CN101480891A - Method for hiding print character - Google Patents

Abstract

The invention relates to a printed character concealing method. A body is a color printing system using pigment three primary colors and black pigment as basic color systems, a printed object is a red seal imprinting image, and a significant digital code for further illustrating the attribute of the image is required to be inlaid into the image. The printed character concealing method is characterized in that magenta pigment ink in the pigment three primary colors is taken as pigment for color of the inlaid significant digital code. The invention utilizes the characteristics of visual color sense of human to realize the printing concealing technology effect of digital characters in seal imprint, and can utilize the prior printing technology system to carry out seal anti-counterfeiting to further popularize the digital seal anti-counterfeiting technology.

Description

A kind of method for hiding print character

Technical field:

The invention belongs to printing technology, comprise the printing technology of using industrial printing machine or desktop publishing system, especially use the pigment three primary colors (printing three primary colors) of four-color process technology in the finger mark brush technical field, promptly green grass or young crops (blue-green) (cyan), pinkish red (carmetta) (magenta), yellow (yellow) is the color technology of printing colour system.

Background technology:

In the printing technology, printing press combines with printing-ink, can show natural rich colors on paper, and wherein printing-ink must be finished with the pigment three primary colors, that is: blue or green (cyan blue-green), purple (magenta reddish violet), yellow (yellow).

In the printing technology, the single color printing machine develops into the four-color process machine, the nineties in last century, colored desktop publishing is invented, this novel printing equipment, be made up of desktop color separation and desktop electronic publishing two parts, be divided into three parts such as input, processing processing and output on the general structure, the output equipment of colored desktop publishing includes various desktop digital colored printers.

In the human society, people carry out the exchange of ownership thing, and except that direct barter, major part needs certain file of signature, and the figure of use representative oneself is as credit token.After Ancient Chinese is for the papermaking technology invention, with an official seal affixed on paper, in worldwide, become a kind of known credit token; at all times; many technical specialists in the method for seeking protection credit file, forge document to avoid other people, damage real obligee's interests.

Chinese patent file ZL03102354.1 discloses " a kind of electronic signature seal method ", its core technology is to embed digital sign in a kind of seal image of versatility, further specify the attribute of this seal image, to strengthen the ownership power of seal mark, this method serves as to implement purpose to solve anti-counterfeit of seals.

Chinese patent open file CN101163007 discloses " credit sign accidental streakline generating method ", use is converted into data character the method for streakline, the seal impression image of mark versatility, to further specify the attribute of this seal mark, it serves as to implement purpose that this method comprises seal false proof at interior credit token with solution.

The described technical scheme of above-mentioned patent publication is used the method that increases digital authenticating in the pattern-recognition image, solves the problem of forging credit token, is the measure of a kind of anti-counterfeiting technology of credit token effectively.

As general knowledge, in the seal practical application, seal with combine with the India side formula, can on object, form a kind of credit token.Seal is a kind of mould with physical aspect, is carved with figure and word on its cross section, coats oil colour at figure with the one side of word, just can stick last figure and word on paper, also just formed we seen " Yin Wen ".

In China's traditional culture in several thousand, it is single redness that this seal literary composition requires, and the Chinese government has also stipulated that with the technical standard form seal will use single redness, in the figure of this single red color sign, can not mix other color.

These characteristics in conjunction with seal, under existing printing technology condition, the enforcement of above-mentioned patent disclosure technical scheme, undoubtedly with the traditional culture requirement, national technical standard is incompatible, that is: want to realize the technical scheme of patent publication, will in the seal impression pattern, add the number that is used for false proof discriminating, if in seal impression, add the number that vision can be seen, these digital just must uses and red distinguishing other color, as a result, seal impression has just become variegated seal literary composition, runs counter to pure red cultural tradition of seal and national technical standard regulation, people and market can not accepted, and implement just nonsensical; Otherwise if the false proof digital red color printing the same with the seal impression color of using, then people's vision does not see Chu again, and technical scheme can't realize.

For addressing this problem, Chinese patent open file CN1580961 disclosed " a kind of preparation method of red ink powder " in 2004, this technical method is, in the used red pigment ink powder of desktop color laser printer, add fluorescent material, the red ink powder that adds fluorescent material is packed in green grass or young crops (cyan blue-green) print cartridge of color laser printer, when electronic composition, is the definitions of color of the false proof number in the seal impression blue or green (cyan blue-green) look, after printer interface is received this colour instruction, drive green grass or young crops (cyan blue-green) the look print cartridge work of printer, make the false proof number in the fluorescent red ink powder transfer printing seal impression in this print cartridge.

