CN1932876B - Method for burying into information on script of file print - Google Patents
Method for burying into information on script of file print Download PDFInfo
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- CN1932876B CN1932876B CN2006100161121A CN200610016112A CN1932876B CN 1932876 B CN1932876 B CN 1932876B CN 2006100161121 A CN2006100161121 A CN 2006100161121A CN 200610016112 A CN200610016112 A CN 200610016112A CN 1932876 B CN1932876 B CN 1932876B
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Abstract
The equipment embedding message in printed words using shielding coding relates to message embedding part and message identified part. The front part relates to embedding message dispose module, document dispose module, shielding coding embedding module and print output module. The latter part relates to scan input module, shielding coding identify module, data display module. The two parts make into the information recording equipment on the print words. It mainly uses to the pursuit of the lost paper and the attempt of paper document. When print the common paper, embed the printer, print time and message of print machine to the print words. Once the message is lost, it can help related department to find out the trench of lost paper and can be the gist of paper authenticity.
Description
Technical field
The present invention relates to a kind of on the literal of print media with the form of encoding of graphs record and identification computer information processing device, i.e. half-tone screen code file trace device.
Background technology
Along with the development and application of new material new technology, the carrier as the data message record develops into magnetic, light medium and storer etc. by initial paper medium carrier.But paper still has the effect that can not be substituted as information carrier.After " with no paper motion " promoted more than ten years, its use amount did not only reduce, and keeps 10% annual growth on the contrary always, and the beating of annual millions of printer sales volume and up to ten million/the duplicating machine recoverable amount is exactly this true evidence.The primitiveness of paper document, real diagnosis, intuitive, as characteristics such as the effect of law voucher financial assets voucher and security, permanance, numerous, these all are that e-file institute can't be substituted.A large amount of at present important confidential information and vital document etc. all are as memory carrier with the paper medium.But along with ultrafast personal computer, high-resolution laser are beaten/invention and the commercial applications of duplicating machine, scanner and charge-coupled image sensor; Quilt such as classified papers, certificate documents is arbitrarily illegally printed, duplicates, is spread or the like; Cause a large amount of important informations of individual, enterprise and country to run off, the politics and the economic order of society are on the hazard.According to parties concerned's statistics, cause the annual direct economic loss of the whole society up to 9,000 hundred million dollars thus, become the world's second largest public hazards that are only second to Drug-related crimes.For this reason, each developed country has begun legislation and has studied various countermeasures, how to solve paper medium information safety problem and is called as one of international forward position research topic that 21st century paid close attention to most, also becomes global problem simultaneously.
In the world, digital watermark technology (digital watermarking) is a focus of multi-media information security research field, also is the important branch in Investigation of Information Hiding Technology field, has obtained greatly paying attention in industry member and academia.But the overwhelming majority is anti-the duplicating or anti-tamper etc. safety problem for solving e-file; The information that seldom is used for the paper medium is imbedded; Particularly imbed quantity of information seldom in this single literal of file; And robustness is low, can not be used for the false proof and trace authentication of paper medium file and authentication etc.
The 2D bar code technology that adopts at present is on the basis of bar code, to generate; Therefore be difficult to jump out the limitation of bar code; The motion of at first all two-dimensional bar codes is still adopted black region is represented message code " 1 ", and white portion is represented message code " 0 ".Two-dimensional bar code equally must occur separately with bar code simultaneously, occupies certain space, and naked eyes are very easily found, and are easy to be replicated poor stability.Moreover the correct deciphering that paper pollutes two-dimensional bar code is fatal problem.
In the research of Printer Information security fields; The company of Fuji-Xerox of Japan comes the date printed of recording user document and the sequence number information of time and printer through the yellow dot matrix code of on the typescripts background, printing one millimeter of some diameter less than; This technology can only be defined in color printer, is not suitable for common black-and-white printer.And should technology not relate to the screen technology.
To above-mentioned printer, duplicating machine, the existing problem of all-in-one, a kind of novel device with document printing trace function of most of common black-and-white printer that can be applicable to becomes the trend of document security of future generation.
Imbedding up-to-date motion to the document literal information of carrying out is that disclosed by name " information is imbedded the patent of the program of detecting and programmed recording medium [spy opens 2005-341493] for information flush mounting; information detection device; information is imbedded checkout system; information is imbedded method, information method for detecting by Japan famous printer manufacturer.This method is added certain black pixel point through each row or the row at character image, makes its number become the odd or the even-multiple of a constant, is " 1 " or " 0 " according to odd or even-multiple decision.This method can solve the problem that the text printout quality reduces after the information of imbedding.But the quantity of information of imbedding is considerably less, and if file and picture can cause the very fatal problem of difficulty of identification when occur.
