JPH11268228A - Halftone screen making method and printed matter - Google Patents

Abstract

(57) [Abstract] [Problem] To create a continuous tone image composed of halftone screens (halftone dots) which is not reproduced by a copying machine or the like, and which is applied to banknotes, securities, etc. A forgery-prevention tone reproduction method for determining the authenticity of a given halftone dot using a machine reader or the like. SOLUTION: (1) An image input unit is provided for reading an image having a design property having a meaning of itself, such as a trademark, a family crest, a symbol mark, a character, a Japanese document, and (2) an outline extraction of an input image. An image processing unit is provided to provide a processing unit, and (3) an image processing unit for internally blurring the inside of the contour to increase the number of gradations, and (3 ') an image to be sharply blurred inside a region where the object line forms an intersection inside the contour. An image processing unit for multi-grading by (4) externally blurring the outside of the contour or (4 ') externally dispersing the outside of the contour;
(5) an image processing unit for allocating a zero-density region of several pixels to the contour region; (6) a processing unit for converting the obtained image data into a PostScript command readable by the output device; (7) a network A processing unit for giving an instruction to the point generator is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in a printing field which requires a function of preventing counterfeiting and falsification of banknotes, passports, securities, cards, valuable printed matter and the like.

[0002]

2. Description of the Related Art At present, 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 constituted by a set of curved lines with a fixed line width, or a small character is arranged. The patterns can be designed to prevent counterfeiting and alteration in consideration of the design properties of securities designs and the like, and it is difficult to create the same pattern by complicating the pattern. The use of colors that are difficult to reproduce in a copying machine or the generation of moire with respect to the scanning input / output of a copying machine and a scanner by forming a complicated musical image line have increased the role of forgery prevention. In addition, these patterns are widely used worldwide as security designs, and have been used for a long time as printed materials having a monetary value, such as banknotes, stocks, and bonds. It was an important pattern as a design that impressed the luxury.

However, in recent years, the quality of color copiers has been improved,
With the computerization of color plate making technology, counterfeiting means for banknotes and securities tend to be diversified. In particular, the resolution of image input / output devices used in the printing industry has significantly improved, and thin line drawings used in securities have been easily extracted. This suggests the possibility of a more full-scale forgery using a special color plate rather than simply a forgery using a general commercial printing method having a four-color halftone dot configuration.

In view of the above points, the present invention provides a counterfeiting prevention measure to a continuous tone image, makes it difficult to extract a line drawing with a current photoengraving apparatus, and has a function of recognizing a specific original such as machine reading. It is intended to provide a gradation reproduction method for prevention.

[0005] In connection with the printing industry,
In order to express a halftone, that is, a continuous tone image, in addition to the black-and-white binary on the printing paper, a halftone dot is always required. It depends on the perception of the key. Since the technology for halftoning the continuous tone image has been led by a major stencil manufacturer, it was impossible for the user to freely create halftone dots. However, in the modern plate-making printing industry, color prints integrating characters and images have become relatively popular due to the development of postscript language, one of the computer page description languages, and the spread of commercially available application software based on the development technology. The ease of creation and the widespread use of the PostScript language have allowed users to undertake the development of halftone screens.

In the halftone dot creation method based on the PostScript language, a digital film recorder is used. In this device, character, image or illustration data created by application software is created as page description data in PostScript language, and RIP (Raster Imag
The image is converted into a set of black and white dots (bitmap) by a device called an e-processor) and converted to a black-and-white dot (bitmap) image, which is output to a photosensitive material with a high-density laser beam of 2000 to 5000 pixels per inch Things. 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 values.

According to the halftone dot making method using the digital film recorder, for example, the amplitude modulation method is based on regularly arranging pixels whose size changes in a balanced manner with respect to the tone value of the document. . The characteristics are determined by the manner in which the shape of a pixel changes as the number of lines, the dot angle, the dot shape, or the tone value increases.

