wherein dots are printed, and two continuous tone images are printed in the predetermined area. 4. In the predetermined area, the continuous tone image is formed by using any one of two kinds of inks which appear to be the same color with the naked eye under normal light but have different optical characteristics from each other. And printing an area excluding the halftone dots for expressing the continuous tone image using the other ink of the two types of inks under a predetermined viewing condition. The halftone printed matter according to claim 2, wherein the continuous tone image is made visible, and the predetermined area is printed so as to be seen as a whole by the naked eye under normal light. . 5. The two consecutive floors in the predetermined area, using one of two kinds of inks which look similar to the naked eye under normal light but have different optical characteristics from each other. Printing a halftone dot for expressing one of the continuous tone images of the toned image, and expressing the other continuous tone image of the two continuous tone images using the other of the two types of inks Prints a halftone dot to make the two types of inks have optical characteristics different from those of the two types of inks, but the two types of inks can be seen by the naked eye under normal light to have the same color as the two types of inks. Printing an area excluding a halftone dot for expressing the continuous tone image, enabling one of the two continuous tone images to be visually recognized under predetermined viewing conditions, Under specified viewing conditions different from viewing conditions The other continuous tone image of the two continuous tone images is made visible, and the predetermined region is printed so as to be seen as a whole by the naked eye under normal light. 4. The halftone printed matter according to claim 3, 6. A halftone dot printed on one of the two types of halftone areas to represent the continuous tone image, wherein the halftone area is one of the two types of halftone areas. The halftone dot printed matter according to any one of claims 1 to 5, wherein the halftone dot is a halftone dot obtained by internally blurring an inside of a contour of a predetermined input image corresponding to (i). 7. A halftone dot printed in one of the two types of halftone areas to represent the continuous tone image, wherein the halftone area is one of the two types of halftone areas. The halftone printed matter according to any one of claims 1 to 5, wherein the halftone dot is obtained by externally blurring or externally dispersing the contour outside of the predetermined input image corresponding to the halftone image. 8. A halftone dot printed on one of the two types of halftone areas to represent the continuous tone image, wherein the halftone area is one of the two types of halftone areas. 2. A halftone dot obtained by internally blurring the inside of a contour of a predetermined input image corresponding to the image, and internally sharpening the intersection of the image lines of the predetermined input image. 6. A halftone printed matter according to any one of claims 1 to 5. 9. A halftone dot printed on one of the two types of halftone areas to represent the continuous tone image, wherein the halftone area is one of the halftone areas. Wherein the inside of the outline of the predetermined input image corresponding to the image is internally blurred, and the outside of the outline of the predetermined input image is a halftone dot obtained by external blurring processing or external density dispersion processing. 6. A halftone dot printed matter according to any one of 1 to 5. 10. A halftone dot printed on one of the two types of halftone areas to represent the continuous tone image, wherein the halftone area is one of the two types of halftone areas. The inside of the outline of the predetermined input image corresponding to the inside is internally blurred, the point of intersection of the object line of the predetermined input image is internally sharpened, and the outside of the outline of the predetermined input image is externally blurred or subjected to external density. The halftone printed matter according to any one of claims 1 to 5, wherein the halftone dot is a halftone dot obtained by a dispersion process. 11. A halftone dot printed on one of the two types of halftone areas to represent the continuous tone image, wherein the halftone area is one of the two types of halftone areas. Is a halftone dot obtained by performing external blurring processing or external density dispersion processing on the outside of the contour of the predetermined input image corresponding to the above, and allocating a zero density area of several pixels to the contour area of the predetermined input image. The halftone dot printed matter according to any one of claims 1 to 5. 12. A halftone dot printed on one of the two types of halftone areas to represent the continuous tone image, wherein the halftone area is one of the two types of halftone areas. The inside of the outline of the predetermined input image corresponding to the inside is internally blurred, and the outside of the predetermined input image is externally blurred or subjected to external density dispersion processing. The halftone printed matter according to any one of claims 1 to 5, wherein the halftone dot is obtained by assigning the following. 13. A halftone area printed on one of the two types of halftone areas to represent the continuous tone image, wherein the halftone area is one of the halftone areas. The inside of the contour of the predetermined input image corresponding to the inside is internally blurred, the point of intersection of the image line of the predetermined input image is internally sharpened, and the outside of the predetermined input image is externally blurred or the external density dispersion. The halftone dot printed matter according to any one of claims 1 to 5, wherein the halftone dot is obtained by processing and assigning a zero density area of several pixels to an outline area of the predetermined input image. 14. A halftone area used for expressing the continuous tone image, and a halftone dot printed in the other type of halftone area excluding the one type of halftone area is The halftone dot according to any one of claims 6 to 13, wherein the halftone dot is obtained by internally blurring the inside of the outline of a predetermined input image corresponding to the other type of halftone region. Dot prints. 15. A halftone area used for expressing the continuous tone image, and a halftone dot printed in the other type of halftone area excluding the one type of halftone area is 7. A halftone dot obtained by performing external blur processing or external density dispersion processing on the outside of the outline of a predetermined input image corresponding to the other type of halftone area.
