CN1256467A

CN1256467A - Image concealing technology and product

Info

Publication number: CN1256467A
Application number: CN 99120157
Authority: CN
Inventors: 陈金明
Original assignee: BAOZHEN SCIENCE AND TECHNOLOGY DEVELOPMENT Co Ltd GUANGZHOU CITY
Current assignee: BAOZHEN SCIENCE AND TECHNOLOGY DEVELOPMENT Co Ltd GUANGZHOU CITY
Priority date: 1999-09-06
Filing date: 1999-09-06
Publication date: 2000-06-14

Abstract

On the basis of maintaining the original image, some image may be concealed in various visual frames and the concealed image may be restored via grating for display by means of digital technology. The concealed image has very strong anti-fake property, security property and camouflage property and may be used widely in various fields needing anti-fake, security and camouflage.

Description

Image concealing technology and goods thereof

The present invention relates to that digital image is handled, technical fields such as seal pre-treatment, printing, false proof, papermaking, standard national currency, military image, software, protection of Intellectual Property Rights, confidential corespondence, entitlement authentication.

More common the having of stealth technique at present: traditional papermaking watermark and printing ink class invisible false proof technique.

Traditional papermaking watermark is when copying paper in the process of papermaking, stealthy image making in paper.This watermark Direct observation is sightless, need just can see latent image by transmission.Traditional papermaking digital watermark is widely used in bank note, ticket, license or the like.The weak point of this technology is that the technical costs and the production cost of the special-purpose water marked paper of manufacturing is too high, is born by the sole user fully.

The employed printing ink of printing ink class invisible false proof technique can be divided into two big classes: concealed fluorescent printing ink, stealthy heat-sensitive colour-changing ink.Use concealed fluorescent printing ink or stealthy heat-sensitive colour-changing ink that anti-counterfeiting mark is added and be imprinted on the printed matter, these printed matters just become the concealed anti-false printed matter.At present, also have many packings of product, label, books and periodicals, certificate, ticket, currency all using printing ink class invisible false proof technique.This class concealed anti-false printed matter must just can be watched anti-counterfeiting mark with the instrument of special use, but its anti-counterfeiting mark is apparent mostly coarse and unstable, is difficult to clear and definite eye impressions of people, so people just are difficult to accurately differentiate its true and false.If the fake producer buys same printing ink, the vacation of copying out so packing just must be to look genuine.

The background technology relevant: special screening anti-counterfeiting printing technology, concealed sign anti-counterfeiting technology, digital image treatment technology, colored printing technology, grating technology with the present invention.

The purpose of image concealing technology is: a kind of both had extremely strong antifalsification, confidentiality and camouflage are provided; can allow the people with the naked eye can observed easily visual latent image again by grating; thereby differentiate that it is true and false; be beneficial to protection of Intellectual Property Rights, all authorities authentication, hit the printing imitation behavior, ensure safe, the camouflage that ensures the military equipment sign hidden fully of confidential corespondence, protect the legitimate rights and interests of all trades and professions conscientiously.

The present invention has fully used image digital processing technique most advanced in the world today, has combined special screening anti-counterfeiting printing technology, invisible anti-counterfeit mark technology, stationery reprocessing technology and grating technology, latent image is hidden in dexterously in the stealthy zone of surface image, thereby image is become have the latent image of extremely strong antifalsification, confidentiality and camouflage, to adapt to various needs.Now specify its basic technical scheme:

1, design surface image layout and selected stealthy zone:

(1) planar design mode is routinely used various image making means, designs and make the whole space of a whole page of surface image, and the name file is Biaomian. ^*

(2) some comparatively smooth zone of the selected surface image space of a whole page is stealthy zone, extracts one of them color code by colour splitting system, and cuts out by the stealthy zone of decide, and filing is stealthy regional document Quyu.GIF;

2, design and produce latent image:

(1) determines latent image according to specific requirement.The feature of latent image is stratified vision imaging, the vision imaging that will see when being check, and content can comprise picture, trademark, trade name, unit symbol, title, other literal, pattern etc.

(2) according to actual conditions, can use different image processing meanses such as scanning, typewriting, hand drawing, latent image is made the image file of grayscale mode, name is filed and is Yinxing.GIF.

3, make self-defined screening dot matrix image file:

(1) open the image processing program that has self-defined screening function (as Potoshop etc.), make a black and white contrast polarization (distribution that is black and white is not the center symmetry, but can be rotational symmetry, as

) the blank pattern of " site point array element ", name is filed and is Md0.GIF

(2) utilization various image effect functions or instrument (as fuzzy, virtualization, spray, color in etc.) " unit, site " is made into the abundantest gray level image of level, and the name file is the first screening lattice file Md1.GIF;

(3) reopening site blank pattern file Md0.GIF, use Move tool to move site blank pattern, like this, just there has been skew to a certain degree at the center of site blank pattern.

(4) finish the various operations of written or printed documents repeating step (3), promptly can be made into the second screening lattice file Md2.GIF;

(5) the repeatedly various operations of repeating step (3), (4) promptly can be made into the 3rd to N screening lattice file Md3.GIF ... MdN.GIF.Step-length that moves when it should be noted that move operation and direction should be consistent.