Imbedding another up-to-date motion to the document literal information of carrying out is the patent by the famous printer of Japanese another one manufacturer disclosed " image processing apparatus and method thereof " [spy opens 2006-74166] by name.This method is in the point of crossing of literal, T word point, and the angle, end points goes out through graph thinning to handle, again with the point of crossing of graph thinning, T word point, the angle, end points is the center, and " 1 " is stain, and " 0 " is imbedded for the white point information of carrying out.This method does not have to consider in very thin stroke, can occur the stroke broken string when imbedding information with this method, influences the problem of printing quality.
Summary of the invention
First purpose of the present invention is to imbed to the document printing literal information of carrying out used in everyday, particularly imbeds to the thinner document printing literal information of carrying out as having only two or three pixels of stroke.
Second purpose of the present invention is that solution information is imbedded the problem that back text printout quality reduces.
The 3rd purpose of the present invention is the method that can in literal, imbed bulk information of on the basis that addresses the above problem, seeking.
For realizing that above-mentioned purpose the present invention has adopted following technical scheme:
A kind of method of utilizing half-tone screen code in printing word, to imbed information is characterized in that partly forming by imbedding information processing part, document process part, screen coding embedded part, printout, and concrete steps are:
(1) imbeds information processing and partly read the time in the computing machine; Device code in the printer and comprise CR; The fingerprint recognition machine is at the code of interior represented operator characteristic; And will imbed comprise duplicating and forbid code that prevent to distort code, secret writing information is at interior at least a computerized information; The aforementioned calculation machine information is transformed into has, human eye has only the change in shape of several minimum print points with the point in the interior tiny area to size, point no change arranged; The number change of point; The change in location of point, the gray-value variation of point, the variation of the concentrated dispersion of point; The direction of point changes, the half-tone screen code that at least a parallax characteristic that the change in color of the variation of the frequency distribution of point or point is difficult for recognizing is constituted;
(2) text that document process part will printout is transformed into view data;
(3) half-tone screen code of screen coding embedded part after with above-mentioned conversion is embedded in the above-mentioned literal that is transformed into view data according to the rule of not destroying the literal edge, all is embedded in the entire document up to the aforementioned calculation machine information;
(4) the printout part will be imbedded the document printout of the view data form of information.
A kind of recognition methods that utilizes half-tone screen code in printing word, to imbed information is characterized in that by the importation, the half-tone screen code identification division, and data display unit is formed, and concrete steps are:
(1) the importation printing paper media document file that will imbed information reads into view data;
(2) the half-tone screen code identification division is with the half-tone screen code in each literal in the document of view data form; According to human eye size is had only the change in shape of several minimum print points with the point in the interior tiny area, point no change, the number change of point arranged; The change in location of point; The gray-value variation of point, the variation of the concentrated dispersion of point, the direction of point changes; The half-tone screen code information that the change in color of variation or the point of the frequency distribution of point is difficult for the rule of the half-tone screen code that at least a parallax characteristic of identification constituted and does not destroy the literal edge is imbedded rule and is discerned to half-tone screen code, and is transformed into computer code;
(3) data display unit demonstrates aforementioned calculation machine code value.
The invention has the beneficial effects as follows: adopt this embodiment in the stroke of the document literal of two or three pixels only, to imbed bulk information, and imbed that the quality of text printout can not reduce after the information.Compare the advantage of saving ink powder with the method for imbedding with the background information of carrying out.When can realize the normal printing document files, in the literal of printed text, imbed trace information, for example: the information of printing person's information, time-write interval, printer etc.In case classified papers information runs off, reveals, can trace file loss source through identification.Or become the foundation that the true or false of paper medium file is judged.The information human eye of imbedding is difficult for finding that the normal reading that does not influence file uses.This invention can thoroughly solve illegal printing, the duplicating of classified papers, and the problem that certificate documents is distorted etc. prevents the loss of classified papers.Has certain good effect to stabilizing society.
Description of drawings
Fig. 1 is that information of the present invention is imbedded flow process connection side block diagram.
Fig. 2 is an information Recognition flow process connection side block diagram of the present invention.
Fig. 3 is the various forms of the half-tone screen code that the information of carrying out is imbedded on literal among the present invention.