14. A dot printed matter according to any one of claims 13 to 13. 16. A halftone area used for expressing the continuous tone image, and a halftone dot printed in the other type of halftone area excluding the one type of halftone area is a halftone area. The inside of the outline of the predetermined input image corresponding to the other type of halftone region is internally blurred, and the halftone dot obtained by performing the internal sharp blur processing at the intersection of the image line of the predetermined input image. The halftone dot printed matter according to any one of claims 6 to 13, wherein: 17. A halftone area used for expressing the continuous tone image, and a halftone dot printed in the other type of halftone area excluding the one type of halftone area is A halftone dot obtained by internally blurring the inside of the outline of the predetermined input image corresponding to the other type of halftone region and externally blurring or externally dispersing the outline of the predetermined input image. The halftone printed matter according to any one of claims 6 to 13, wherein 18. A halftone area used for expressing the continuous tone image, and a halftone dot printed in the other type of halftone area excluding the one type of halftone area is The inside of the outline of the predetermined input image corresponding to the other type of halftone area is internally blurred, and the point of intersection of the image of the predetermined input image is internally sharpened, and the sharpness of the predetermined input image is reduced. 14. The halftone dot printed matter according to claim 6, wherein the halftone dot is a halftone dot obtained by subjecting the outline outside to external blurring processing or external density dispersion processing. 19. A halftone area used for expressing the continuous tone image, and a halftone dot printed on the other type of halftone area excluding the one type of halftone area is External blur processing or external density dispersion processing of the outside of a predetermined input image corresponding to the other type of halftone area, and assigning a density zero area of several pixels to the predetermined input image outline area. The halftone printed matter according to any one of claims 6 to 13, wherein the halftone dot is a printed halftone dot. 20. A halftone area used for expressing the continuous tone image, and a halftone dot printed on the other type of halftone area excluding the one type of halftone area is The inside of the outline of a predetermined input image corresponding to the other type of halftone region is internally blurred, and the outside of the predetermined input image is externally blurred or subjected to external density dispersion processing. 14. The halftone printed matter according to claim 6, wherein the halftone dot is obtained by allocating a zero density area of several pixels to the outline area. 21. A halftone area used for expressing the continuous tone image, and a halftone dot printed on the other type of halftone area excluding the one type of halftone area is The inside of the outline of the predetermined input image corresponding to the other type of halftone area is internally blurred, and the point of intersection of the image of the predetermined input image is internally sharpened, and the sharpness of the predetermined input image is reduced. 14. A halftone dot obtained by performing external blurring processing or external density dispersion processing on the outside and assigning a density zero area of several pixels to an outline area of the predetermined input image. Dot printed matter described in 1. 22. The predetermined input image includes a trademark, a family crest,
The image according to any one of claims 6 to 21, wherein the image includes a meaningful image including any of a logo mark and a character and an image including any of a circle, an ellipse, and a polygon. Dot printed matter described in 1. 23. When printing a halftone dot for expressing a continuous tone image, mx is used as a halftone area for printing the halftone dot.