The seal impression that this mode of printing is printed, false proof digital use wherein contains the red ink powder printing of fluorescent material, under normal lamp, people's vision can not be seen these false proof numbers, but under the irradiation of special light sources, fluorescent material is inspired fluorescence, and people's vision promptly can be clear that the false proof number of hiding in the seal literary composition.

Use this fluorescent red pigment ink powder, printing is embedded in the false proof digital character in the seal literary composition in the desktop color printer, can solve the implementation issue of above-mentioned patented technology scheme within the specific limits, Korea S Samsung Electronics cooperated with capital, domestic Beijing origin new and high technology Co., Ltd in 2005, in color laser printer, used this technology, product is brought into use at first in China Zhejiang Province the whole province court system, and popularize at home gradually, become the affix one's seal method of file of a kind of printing of seal applying unit acceptable.

This method, the technology that has solved patent document 03102354.1 disclosed " a kind of electronic signature seal method " realizes, but has also brought another problem.

In the use of desktop printing press, color printer for example, because the green pigment China ink in four looks is replaced with for the red fluorescence pigment inks, the pigment inks that in the normal pigment three primary colors, has just lacked a reference colour, thereby can not utilize the desktop printing press to print the image of other realistic colour, can only use as a kind of special equipment.

In sum, we draw following conclusion:

1, seal is as a kind of product of specific use, and the seal impression that requires to add a cover on paper is single redness;

2 and seal impression as credit token, the most effective anti-counterfeiting technology is to realize the digitized authentication of seal;

3, requiring seal impression to keep under the condition of red appearance effect, adding in the seal impression false-proof digital to and need do stealth technique and handle;

4, using the purpose of false proof number is the true and false of checking the checking seal, and the false proof number that stealth technique is handled must be able to be shown one's color again and be checked, reality need and the seal digital anti-counterfeiting between formed contradiction;

5, analyze from chromatics, use the pigment three primary colors in the existing printing technology, realize false proof number in the seal impression should " stealth " again human eye check, be impossible realize.

Goal of the invention:

The objective of the invention is, utilize the employed universal pigment three primary colors of printing technology, realize in the seal impression that false proof digital character not only can " stealth " but also the check technical effects of can " showing one's color ".

According to goal of the invention, implemented the experiment of selectivity printing technology:

Use the used four-color press in printing house to do the experiment of pigment three primary colors coupling, finally we find, when definite seal impression is red, when being programmed in false proof digital color in the seal frame and selecting to use magenta pigment, under indoor light source, people's vision is checked unclear, further adjusts the print dot density of false proof number, under visual, can realize " stealth " of false proof number;

The problem that needs further to solve be, under what conditions, check the number of knowing that these " stealths "?

Select the various light sources of experiment, finally under artificial ultraviolet source, these " stealth " numbers are shown one's color, people's vision can be seen clearly, then the crime detection ultraviolet scanner that uses China Material Evidence Identification Center, Ministry of Public Security to produce, scanning contains the seal impression of " stealth " false proof number, has obtained false proof clearly digital seal impression electronic image files in computer.

The pigment three primary colors data transaction of four-color process machine in desktop publishing system, is used color printer output experimental result, obtain the technique effect of same " stealth " and " showing one's color ".

According to above-mentioned experiment effect, the reason that technique effect is realized further is discussed theoretically, be the pigment basis with the pigment three primary colors, the condition that is implemented in the digital character of printing concealed anti-false in the red seal impression is as follows:

1. the pigment three primary colors possess available condition:

On chromatic diagram, green spectral coloured light does not have corresponding with it complementary wavelength, because the complementary color of this wavelength coloured light is the color of pinkish red colour system, and pinkish red colour system color is not monochromatic light in the spectrum chromatic diagram, it is the mixed-color light of ruddiness and blue light, because do not have the complementary wavelength of green spectral coloured light on chromatic diagram, therefore, the magenta color is referred to as extra-spectrum colo(u)r.

Magenta is as the mixed-color light of ruddiness and blue light, and the basic condition that " stealth " effect realizes is: the redness of mixing in the pinkish red coloured light by chance is exactly the redness of seal impression requirement;

But these two Essential colour have obvious difference after all, and why it can " stealth ", mainly condition below the dependence.