Fig. 4 is if the synoptic diagram that on the stroke of literal, has small broken string human eye to distinguish easily.
Fig. 5 utilizes that the half-tone screen code of various human eye parallax characteristics can represent 1, the synoptic diagram of 0 two kind of information state.
Fig. 6 be the half-tone screen code site by maximum similar degree between code at the arrangement synoptic diagram below 1/2.
Fig. 7 utilizes the site of various human eye parallax characteristics can constitute maximum similar degree at the half-tone screen code synoptic diagram below 1/2.
Fig. 8 be among the present invention on literal the information of carrying out imbed the information coding form synoptic diagram that is adopted.
Fig. 9 imbeds the embodiment 1 of the of the present invention effect of literal after scanning after the information.
Figure 10 imbeds the embodiment 2 of the of the present invention effect of literal after scanning after the information.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, to according to embodiment provided by the invention, structure, details are as follows for characteristic:
The implication of half-tone screen code is: at least a form in image, literal, mark, the background form is printed on the recording medium; Its printing content in the media is in interior different sites form by the physical characteristic that comprises geometry; Replace the screen site that forms by its given queueing discipline, and this method has constituted the half-tone screen code that the print content information of carrying out is imbedded.Its site form can be different from the site form that geometric characteristic was constituted by more than one, as: the shape of site, size, position and direction; The site form also can be different from the site form that physical characteristic was constituted by more than one, as: with the site of the site of different modulation modes, different spectral characteristics, the site of different frequency characteristic, the site of different optical characteristic and the site of different magnetic properties.
Can be on the literal of printed article the device of recorded information.This invention is mainly used in the trace that classified papers run off.When ordinary file is printed, the information of printing person, time-write interval, printer is embedded in the literal of printing, be equivalent to give a unique identity ID to each typescripts.In case fileinfo leaks, can trace printing person and document flow lost territory point, time etc. through discerning hiding screen information.Simultaneously can be used to control printer, duplicating machine use, prevent the loss of confidential information.Also can be used for comprising the government affairs file, commercial document and financial statement are in the authentication of the whether authenticity of interior various printing bills.
The half-tone screen code various forms of the tool of human eye parallax characteristic that Fig. 3 is the information of carrying out is imbedded on literal among the present invention application.A is that a kind of half-tone screen code information of using human eye parallax characteristic that the middle all printing points of (size has only several minimum print points) removal strokes of characters are also mended into the sealing envelope on the edge of in tiny area is imbedded form.B is that a kind of half-tone screen code information of using human eye parallax characteristic that (size has only several minimum print points) imbedded other gray-scale value point at the strokes of characters center section under the situation at the edge that does not destroy literal in tiny area is imbedded form.C is that (size has only several minimum print points) imbedded one at the strokes of characters center section and do not had a kind of half-tone screen code information of using human eye parallax characteristic of gray-scale value point to imbed form under the situation at the edge that does not destroy literal in tiny area.D is that a kind of application human eye parallax characteristic half-tone screen code information that (size has only several minimum print points) imbedded other color dot at the strokes of characters center section under the situation at the edge that does not destroy literal in tiny area is imbedded form.
As shown in Figure 4, if on the stroke of literal, there is small broken string human eye to distinguish easily, this is another kind of human eye parallax characteristic.In addition, when receiving small destruction human eye, the edge of literal also distinguishes easily.
The present invention has utilized above-mentioned human eye parallax characteristic, and the information of carrying out is imbedded under the situation at the edge that does not destroy literal as far as possible.Under the situation of three minimum print points, can adopt the form that the sealing envelope is mended at the literal edge that is shown in when strokes of characters is very carefully general, avoid the literal broken string as far as possible like Fig. 3 (a).Make strokes of characters small distortion occur though mend into the form of sealing envelope at the literal edge, owing to utilized human eye, can make result after information is imbedded not destroy the quality of text printout the human eye parallax characteristic that small distortion is not easy to distinguish.