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

Further, 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 the addresses of the individual grids are represented by numerical values from −1 to 1. Receiving the values of these coordinates, the mathematical function calculates a value from -1 to 1. This value is the priority for filling the pixels. Each grid in FIG. 3 is, for example, in the case of a mathematical function 1- (X ² + Y ² ), the addresses X and Y of the individual grids are represented by X of the mathematical function. , Y, FIG.
The numerical value of each pixel in (a) is obtained. As shown in FIG. 4 (b), the center 1 is painted first, then 0.75,
0.5,. . . . . . , -1 and the numerical values are filled in ascending order. The same numerical value is arranged in several places other than the central numerical value 1, but the order between the numerical values depends on the computer built in the machine.

[0010]

The prior art described in detail above can produce a more complicated halftone dot shape by using a mathematical function, and is effective as a tone reproduction method for preventing forgery. . However, this technique requires proficiency in mathematical functions and the postscript language on which the technology is based, such as trademarks, family crests, emblems, letters, etc.
There is a limit to creating an arbitrary shape with a design that has its own meaning using only mathematical functions.

Therefore, the present invention provides, for example, converting an input image shown in FIG. 1 in consideration of the design property into a continuous tone image composed of halftone screens (halftone screens) and applying the continuous tone image to bills or securities. Thus, a printed material that is difficult to copy with a copying machine or the like is created, a counterfeiting action is prevented beforehand, and a function of being able to judge the assigned halftone dot by machine reading (machine reading will be described later) is provided. Things.

[0012]

According to the present invention, the tone of a continuous tone image is directly applied to individual grids (grids) by computer image processing without using the above-mentioned mathematical function, thereby generating halftone dots. It provides a degree of freedom for the pattern.

FIG. 5 shows that one pixel of an arbitrary continuous tone image has 26 pixels.
FIG. 9 is a diagram for explaining a halftone creation method used in the present invention, 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. 4 described above without using a mathematical function, the number of gradations of the continuous gradation image shown in FIG. 6, that is, a value of 26 gradations is assigned. In order to express 14 tones out of the 26 tones in FIG. 5 by halftone dots by directly applying 26 tones to each grid, the center 1 is first painted out as shown in FIG. , Then two, three,. . . . . . , 12, and from the lowest numerical value to the 13th value smaller than 14 tones.

As described above, the number of tones of a continuous tone image is directly applied to each grid of 5 × 5 pixels vertically and horizontally,
If the numerical value is smaller than the number of tones on each pixel of the continuous tone image, the painting is executed and halftone dots are created.

FIG. 7 explains that free halftone dots can be created according to this method. As shown in FIG. 6 described above, a change is applied to the generation pattern that is painted outward from the center, and when the pattern has brightness of six gradations, for example, a halftone dot of a face showing both eyes and a mouth appears. .

By applying the above principle, in the present invention, an image width of an arbitrary shape is modulated by blurring an image as shown in FIG. In FIG. 8, the number of gradations is given to each grid of 5 × 5 pixels vertically and horizontally when a part of the section subjected to the blurring processing is enlarged. In this case, the object becomes gradually thicker outward from the center of the line.

Also, as shown by a broken line in FIG. 24, the intersecting area in the halftone dot image is blurred in an acute angle so that the image of the intersection area of the object line which is likely to occur at the time of printing is obtained as shown in FIG. Prevent line collapse and improve readability and dot quality.

Outside the halftone dot image, the gradation reproducibility is improved from the middle of the continuous tone to the dark part by performing the density dispersion processing as shown in FIG. 26Z2 instead of the blur processing from the center of the grid to the peripheral direction. Let it.

Further, as shown in FIG. 26Z3, a contour area of a halftone dot is assigned a zero-density (FF) area of several pixels to give a gap that is not filled between the inside and the outside.
Halftone dots can be recognized in the entire region from the bright part to the dark part of the continuous tone image, and readability is improved.

Here, if the method of forming halftone dots according to the present invention is shown as a flow chart, FIG. 9 corresponding to claims 1, 9 and 17 and FIGS. 1
FIG. 11 corresponding to 1, 19, and FIG. 1 corresponding to claims 4, 12, and 20
2, FIG. 13, claim 6, 14, 2 corresponding to claims 5, 13, 21
14 corresponding to FIG. 2, FIG. 15 corresponding to claims 7, 15, and 23,
This is shown in FIG. 16 corresponding to claims 8, 16, and 24.