2. people's vision color sensation possesses available condition:

The art worker knows, people's vision color sensation is to be subjected to object color (solid colour of represented object), ambient color (object color on every side), light source colour (outdoor sunlight, indoor natural light, artificial light) three to influence down and form.Ambient color and light source colour mainly are the contrasts of ambient color and object color as the factor of ectocrine body colour, cause the variation of object color.For example: magenta and green is arranged side by side, can demonstrate that magenta is redder, green is greener, this is because cause its complementary color green and magenta respectively at magenta and the green edge of handing-over each other, has strengthened the color of color separately, produces redder, the green greener phenomenon of magenta.

Color contrast can be so that each color produces and the opposite opposite color of self color form and aspect around oneself, and in fact this opposite color does not exist, and it is the complementary color that visual illusion causes that its phenomenon produces.For example, during the black and white individualism, can't seem white very white, black very black, if but both are put together, just have white very white, black very black phenomenon, this is to strengthen the illusion that the contrast effect causes.

The color sensation of people's vision to ambient color and object color can be strengthened in the zone that ambient color and object color edge intersect, and equally also can weaken the color sensation of people's vision to ambient color and object color; If the area of object color is less than ambient color, then just there is the trend of being flooded by ambient color in object color, if include the color component identical in the object color with ambient color, then can strengthen the trend that this floods, the red ambient color of seal impression has flooded the pinkish red solid colour of false proof number, has just realized that also we want " stealth " purpose that reaches.

3. the artificial light sources interference is the condition of " showing one's color ":

The false proof digital magenta pigment of using in the red seal impression belongs to purple series, and does not have natural daylight in the artificial ultraviolet source of selecting to use, and under this UV-irradiation, the original redness of seal impression does not manifest, and shows as crineous; Equally, magenta the width of cloth of purple light according under, blue tendency is enhanced, thereby makes the color of seal impression and the color of false proof number wherein form tangible aberration in vision, i.e. our " showing one's color " effect of seeing.

Summary of the invention:

A kind of method for hiding print character, it is the colored printing system of basic colour system that its body is to use pigment three primary colors and black pigment, printing object is the image of red seal impression, and require in this image, to embed the significant digital character that further specifies this image attributes, it is characterized in that with the magenta pigment China ink in the pigment three primary colors being the pigment of color of the significant digital character of embedding.

A kind of stealthy treatment system of print character is characterized in that comprising as lower device:

The stealthy printing equipment of digital character, it is the colored printing system of basic colour system that body is to use pigment three primary colors and black pigment, the image that is used for printing red seal impression embeds the significant digital character that further specifies this image attributes, it is characterized in that with the magenta pigment China ink in the pigment three primary colors be the pigment of the significant digital character color of embedding.

Specific implementation method:

1, false proof digital character stealth technique is handled:

With the desktop publishing system is example, when computer editing and composing carries the seal impression of false proof digital character, with the definitions of color of false proof digital character is the magenta pigment colour, and with red seal impression image synthetic after, send into the output equipment of desktop publishing system together, be color printer, and be printed onto on the paper.

2, the stealthy effect of false proof digital character is judged:

Under indoor light source, people's vision can not clearly be distinguished the number that uses the magenta pigment ink print in red image, the stealthy success of false proof digital character.

3, the false proof digital character technical finesse of showing one's color:

Use the artificial light sources ultraviolet light, excite the false proof digital character of this use magenta pigment ink print, visually can clearly distinguish, distinguish character.

The invention advantage:

The present invention utilizes people's vision color sensation characteristics and the edge of pigment three primary colors different color The phototropic effect in conjunction with exciting of ultraviolet light, has realized the stealth technique effect of print character, Effectively utilize existing printing technology system and carry out anti-counterfeit of seals, be beneficial to further popularization and application number Word anti-counterfeit of seals technology.

Claims (2)

1. method for hiding print character, it is the colored printing system of basic colour system that its body is to use pigment three primary colors and black pigment, printing object is the image of red seal impression, and require in this image, to embed the significant digital character that further specifies this image attributes, it is characterized in that with the magenta pigment China ink in the pigment three primary colors being the pigment of color of the significant digital character of embedding.

2. the stealthy treatment system of a print character is characterized in that comprising as lower device:

The stealthy printing equipment of digital character, it is the colored printing system of basic colour system that body is to use pigment three primary colors and black pigment, the image that is used for printing red seal impression embeds the significant digital character that further specifies this image attributes, it is characterized in that with the magenta pigment China ink in the pigment three primary colors be the pigment of the significant digital character color of embedding.