A halftone area of m pixels (m ≧ 2, m is an integer) and a halftone area of n × n pixels (1 ≦ n <m, n is an integer) are provided. Are arranged without overlapping each other, and the four m × m pixel halftone regions in mutually independent regions surround the periphery of one n × n pixel halftone region without gaps, The two types of halftone regions are arranged such that the four n × n pixel halftone regions in independent regions are arranged at equal intervals along the outer periphery of one m × m pixel halftone region. A method of printing a halftone dot printed matter, wherein the halftone dots are printed using both types of halftone areas of the two types of halftone areas. 24. In a predetermined area composed of the two types of halftone areas, one continuous tone image is expressed by using both types of halftone areas of the two types of halftone areas. The method of printing a halftone print according to claim 23, wherein halftone dots are printed, and one continuous tone image is printed in the predetermined area. 25. A network for expressing one continuous tone image for each of the two types of halftone regions in a predetermined region composed of the two types of halftone regions. The method of printing a halftone dot print according to claim 23, wherein dots are printed, and two continuous tone images are printed in the predetermined area. 26. Circular dots corresponding to the m × m pixel halftone area are arranged in all the m × m pixel halftone areas, and are also corresponding to the n × n pixel halftone areas. A black-and-white binary halftone image in which circular dots are arranged in all the n × n pixel halftone regions, and an inverted circular dot obtained by inverting the black and white of the circular dots corresponding to the m × m pixel halftone region A black-and-white binary image in which all the m × m pixels are arranged in the halftone region and the circular dots corresponding to the n × n pixels are arranged in the halftone region of all the n × n pixels. Only the continuous black area is selected from the image obtained by performing the image operation processing on the halftone image, and the halftone area of m × m pixels is selected. By to produce a mask that matches, overlaying the mask to match the half-tone region of the m × m pixels for the predetermined area that the,
The halftone area of the n × n pixels is extracted from the predetermined area, and a mask obtained by inverting the black and white of the mask is overlapped on the predetermined area so as to match the halftone area of the n × n pixels. By doing so, the mx
By extracting a halftone region of m pixels, the predetermined region is divided into two types of halftone regions, a halftone region of the m × m pixels and a halftone region of the n × n pixels, Are assigned to the corresponding continuous tone images, and a halftone dot for expressing one continuous tone image is printed for each type of halftone region. Item 30. The method for printing a dot print according to Item 25. 27. In the predetermined area, the continuous tone image is formed by using any one of two kinds of inks which appear to be the same color with the naked eye under normal light but have different optical characteristics from each other. And printing an area excluding the halftone dots for expressing the continuous tone image using the other of the two types of inks, under the predetermined viewing condition. 3. The printing method according to claim 2, wherein the continuous tone image is visually recognized, and the predetermined area is printed so as to be seen as a uniform color by the naked eye under normal light.
5. The printing method of the halftone dot printed matter according to 4. 28. In the predetermined area, the two continuous floors are formed by using one of two kinds of inks, which appear to be the same color to the naked eye under normal light but have different optical characteristics from each other. Printing a halftone dot for expressing one of the continuous tone images of the toned image, and expressing the other continuous tone image of the two continuous tone images using the other of the two types of inks Prints a halftone dot to make the two types of inks have optical characteristics different from those of the two types of inks, but the two types of inks can be seen by the naked eye under normal light to have the same color as the two types of inks. Printing an area excluding a halftone dot for expressing the continuous tone image, enabling one of the two continuous tone images to be visually recognized under predetermined viewing conditions, Predetermined viewing conditions different from viewing conditions And making the other continuous tone image of the two continuous tone images visually recognizable, and printing so that the predetermined area as a whole looks uniform in color with the naked eye under normal light. Claim 2
27. The printing method of the halftone dot printed matter according to 5 or 26. 29. A halftone dot printed on one of the two types of halftone areas to represent the continuous tone image, wherein the halftone area is one of the two types of halftone areas. 29. The method of printing a halftone dot printed matter according to claim 23, wherein the halftone dot is obtained by internally blurring the inside of the outline of the predetermined input image corresponding to the halftone image. 30. A halftone dot printed on one of the two types of halftone areas to represent the continuous tone image, wherein the halftone area is one of the two types of halftone areas. The halftone dot print according to any one of claims 23 to 28, wherein the halftone dot is obtained by externally blurring or externally dispersing the contour outside of the predetermined input image corresponding to the dot image. Method. 31. A halftone dot printed on one of the two types of halftone areas to represent the continuous tone image, wherein the halftone area is one of the two types of halftone areas. 24. A halftone dot obtained by internally blurring the inside of a contour of a predetermined input image corresponding to the following, and performing internal sharp blur processing at an intersection of image lines of the predetermined input image. 29. The method for printing a halftone dot printed matter according to any one of the above items. 32. A halftone area printed in one of the two types of halftone areas to represent the continuous tone image, wherein the halftone area is one of the two types of halftone areas. Wherein the inside of the contour of the predetermined input image corresponding to the image is internally blurred, and the outside of the contour of the predetermined input image is a halftone dot obtained by external blurring processing or external density dispersion processing. 29. The printing method of a halftone dot printed matter according to any one of 23 to 28. 