In these flowcharts,
If an image processing unit that reverses the input image is provided as necessary, a series of processing can be started from the input image corresponding to the highlight part, or a series of processing can be performed from the input image corresponding to the shadow part. You can also start. Further, an image processing unit for inverting the gradation of the image data obtained through all the processes can be provided.

The halftone screen created by the halftone screen creation method of the present invention is machine-readable in any region from the highlight to the shadow, regardless of the halftone screen created by any of the creation methods. (The machine reading will be described later.)

As described above, according to the present invention, a designer can design a halftone dot using a generally used personal computer and image processing software without using a special system according to a customer order. It is characterized in that it is possible.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for producing a halftone screen (continuous tone halftone dots) according to the present invention will be described later with reference to FIG.
(1) Trademarks, family crests, logo marks, symbol marks, characters, company names, slogans, warning texts, etc.
An image input unit for reading an image having a design characteristic that has a meaning in itself; (2) an outline extraction processing unit for the input image; and (3) an image in which the inside of the outline is blurred and subjected to multi-gradation. A processing unit, (3 ′) an internal sharpening processing unit for the intersection area of the image, and (4 ′) an image processing unit for multi-gradation by performing external density dispersion processing on the outside of the contour;
(5) Allocating a zero-density area of several pixels to the contour area, and (6) providing a part for converting the obtained image data into a PostScript command that can be decoded by the output device.
(7) A processing unit for giving an instruction to the halftone generator is provided.

Hereinafter, the present invention will be described more specifically with reference to the drawings by way of examples, but the present invention is not limited thereto. First Embodiment As a first embodiment, an example will be described in which, as shown in FIG. 1 as a designable logo mark, a Japanese document “I” is converted to a halftone dot, and the image thickness is modulated to reproduce a continuous tone image.
The print quality of the present invention is equivalent to that of general prints.
It has a resolution of ~ 175 lines / inch and can be reproduced in a small area. FIG. 1 shows an arbitrary logo mark or the like employed in the present invention, but is not limited to the example.

First, the Japanese document "I" shown in FIG. 18 is converted into black-and-white gradation image data using an image input device. FIG. 19 (a)
As shown in (2), the black area inside the image is
Set to 56 gradations. At this point, the image density outside the area is zero (FF in 8-bit hexadecimal notation) as shown in FIG.
It is.

Next, as shown in FIG. 20 (a), the white area outside the area is subjected to circular blur processing from the center of the grid to the outside to obtain 256 gradations. In FIG. 20 (b), 2
It can be seen that 56 gradation data is added. The image density is FF in 8-bit hexadecimal notation for the brightest part, and is 00 in 8-bit hexadecimal notation for the darkest part.

In order to adjust the image line thickness of the Japanese document "Ichi", the 256 gradation data is arbitrarily changed as shown in FIG. 21B, or by using commercially available image processing software. Figure
If the image of FIG. 21A is directly modified, a rectangular array having an optimum 256 gradation density can be obtained.

The rectangular array data having 256 gradation densities (from 00 to FF in 8-bit hexadecimal notation) obtained in FIG. 21B is converted into data that can be decoded by a dot generator, and the film is output. . The rectangular array data having 256 gradation densities is a critical value for judging on / off (black, white) in each grid of halftone dots. 0 means black, FF means white, and the continuous level to be applied. If the tone of the toned image is darker (smaller) than the numerical value for judging on / off (black, white) in each grid shown in FIG. 21B, the grid of halftone dots is turned on.

As a second embodiment, FIG. 26 shows a modification of the first embodiment. In the character portion of FIG. 26, a crossing portion Z ₁ , in the blurring process of the first embodiment,
, Resulting in a non-uniform concentration distribution. So figure
At the time of image synthesis of both 22 and 23 as an example, as shown by the dashed line in FIG. 24, blurring is performed at an acute angle to prevent the image area of the intersection area that is likely to occur at the time of printing from being collapsed, so that readability and Improve dot quality.