Fig. 5 is when the information of carrying out is imbedded on literal among the present invention, utilize various human eye parallax characteristics the half-tone screen code site the dot matrix distribution characteristics represent 1, the form of 0 two kind of information state.(a, b) is the expression of two kinds of information states of the dot matrix distribution formation that the middle all printing points of removal strokes of characters are also mended into sealing envelope form screen site on the edge of in tiny area.(c, d) is the distribute expression of two kinds of information states constituting of a kind of dot matrix of using the half-tone screen code site of human eye parallax characteristic of in tiny area, under the situation at the edge that does not destroy literal, imbedding other gray-scale value point at the strokes of characters center section.(e, f) imbeds the distribute expression of two kinds of information states constituting of an a kind of dot matrix of using the half-tone screen code site of human eye parallax characteristic that does not have a gray-scale value point at the strokes of characters center section under the situation at the edge that does not destroy literal in tiny area.(g, h) is the distribute expression of two kinds of information states constituting of a kind of dot matrix of using human eye parallax characteristic half-tone screen code site of in tiny area, under the situation at the edge that does not destroy literal, imbedding other color dot at the strokes of characters center section.
For following description, we guide goes into the minimized notion of maximum similar degree between the screen code, and the implication of similar degree is exactly the similarity degree between code between so-called code, and the big more representative of its value is similar more, and resolution is low more, discerns more difficult; Otherwise similar degree is more little between code, and resolution is high more, and it is easy more to discern.
In half-tone screen code, establish S
kFor message code, n are that code is long, when m is the quantity of code, maximum similar degree A between said half-tone screen code
MaxBe to be expressed from the next:
[formula 1]
d
min＝mind(S
k，S
l)
[formula 2]
In the formula: d (S
k, S
l) be code S
kWith S
lBetween both number of different code position between code of distance, k, l=0,1,2 ... m-1.
Fig. 6 be the present invention will use human eye parallax characteristic the half-tone screen code site by maximum similar degree between code at a kind of rank results example below 1/2.The number of different numerical position is greater than the half the quantity that equals code length between mutual immediate any one group of code in these 16 codes.Therefore code length of this group code is 8, and the number of different numerical position is greater than and equals 4 between any one group of code.Therefore, the maximum similar degree between the code of the half-tone screen code that this embodiment adopts has higher recognition resolution and antijamming capability below 1/2 in the identification of half-tone screen code.
Fig. 7 is that the G4 code with Fig. 6 is an example, as among Fig. 5 four kinds utilize the site of human eye parallax characteristic can constitute the synoptic diagram of maximum similar degree at the half-tone screen code below 1/2.
(a, b) is the synoptic diagram of the maximum similar degree of the dot matrix distribution formation that the middle all printing points of removal strokes of characters are also mended into sealing envelope form screen site on the edge of in tiny area at the half-tone screen code below 1/2 among Fig. 7.(c, d) is a kind of dot matrix of using the screen site of human eye parallax characteristic of in tiny area, under the situation at the edge that does not destroy literal, imbedding other gray-scale value point at the strokes of characters center section maximum similar degree that constitutes synoptic diagram at the half-tone screen code below 1/2 that distributes.(e, f) imbeds an a kind of dot matrix of using the screen site of human eye parallax characteristic that the does not have a gray-scale value point maximum similar degree that the constitutes synoptic diagram at the half-tone screen code below 1/2 that distributes at the strokes of characters center section under the situation at the edge that does not destroy literal in tiny area.(g, h) is a kind of dot matrix of using human eye parallax characteristic screen site of in tiny area, under the situation at the edge that does not destroy literal, imbedding other color dot at the strokes of characters center section maximum similar degree that constitutes synoptic diagram at the half-tone screen code below 1/2 that distributes.
Fig. 8 be among the present invention on literal the information of carrying out imbed the information coding form synoptic diagram that is adopted.
In Fig. 8,101 expression message codes " 1 ", 102 expression message codes " 0 ".201 expression location information code, 202 expression positional information check code, 203 expression data message codes, 1,203 expression data message code 2.
In the present invention, we adopt the one dimension screen code form of variable-length, and two kinds of information point description forms are arranged in this code form structure, 101 expression message codes " 1 " and 102 expression message codes " 0 ".Information point is to utilize human eye parallax characteristic screen to realize imbedding of information through the dot matrix distribution of adjusting the screen site of this position in a zonule; Can adjust the gray scale of this position through this method; Thereby realize imbedding of information, this area size has been considered resolution characteristic different of human eye and scanner simultaneously, selects best adjustment region big or small; Make the information point of imbedding be difficult for by human eye, the information of accomplishing is imbedded optimization.First half is used for record position information in message code; Latter half is used to write down two data codes; Constitute a complete message code by these two parts, code occupied spatial extent in document printing is a variable-length simultaneously, and is flexible automatically according to print content.
Fig. 9 and Figure 10 represent to adopt method of the present invention, the embodiment 1 and the embodiment 2 of the effect after in the document literal, imbedding information.From Fig. 9 and Figure 10, can find out, in the document literal, imbed information after, the quality of text printout does not change.