33. A halftone dot printed in one of the two types of halftone areas to represent the continuous tone image, wherein the halftone area is one of the two types of halftone areas. The inside of the contour of the predetermined input image corresponding to the inside is internally blurred, the point of intersection of the object line of the predetermined input image is sharpened inside, and the outside of the outline of the predetermined input image is externally blurred or externally darkened. The method of printing a halftone dot printed matter according to any one of claims 23 to 28, wherein the halftone dot is a halftone dot obtained by a distributed process. 34. A halftone dot printed on one of the two types of halftone areas to represent the continuous tone image, wherein the halftone area is one of the two types of halftone areas. Is a halftone dot obtained by performing external blurring processing or external density dispersion processing on the outside of the contour of the predetermined input image corresponding to (i), and assigning a zero density area of several pixels to the contour area of the predetermined input image. The method of printing a halftone print according to any one of claims 23 to 28. 35. A halftone dot printed in one of the two types of halftone areas to represent the continuous tone image, wherein the halftone area is one of the two types of halftone areas. The inside of the contour of the predetermined input image corresponding to the inside is internally blurred, and the outside of the predetermined input image is subjected to external blurring processing or external density dispersion processing. 29. The method of printing a halftone dot printed matter according to claim 23, wherein the halftone dot is obtained by assigning the following. 36. A halftone dot printed on one of the two types of halftone areas to represent the continuous tone image, wherein the halftone area is one of the two types of halftone areas. The inside of the contour of the predetermined input image corresponding to the inside is internally blurred, the point of intersection of the object line of the predetermined input image is internally sharpened, and the outside of the predetermined input image is externally blurred or the external density dispersion. The halftone dot printing method according to any one of claims 23 to 28, wherein the halftone dot is obtained by processing and assigning a zero density area of several pixels to an outline area of the predetermined input image. . 37. A halftone area used for expressing the continuous tone image, and a halftone dot printed in the other type of halftone area excluding the one type of halftone area is The halftone dot according to any one of claims 29 to 36, wherein the halftone dot is a halftone dot obtained by internally blurring the inside of a contour of a predetermined input image corresponding to the other type of halftone region. How to print dot prints. 38. A halftone area used for expressing the continuous tone image, and a halftone dot printed in the other type of halftone area excluding the one type of halftone area is 3. A halftone dot obtained by performing external blurring processing or external density dispersion processing on the outside of the outline of a predetermined input image corresponding to the other type of halftone area.
A printing method of a halftone dot printed matter according to any one of Items 9 to 36. 39. A halftone area used for expressing the continuous tone image, and a halftone dot printed in the other type of halftone area excluding the one type of halftone area is The inside of the outline of the predetermined input image corresponding to the other type of halftone area is internally blurred, and the halftone dot obtained by performing the internal sharp blur processing at the intersection of the image lines of the predetermined input image. The method of printing a halftone dot print according to any one of claims 29 to 36, wherein: 40. A halftone area used for expressing the continuous tone image, and a halftone dot printed in the other type of halftone area excluding the one type of halftone area is A halftone dot obtained by internally blurring the inside of the outline of the predetermined input image corresponding to the other type of halftone region and externally blurring or externally dispersing the outline of the predetermined input image. 30. The method of claim 29, wherein
36. A method for printing a halftone dot printed matter according to any one of the above items. 41. A halftone area used for expressing the continuous tone image, and a halftone dot printed in the other type of halftone area excluding the one type of halftone area is The inside of the outline of the predetermined input image corresponding to the other type of halftone area is internally blurred, and the point of intersection of the image of the predetermined input image is internally sharpened, and the predetermined input image is blurred. The method for printing a halftone dot printed matter according to any one of claims 29 to 36, wherein the halftone dot is obtained by performing external blurring processing or external density dispersion processing on the outside of the contour. 42. A halftone area used for expressing the continuous tone image, and a halftone dot printed on the other type of halftone area excluding the one type of halftone area is External blur processing or external density dispersion processing on the outside of a predetermined input image corresponding to the other type of halftone area, and a density zero area of several pixels is assigned to the predetermined input image outline area. The method for printing a halftone dot printed matter according to any one of claims 29 to 36, wherein the halftone dot is a printed halftone dot. 43. A halftone area used for expressing the continuous tone image, and a halftone dot printed on the other type of halftone area excluding the one type of halftone area is The inside of the outline of a predetermined input image corresponding to the other type of halftone region is internally blurred, and the outside of the predetermined input image is externally blurred or subjected to external density dispersion processing. The method of printing a halftone dot print according to any one of claims 29 to 36, wherein the halftone dot is obtained by assigning a zero density area of several pixels to the contour area. 44. A halftone area used for expressing the continuous tone image, and a halftone dot printed on the other type of halftone area excluding the one type of halftone area is The inside of the outline of the predetermined input image corresponding to the other type of halftone area is internally blurred, and the point of intersection of the image of the predetermined input image is internally sharpened, and the predetermined input image is blurred. 37. A halftone dot obtained by performing external blurring processing or external density dispersion processing on the outside and allocating a zero-density area of several pixels to an outline area of the predetermined input image. Printing method of the halftone dot printed matter described in 1. 45. The predetermined input image includes a trademark, a family crest,
45. The image according to any one of claims 29 to 44, comprising a meaningful image including any of a logo mark and a character, and at least one of an image including any of a circle, an ellipse, and a polygon. Printing method of the halftone dot printed matter described in 1.