The improved embodiment 1, in Figure 26 Z ₂ is
By dispersing the density outside the character area, the gradation from the middle to the bright part is reproduced more smoothly.

Further, in FIG. 26 Z ₃ , a zero-density (FF) area of several pixels is assigned to the outline area of the character. By providing an unfilled gap between the inside and the outside of the character, it becomes possible to observe character information having a fine structure from the bright part to the dark part.

FIG. 27 shows a printed matter p obtained in this example. While the thickness of the strokes of the Japanese typeface "Ichi" gradually increased,
In addition, characters can be observed even in the dark area.

In the third embodiment, a gradation expression can be obtained by halftone-dotting not only the single logo mark and typeface but also a plurality of Japanese document types such as a company name, a slogan, and a warning sentence.
According to this embodiment, in FIG. 28, the gradation is expressed while the thickness of the image line of the Japanese document “print office” gradually increases. Also,
In FIG. 29, the gradation is expressed by a Japanese document type “copy prohibited”.

In Example 4, an intermediate product as a film-making screen can be prepared, and a halftone dot structure corresponding to the amount of transmitted light can be obtained by an optical method using the screen. This is a kind of blur screen. When the produced film is observed with a microscope, the blur spots of light and shade described in the above-mentioned embodiment are alternately connected. The center of the black point has the highest density, and the center of the white point has the lowest density and is transparent.

An arbitrary halftone dot film can be obtained by using it on the focal plane of a plate making camera or a photo enlarger equipped with a vacuum device and exposing it in close contact with the front surface of a high-resolution hard plate making film (lith film). . In this case, the amount of light transmitted through the screen varies depending on the density of the original to be used, and this, together with the magnitude of blackening of the lith film, enables optically creating continuous tone dots.

The tone reproduction method for preventing forgery according to the present invention has been described above. Next, the original film and printed matter obtained by the present invention will be described.

Using the continuous tone image shown in FIG. 30, a printing plate is formed on a film original (halftone) obtained as a result of the above-described halftone dot forming method, and a printed material printed using the printing plate is formed. The enlarged photograph of the left eye portion e reproduces a continuous tone image while modulating the line width of the Japanese document "Ichi" as shown in FIG.

Such a printed matter has a resolution of 80 to 175 lines / inch, which is the same level as that of a general printed matter, so that the naked eye does not notice that the printed matter is composed of halftone dots in consideration of design. It is clear (FIG. 31 (b)
Will be described later).

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.
Any trademark or logo can be given to any continuous tone image as halftone dots. In addition, the present invention, such as banknotes and securities,
For objects requiring forgery prevention, the object can be achieved only by applying the present invention to a very small area even if the space is limited.

[0041]

As is apparent from the above description, according to the forgery prevention tone reproduction method according to the halftone dot creation method of the present invention, FIG. As described above, the halftone dot of the Japanese document "Ichi" disappears and becomes unreadable.

Further, when a halftone dot is duplicated, moire for scanning input / output is generated, and the duplicated product can be determined at a glance by a remarkable gradation defect, so that it is difficult to restore the gradation defect. It is possible to prevent counterfeiting beforehand, and it plays a large role as a counterfeiting prevention measure.

Further, as an example of the above-mentioned machine reading in the present invention, for example, in a bill discrimination reading portion of a vending machine or the like, a halftone dot (for example, the Japanese document "I") of the narrow area is read by a CCD camera or the like. By performing image processing such as reading, pattern matching, and the like, there can be cited an example in which automatic and high-speed authenticity determination can be performed in comparison with visual authentication.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining that as an example of a dot which can be given in the present invention, a dot shape itself can freely adopt a trademark, a family crest, a symbol mark, a character, or the like that has its own meaning. FIG.

FIG. 2 is a diagram illustrating 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 the halftone creation 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 creation method of the present invention.

FIG. 9 is a flowchart for explaining a halftone dot creation method corresponding to claims 1, 9, and 17 according to the present invention.

FIG. 10 is a diagram for explaining, by a flowchart, a halftone dot creation method corresponding to claims 2, 10, and 18 according to the present invention.