Below be example narration the present invention imbeds information in the document literal idiographic flow with Fig. 1;
The information inlet part of in the document literal, imbedding in the massaging device constitutes by imbedding message processing module, document process module, screen coding embedded module, printout module four parts, and it is following that its information is specifically imbedded flowchart text:
When printer began to print, at first step S1 trace information acquisition unit just automatically read the local printing time, the device code in the printer and comprise CR; The fingerprint recognition machine is at the code of interior represented operator characteristic; And will imbed comprise duplicating and forbid code that prevent to distort code, secret writing information is at interior computer code; Then with the information stores that obtains in internal memory, get into step S2 information coding encrypting.
In step S2, automatically from internal memory, take out the trace information of storage; Convert the above-mentioned data message code of obtaining to 0～9 according to one-to-one relationship; The half-tone screen code of A～F; Then the message code of conversion is encrypted the back from newly being stored in the internal memory, thereby realize data-switching, get into step S3.
At first from print memory, obtain image data information among the step S3.Change step S4 after the completion over to.
The view data of print file in the first prescan internal memory among the step S4 is found out also and is satisfied the particular location of imbedding a complete information condition in the shorthand, gets into step S5 then.
In step S5, from internal memory, read conversion after half-tone screen code trace information, according to position and information one-to-one principle; Directly adjust the network point distribution of correspondence position in the literal; Utilize the half-tone screen code of human eye parallax characteristic, change the gray distribution features of the site of this position, will deposit internal memory in according to the adjusted new images result of the information of imbedding then; Up to imbedding a complete information, jump to step S6 then.
In image, imbed an end tag information among the step S6, jump to step S4 then, restart a new complete information and imbed.All information are imbedded end, get into step S8, and information is imbedded success.
Among the step S9, start the printout engine, with the realization in the above-mentioned internal memory image of half-tone screen code deliver to output printer output, so far just accomplished and in the literal of document printing, imbedded trace information.
Below be example narration the present invention imbeds information in the document literal idiographic flow with Fig. 2;
The half-tone screen code reading device is made up of scanning load module, half-tone screen code identification module, data disaply moudle three parts, and concrete identification process is as shown in Figure 2.
At first get into step S1 and start autoscan engine, scan image.Get into step S2 after the been scanned.
Automatically the data that scan are become the form that the identification processing needs among the step S2, be stored in the internal memory, get into step S3.
Main image processing algorithm through us improves the signal to noise ratio (S/N ratio) of scan image quality in step S3, and the image data information of handling well is stored in the internal memory.Get into step S4.
In step S4, correction calculation is carried out in the pattern distortion that causes owing to printout, scanner scanning.Proofread and correct the back and get into step S5.
Among the step S5, at first locate the particular location of screen information point, extract screen information through recognizer then, with the screen information stores after extracting in internal memory.
Among the step S6 screen information of extracting is carried out verification, the error correction of data.In this module, used similar degree less than 1/2 coding self-correction function.After finishing last identifying information is stored in the internal memory.
Step S7 reads canned data in the internal memory, and the one-to-one relationship according to half-tone screen code and computer data coding converts above-mentioned screen to computer data, shows then.So far information Recognition is accomplished.
Advantageous effect of the present invention is:
1. can under the condition of the original appearance that does not change document files, imbed information.Solved owing to the problem of imbedding the waste ink powder with the background information of carrying out.
2. after in the document literal, imbedding information, printing quality does not obviously change.
3. because information is to be embedded in literally, can be used for literal is distorted the automatic identification in place.
Succeeding in developing of this device is for the classified papers information management of each association areas such as national defense construction, military confidential, scientific research exploration, secret of the trade and law, fileinfo runs off that more application prospects is arranged.
Claims (2)
1. method of utilizing half-tone screen code in printing word, to imbed information is characterized in that partly forming by imbedding information processing part, document process part, screen coding embedded part, printout, and concrete steps are:
(1) imbed information processing partly read time, the device code in the printer in the computing machine and comprise CR, fingerprint recognition machine represented operator characteristic code and duplicate comprising of will imbedding and forbid code, prevent to distort at least a computerized information of code, secret writing information; The aforementioned calculation machine information is transformed into has, human eye has only the change in shape of several minimum print points with the point in the interior tiny area to size, point no change arranged; The number change of point; The change in location of point, the gray-value variation of point, the variation of the concentrated dispersion of point; The direction of point changes, the half-tone screen code that at least a parallax characteristic that the change in color of the variation of the frequency distribution of point or point is difficult for recognizing is constituted;
(2) text that document process part will printout is transformed into view data;
(3) half-tone screen code of screen coding embedded part after with above-mentioned conversion is embedded in the above-mentioned literal that is transformed into view data according to the rule of not destroying the literal edge, all is embedded in the entire document up to the aforementioned calculation machine information;
(4) the printout part will be imbedded the document printout of the view data form of information.