4, hiding of stealthy image:

(1) successively first, second, third ... N screening dot matrix image is defined as self-defined screening dot matrix, one of them color code to stealthy area image file Quyu.GIF, successively carry out self-defined screening and handle, resulting Screening Image save as respectively successively Quyu1.GIF, Quyu2.GIF, Quyu3.GIF ... QuyuN.GIF.The line number of screening and the precision of images will be decided on the output device of post-production method and use;

(2) open simultaneously latent image file Yinxing.GIF and Screening Image file Quyu1.GIF, Quyu2.GIF, Quyu3.GIF ... QuyuN.GIF;

(3) set up a new image file, its picture specification (comprising size and resolution) must be consistent with Quyu1.GIF, and image model is the gray-scale map pattern;

(4) use the method for choosing, copy and paste entirely, successively latent image file Yinxing.GIF and Screening Image file Quyu1.GIF, Quyu2.GIF, Quyu3.GIF ... QuyuN.GIF duplicates on the different aspect that pastes new image file, and corresponding each layer of name is Yinxing, Quyu1, Quyu2, Quyu3 ... QuyuN;

(5) first kind of gradation zone of using the tone select tool to choose in the Yinxing layer is the constituency, and delete the corresponding zone of Quyu1 layer anti-choosing back, makes this zone become transparent region;

(6) successively use the level select tool to choose second in the Yinxing layer to N kind gradation zone and be the constituency, delete the corresponding zone of Quyu2 to QuyuN layer anti-choosing back, makes this zone become transparent region respectively;

(7) deletion Yinxing layer merges each remaining layer, and latent image just is hidden in the stealthy zone.Name saves as Quyu-Yinxing.GIF.

(8) with the form of picture file original color code passage that Quyu-Yinxing.GIF pastes back stealthy regional document Quyu.GIF, again the Quyu.GIF file is pasted back surface image file Biaomian. ^*Stealthy zone in.So far, the complete surperficial space of a whole page that has latent image can be accused to make and be finished.

5, the post-production of surface image:

According to the actual needs of all trades and professions, can carry out different post-production and making to the surface image that contains latent image.

6, the check of latent image:

(1) with general grating check.When discriminating person presses close to the stealthy zone that prompting is printed on latent image in the same way to clear plastic embossing grating or transparent plastic film plating grating, just can clearly see the latent image that certain gradation is arranged.

(2) with the stealthy grating check of thermal change.When discriminating person heats the stealthy zone that is printed on the thermal change grating by prompting, just can clearly see stealthy thermal change grating and latent image, thereby discern the true and false of this printed matter exactly.

(3) with photosensitive stealthy grating check.Discriminating person places the image-region that is printed on photosensitive grating under the irradiation of ultraviolet light by prompting, just can clearly see stealthy photosensitive grating and invisible anti-counterfeit mark, thereby discern the true and false of these article exactly.

Implementing the beneficial effect that the present invention had is:

1, increased the anti-counterfeit capability of image widely.Latent image has fully used special screening technology, drawn the new method of site off-centring screening, what hidden is not the sign war or the simple embossing pattern of no level, but the image that enriches level is arranged, thereby the difficulty of reproduction of image is greatly improved.Therefore, can't forge this class latent image under the situation of the various concrete data of fake producer when not knowing to make.

2, increased the secret ability of image widely.Since the precision tolerance very big, can't check this class latent image under the situation of the concrete data of the precision of images of proofer when not knowing to make.

3, increased the camouflage ability of image widely.Because the present invention has fully used the digital image treatment technology, the various indexs of the color optics of surface image and latent image remain consistent.Therefore the proofer to contain under the situation of latent image in not knowing surface image be to be difficult to find latent image.

Implement best mode of the present invention: make early stage and adopt full-computerized to handle, the later stage duplicates with job operation and all can go to finish by its conventional method, and the check grating preferably adopts plastics embossing grating.

Claims

1, a kind of image concealing technology.It comprises following basic step: 1. design and produce the surface image space of a whole page and selected hidden area as requested.2. design and make latent image.3. use image processing program, make the self-defined screening dot matrix gray level image of the polar that a plurality of dot matrix center is offset step by step.4. use self-defined screening technology, duplicate, paste, cut out in the zone etc., and image combining method is hidden in latent image in the stealthy zone of surface image.5. according to a conventional method the surface image that contains latent image is carried out other operations (as film output, various printing, photographic processing, printing, air brushing etc.) operation as required.6. observe the check latent image to reach various different needs with various dissimilar check gratings and supplementary instrument.

2, by the prepared latent image of above-mentioned image concealing technology.It is characterized in that: 1. observed what obtain is the surface image of camouflage to surface image by the organs of vision or general visual pattern optical viewer.2. latent image is hidden in the surface image (comprising image, color lump, body surface).3. latent image can reduce by the grating that is complementary with it and display.4. latent image is the hidden area that is made in surface image by the method for polar and skew dislocation screening.5. the dot matrix shape of reproducing latent image is polar.