FIG. 11 is a flowchart for explaining a halftone dot creation method corresponding to claims 3, 11, and 19 according to the present invention.

FIG. 12 is a diagram for explaining, with a flowchart, a halftone dot creation method corresponding to claims 4, 12, and 20 according to the present invention.

FIG. 13 is a diagram for explaining, by a flowchart, a halftone dot creation method corresponding to claims 5, 13, and 21 according to the present invention.

FIG. 14 is a diagram for explaining, by a flowchart, a halftone dot creation method corresponding to claims 6, 14, and 22 according to the present invention.

FIG. 15 is a diagram for explaining, by a flowchart, a halftone dot creation method corresponding to claims 7, 15, and 23 according to the present invention.

FIG. 16 is a flowchart for explaining a halftone dot creation method corresponding to claims 8, 16, and 24 according to the present invention.

FIG. 17 is a diagram for explaining, in a flowchart, a halftone dot creation method according to the first embodiment.

FIG. 18 is a diagram illustrating an example of halftone dots added in the first embodiment, in which a Japanese document “Ichi” is applied.

FIG. 19 is a diagram for describing that the inside of the image of the halftone dot document “I” given in the first embodiment is blurred to 256 gradations.

FIG. 20 is a diagram for explaining a process of blurring the outside of the image of the halftone dot document “I” given in the first embodiment to 256 gradations.

FIG. 21 is a diagram for explaining that it is possible to add correction to the entire area of the halftone dot document “I” added in the first embodiment.

FIG. 22 is a diagram illustrating an image before forming an intersection in order to explain a sharp blur processing for an intersection area inside an image line in the second embodiment.

FIG. 23 is a diagram illustrating an image before forming an intersection in order to explain a sharp blur processing on an intersection region inside an image line in the second embodiment.

FIG. 24 is a diagram illustrating a state of a sharp blur processing at a position where an object forms an intersection.

FIG. 25 is a flowchart for explaining a halftone dot creation method according to the second embodiment.

FIG. 26 is a diagram (Z ₁ ) illustrating the state of sharp blur processing for a region where an object forms an intersection with a Japanese document “I” as an example, and as a gradation expression other than a character region. (Z ₂ ) explaining a method of dispersing the density, and 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. (Z ₃ ).

FIG. 27 is a printed matter illustrating a tone reproduction example obtained in Example 2.

FIG. 28 is a halftone print of a Japanese document “print office” as an example in which a halftone dot is formed using a company name, a slogan, a warning sentence, a logo mark, and the like as components in the third embodiment.

FIG. 29 is a diagram illustrating a printed material in which a Japanese document “copy prohibited” is halftoned as an example in which a halftone dot is formed by using a company name, a slogan, a warning sentence, a logo mark, and the like as components in the third embodiment.

FIG. 30 is a continuous tone image used in Example 2 to obtain a halftone screen having designability.

31e is a partially enlarged photograph of a continuous tone image composed of halftone dots that is not reproduced by a copying machine or the like, taking into account the design properties obtained by the present invention, and FIG. Figure (a) illustrating the observed halftone dot document "Ichi",
The printed matter obtained by the present invention is processed by the plate making input / output device, and in the enlarged photograph of the duplicate obtained after printing the plate, the halftone dot of the Japanese document "I" disappears and is unreadable. FIG.

[Explanation of symbols]