2. a recognition methods that utilizes half-tone screen code in printing word, to imbed information is characterized in that by the importation, the half-tone screen code identification division, and data display unit is formed, and concrete steps are:
(1) the importation printing paper media document file that will imbed information reads into view data;
(2) the half-tone screen code identification division is with the half-tone screen code in each literal in the document of view data form; According to human eye size is had only the change in shape of several minimum print points with the point in the interior tiny area, point no change, the number change of point arranged; The change in location of point; The gray-value variation of point, the variation of the concentrated dispersion of point, the direction of point changes; The half-tone screen code information that the change in color of variation or the point of the frequency distribution of point is difficult for the rule of the half-tone screen code that at least a parallax characteristic of identification constituted and does not destroy the literal edge is imbedded rule half-tone screen code is discerned, and is transformed into computer code;
(3) data display unit demonstrates aforementioned calculation machine code value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2006100161121A CN1932876B (en) | 2006-10-09 | 2006-10-09 | Method for burying into information on script of file print |
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| CN2006100161121A CN1932876B (en) | 2006-10-09 | 2006-10-09 | Method for burying into information on script of file print |
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| CN1932876A CN1932876A (en) | 2007-03-21 |
| CN1932876B true CN1932876B (en) | 2012-01-11 |
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| CN2006100161121A Expired - Fee Related CN1932876B (en) | 2006-10-09 | 2006-10-09 | Method for burying into information on script of file print |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101127089B (en) * | 2007-07-02 | 2013-05-08 | 天津市阿波罗信息技术有限公司 | Implement method for embedding large amount of information on printing media |
| CN101149779B (en) * | 2007-11-06 | 2013-06-12 | 天津市阿波罗信息技术有限公司 | Method for embedding government application file content in paper medium |
| CN102103614B (en) * | 2009-12-18 | 2013-08-14 | 北大方正集团有限公司 | Method and system for constructing ink-saved word stock based on compression mode |
| CN104636642B (en) * | 2015-02-10 | 2017-10-31 | 雨果·巴勃罗·阿尔伯特·加西亚-科特 | File protection and verification method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5467169A (en) * | 1993-07-01 | 1995-11-14 | Minolta Camera Kabushiki Kaisha | Image forming apparatus which can prevent copying during a predetermined period and allow copying at other times |
| CN1424690A (en) * | 2003-01-20 | 2003-06-18 | 天津市阿波罗信息技术有限公司 | Network screen encoded anti-fakery method |
| US20040013284A1 (en) * | 2002-07-16 | 2004-01-22 | Yu Hong Heather | Methods for digital watermarking of images and images produced thereby |
| CN1598873A (en) * | 2004-08-17 | 2005-03-23 | 顾泽苍 | Network screen coding control method capable of recording mass data on paper |
| CN1828636A (en) * | 2006-03-31 | 2006-09-06 | 天津市阿波罗信息技术有限公司 | Screen coding embedded information communication device |
-
2006
- 2006-10-09 CN CN2006100161121A patent/CN1932876B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5467169A (en) * | 1993-07-01 | 1995-11-14 | Minolta Camera Kabushiki Kaisha | Image forming apparatus which can prevent copying during a predetermined period and allow copying at other times |
| US20040013284A1 (en) * | 2002-07-16 | 2004-01-22 | Yu Hong Heather | Methods for digital watermarking of images and images produced thereby |
| CN1424690A (en) * | 2003-01-20 | 2003-06-18 | 天津市阿波罗信息技术有限公司 | Network screen encoded anti-fakery method |
| CN1598873A (en) * | 2004-08-17 | 2005-03-23 | 顾泽苍 | Network screen coding control method capable of recording mass data on paper |
| CN1828636A (en) * | 2006-03-31 | 2006-09-06 | 天津市阿波罗信息技术有限公司 | Screen coding embedded information communication device |
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| Publication number | Publication date |
|---|---|
| CN1932876A (en) | 2007-03-21 |
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