1. An image input unit for reading an image having a meaningful design, such as a trademark, a family crest, a symbol mark, a character, etc. 2. An outline extraction processing unit of an input image 3. The inside of the outline is blurred to perform multi-gradation. Image processing unit 3 'Image processing unit that performs internal sharp blur processing on the area where the objects form intersections 4 Image processing unit that performs blur processing on the outside of the contour to obtain multiple gradations 4' External density dispersion processing on the outside of the contour An image processing unit for multi-gradation 5 An image processing unit for allocating a zero-density region of several pixels to a contour region 6 A processing unit for converting the obtained image data into a PostScript command that can be decoded by an output device 7 For a halftone generation device by blurring the intersection area Z ₁ acute-angled section Z in printing on uneven concentration distribution (collapse streaks) prone character portions providing instructions, uneven concentration distribution (streaked Collapse) by dispersing the intersection area Z ₂ character area outside of the concentration of the character portion which prevented the concentration zero smoothly reproduced regions Z ₃ few pixels the gradation of a bright portion from the middle to (FF) space allocation The outline of an input image having a design property is extracted, the inside of the outline is blurred, the inside of the intersection is sharpened, the outside of the outline is subjected to external density dispersion processing, and the A printed matter composed of components (dots) output by allocating a pixel density of zero (FF) area, internally blurring the inside of an input image having a p 'design property, and internally sharpening the intersection area of the image line; A printed matter composed of components (halftone dots) output by performing external density dispersion processing on the outside of the input image. E Extracting the contour of the input image having a design property, blurring the inside of the contour, and setting the inside of the image at the intersection area Sharp blur The left-eye portion of the printed matter consisting of components (dots) output by processing the outside of the contour to external density distribution and allocating a zero density (FF) area of several pixels to the contour area and outputting

Claims (34)

[Claims] 1. A trademark, a family crest, a logo mark, a symbol mark, a character, and the like are input images corresponding to one halftone pixel,
A halftone screen creating method, characterized in that halftone dots are constituted by components obtained by performing internal blur processing inside the image of the input image. 2. An input image corresponding to one halftone pixel, wherein a trademark, family crest, logo mark, symbol mark, character, or the like is used as an input image.
A halftone screen creating method, characterized in that halftone dots are formed by components obtained by external blurring processing or external density dispersion processing outside the image of the input image. 3. An input image corresponding to one halftone pixel, wherein a trademark, a family crest, a logo mark, a symbol mark, a character, and the like are used as an input image.
A halftone screen creating method, characterized in that internal blurring is performed inside the image of the input image, and halftone dots are formed by components obtained by performing internal sharp blurring at intersections of the image of the input image. 4. An input image corresponding to one halftone pixel, wherein a trademark, family crest, logo mark, symbol mark, character, etc.
A halftone screen creation characterized by internally blurring the inside of the image of the input image and forming a halftone dot by using components obtained by performing external blurring or external density dispersion processing outside the image of the input image. Method. 5. An input image corresponding to one halftone pixel, wherein a trademark, a family crest, a logo mark, a symbol mark, a character, and the like are set as an input image.
Internal blur processing is performed inside the object of the input image, internal sharp blur processing is performed at the intersection of the object of the input image, and external blur processing or external density dispersion processing is performed outside the object of the input image. A halftone screen creating method, wherein a halftone screen is constituted by components. 6. An input image corresponding to one halftone pixel, wherein a trademark, a family crest, a logo mark, a symbol mark, a character, and the like are set as an input image.
Extracting the contour area of the input image, performing external blur processing or external density dispersion processing outside the image line of the input image, and assigning a density-zero area of several pixels to the contour area of the input image. A method for producing a halftone screen, comprising halftone dots. 7. An input image corresponding to one halftone pixel, wherein a trademark, family crest, logo mark, symbol mark, character, or the like is used as an input image.
Extracting the outline region of the input image, performing internal blur processing inside the image of the input image, performing external blur processing or external density dispersion processing outside the image of the input image, and adding several pixels to the outline region of the input image. A halftone screen using a component obtained by allocating a zero density area. 8. An input image corresponding to one halftone pixel, wherein a trademark, family crest, logo mark, symbol mark, character, or the like is used as an input image.
Extracting the contour region of the input image, performing internal blur processing inside the object of the input image, performing internal sharp blur processing at the intersection of the object of the input image, and performing external blur processing outside the object of the input image. Alternatively, a halftone screen creating method is characterized in that halftone dots are formed by components obtained by performing external density dispersion processing and allocating a zero-density area of several pixels to an outline area of the input image. 9. An n × n block in which n rows of company names, slogans, warning texts, logo marks and the like consisting of n characters repeated in the horizontal direction are arranged in n rows while being shifted one character at a time in the horizontal direction. N × n obtained as an input image corresponding to the pixel and internally blurred inside the image of the input image
A halftone screen creating method, characterized in that halftone dots are constituted by constituent elements of blocks. 10. An n × n block in which n rows of company names, slogans, warning texts, logo marks and the like consisting of n characters repeated in the horizontal direction are arranged in n rows while being shifted one character at a time in the horizontal direction. A halftone screen is prepared by forming an input image corresponding to a pixel and forming a halftone dot by using constituent elements of nxn blocks obtained by external blurring processing or external density dispersion processing outside the image line of the input image. Method. 11. An n × n block in which n rows of company names, slogans, warning texts, logo marks and the like consisting of n characters repeated in the horizontal direction are arranged in n rows while being shifted one character at a time in the horizontal direction. The input image corresponding to the pixel, n is obtained by performing internal blur processing inside the image of the input image and performing internal sharp blur processing at the intersection of the image of the input image.
A halftone screen creating method, characterized in that halftone dots are constituted by components of × n blocks. 12. An n × n block in which n rows of company names, slogans, warning texts, logo marks, etc., consisting of n characters repeated in the horizontal direction, are arranged in n rows while being shifted one character at a time in the horizontal direction. The input image corresponding to the pixel, the internal blur processing inside the image of the input image, the external blur processing outside the image of the input image or external density dispersion processing by the components of the n × n block obtained by A method for producing a halftone screen, comprising halftone dots. 13. A halftone dot is composed of n × n blocks in which company names, slogans, warning texts, logos and the like consisting of n characters repeated in the horizontal direction are arranged in n rows while being shifted in the horizontal direction one character at a time. As an input image corresponding to pixels, internal blur processing is performed inside the object of the input image, internal sharpening processing is performed at an intersection of the object of the input image, and external blur processing or external processing is performed outside the object of the input image. A halftone screen creating method, characterized in that halftone dots are constituted by constituent elements of nxn blocks obtained by density dispersion processing. 14. An n × n block in which n rows of company names, slogans, warning texts, logo marks, etc., consisting of n characters repeated in the horizontal direction, are arranged in n rows while being shifted one character at a time in the horizontal direction. As the input image corresponding to the pixel, the contour area of the input image is extracted, external blur processing or external density dispersion processing is performed outside the object line of the input image, and a density zero area of several pixels is provided in the contour area of the input image. A halftone screen creating method, characterized in that halftone dots are formed by using constituent elements of nxn blocks obtained by allocation. 15. An n × n block in which n rows of company names, slogans, warning texts, logo marks and the like consisting of n characters repeated in the horizontal direction are arranged in n rows while being shifted one character at a time in the horizontal direction. As an input image corresponding to pixels, extract the contour region of the input image, perform internal blur processing inside the image of the input image, perform external blur processing or external density dispersion processing outside the image of the input image, A halftone screen creating method, characterized in that a halftone screen is constituted by constituent elements of n × n blocks obtained by allocating an area of zero density of several pixels to an outline area of an input image. 16. An n × n block in which n rows of company names, slogans, warning texts, logo marks, etc. composed of n characters repeated in the horizontal direction are arranged in n rows while being shifted one character at a time in the horizontal direction. An input image corresponding to a pixel, a contour region of the input image is extracted, an internal blur is performed inside an object of the input image, and an internal sharpening is performed at an intersection of the object of the input image, and the input image is sharpened. External blur processing or external density dispersion processing outside the object line, and halftone dots are formed by components of nxn blocks obtained by allocating a density zero area of several pixels to the contour area of the input image. To create a halftone screen. 17. An n × n block in which n rows of company names, slogans, warning texts, logo marks and the like consisting of n characters repeated in the vertical direction are arranged in n columns while being shifted one character at a time in the vertical direction. An input image corresponding to a pixel, and nx obtained by performing internal blur processing inside an image line of the input image
A halftone screen creating method, wherein halftone dots are constituted by n blocks of components. 18. An n × n block in which n rows of company names, slogans, warning texts, logo marks, etc. composed of n characters repeated in the vertical direction are arranged in n columns while being shifted one character at a time in the vertical direction. A halftone screen is prepared by forming an input image corresponding to a pixel and forming a halftone dot by using constituent elements of nxn blocks obtained by external blurring processing or external density dispersion processing outside the image line of the input image. Method. 19. An n × n block in which n rows of company names, slogans, warning texts, logo marks, etc. consisting of n characters repeated in the vertical direction are arranged in n columns while being shifted one character at a time in the vertical direction. The input image corresponding to the pixel, n is obtained by performing internal blur processing inside the image of the input image and performing internal sharp blur processing at the intersection of the image of the input image.
A halftone screen creating method, characterized in that halftone dots are constituted by components of × n blocks. 20. An n × n block in which n rows of company names, slogans, warning texts, logo marks, and the like consisting of n characters repeated in the vertical direction are arranged in n columns while being shifted one character at a time in the vertical direction. The input image corresponding to the pixel, the internal blur processing inside the image of the input image, the external blur processing outside the image of the input image or external density dispersion processing by the components of the n × n block obtained by A method for producing a halftone screen, comprising halftone dots. 21. An n × n block in which n rows of company names, slogans, warning texts, logo marks and the like consisting of n characters repeated in the vertical direction are arranged in n columns while being shifted one character at a time in the vertical direction. As an input image corresponding to pixels, internal blur processing is performed inside the object line of the input image, internal sharpening processing is performed at the intersection of the object lines of the input image, and external blur processing or external processing is performed outside the object line of the input image. A halftone screen creating method, wherein halftone dots are constituted by constituent elements of nxn blocks obtained by the density dispersion processing. 22. An n × n block in which n rows of company names, slogans, warning texts, logo marks and the like consisting of n characters repeated in the vertical direction are arranged in n columns while being shifted one character at a time in the vertical direction. As the input image corresponding to the pixel, the contour area of the input image is extracted, external blur processing or external density dispersion processing is performed outside the object line of the input image, and a density zero area of several pixels is provided in the contour area of the input image. A halftone screen creating method, characterized in that halftone dots are formed by using constituent elements of nxn blocks obtained by allocation. 23. An n × n block in which n columns of a company name, a slogan, a warning sentence, a logo mark, etc. composed of n characters repeated in the vertical direction are arranged in n columns while being shifted one character at a time in the vertical direction. As an input image corresponding to pixels, extract the contour region of the input image, perform internal blur processing inside the image of the input image, perform external blur processing or external density dispersion processing outside the image of the input image, A halftone screen creating method, characterized in that a halftone screen is constituted by constituent elements of n × n blocks obtained by allocating an area of zero density of several pixels to an outline area of an input image. 24. An n × n block in which n rows of company names, slogans, warning texts, logo marks and the like consisting of n characters repeated in the vertical direction are arranged in n columns while being shifted one character at a time in the vertical direction. An input image corresponding to a pixel, a contour region of the input image is extracted, an internal blur is performed inside an object of the input image, and an internal sharpening is performed at an intersection of the object of the input image, and the input image is sharpened. External blur processing or external density dispersion processing outside the object line, and halftone dots are formed by components of nxn blocks obtained by allocating a density zero area of several pixels to the contour area of the input image. To create a halftone screen. 25. A halftone screen creating method according to claim 1, further comprising an image processing section for inverting the input image to form a halftone dot. 26. The half method according to claim 1, further comprising an image processing section for inverting the gradation of the image data obtained through all the processes, thereby forming a halftone dot. How to create a tone screen. 27. A contact screen film for plate making produced by the method for producing a halftone screen according to claim 1. Description: 28. An original plate for plate making produced by the method for producing a halftone screen according to any one of claims 1 to 26. 29. An original plate for making a plate produced by the contact screen film for plate making according to claim 27. 30. A printing plate prepared by the method for producing a halftone screen according to claim 1. Description: 31. A printing plate made from the plate-making contact screen film according to claim 27. 32. A printing plate prepared by using the film master for plate making according to claim 28 or 29. 33. A printing method for printing a special halftone dot using the printing plate according to claim 30. 34. A printed matter having a special halftone dot created by the printing method according to claim 33.