CN102457652A - Anti-counterfeiting detection method and anti-counterfeiting maintenance system for document - Google Patents
Anti-counterfeiting detection method and anti-counterfeiting maintenance system for document Download PDFInfo
- Publication number
- CN102457652A CN102457652A CN2010105099814A CN201010509981A CN102457652A CN 102457652 A CN102457652 A CN 102457652A CN 2010105099814 A CN2010105099814 A CN 2010105099814A CN 201010509981 A CN201010509981 A CN 201010509981A CN 102457652 A CN102457652 A CN 102457652A
- Authority
- CN
- China
- Prior art keywords
- false proof
- document
- picture
- proof picture
- false
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Editing Of Facsimile Originals (AREA)
- Image Processing (AREA)
Abstract
The invention relates to an anti-counterfeiting detection method of a document, which comprises the following steps: adopting an optical watermarking technology to generate an anti-counterfeiting picture according to the set anti-counterfeiting information content, wherein the anti-counterfeiting picture hides partial pixel information according to a set algorithm; adding the anti-counterfeiting picture into a document page, and printing and outputting; and when the authenticity is identified, scanning the anti-counterfeiting picture in the document to generate an electronic picture, extracting hidden pixel information from the electronic picture, comparing the hidden pixel information with the reserved picture source hidden pixel information, and if the comparison is consistent, determining that the document is true, otherwise, determining that the document is false. The invention also provides an anti-counterfeiting detection system for the document. The invention has better detection accuracy and can ensure the authenticity and uniqueness of the document.
Description
Technical field
The present invention relates to the false proof field of document, particularly a kind of false-proof detection method of document and anti-counterfeit detecting system.
Background technology
The development of Along with computer technology, network and mechanics of communication; Driven popularizing of the popularizing of e-commerce and e-government, office automation application software; The use amount of printer, photocopier continues to increase; The user increases considerably through the amount of information of office automation software, network and print out equipment output, has brought new challenge for thus government offices, enterprises and institutions and user's information security strick precaution and information anti-fake.How can effectively guarantee the authenticity of output information, integrality and uniqueness prevent illegal copies, forge and the information of distorting becomes new important topic.
The safety of printout information is main relevant with four aspects with anti-pseudo problem: PRN device, printing paper, pad-ink and print What.Through adopting special-purpose PRN device, anti-forge paper and anti-forgery ink (photochromatic printing ink, fluorescent ink) though etc. the method fail safe that can improve output information; Raise the technical threshold and the cost of forgery; But increased user's false proof cost simultaneously greatly, and above-mentioned these methods do not have versatility yet.Therefore, only be based upon the anti-counterfeiting technology and the scalable market demand of solution ability that can adopt general PRN device, paper and printing ink output information.
At present, comparatively commonly used is that the document anti-counterfeiting technology is to utilize digital watermark technology, and digital watermarking is a kind of covert indicia that loads in the numerical data.During document printing, covert indicia is loaded in the document.When needing to detect the document true and false, through scanning the document, the mark of correlation of covert indicia in the document and calculator memory storage is compared, unanimity confirms that then the document is true, otherwise confirms that the document is false.
It is false proof to utilize digital watermarking to carry out document, though than directly with the naked eye the identification document true and false higher reliability is arranged, still; If the document by illegal copies with duplicate, still have identical covert indicia on illegal copies and the document that duplicates, after the scanning; Computer is easy to wrong thinking, and illegal copies and the document that duplicates are true document; Influence false proof reliability,, just might bring heavy losses to the user imposing a condition down.
Summary of the invention
The object of the invention provides a kind of false-proof detection method of document, and this method has the quite good detecting accuracy, can guarantee the authenticity and the uniqueness of document.
The false-proof detection method of a kind of document of the present invention may further comprise the steps: the anti-counterfeiting information content according to setting generates false proof picture, and this false proof picture is pressed set algorithm hidden parts Pixel Information; Adopt the optical watermark technology that false proof picture is added in the document file page, print output; When discerning the false from the genuine, false proof picture generates electronic pictures in the scanned document, in electronic pictures, extracts and hides Pixel Information, hides Pixel Information with the figure source of retaining and compares, and the contrast unanimity thinks that then the document is true, otherwise thinks that the document is false.
Preferably, generate false proof picture according to the anti-counterfeiting information content of setting, this false proof picture is specially by set algorithm hidden parts Pixel Information: on same original image, generate many group different space frequency structures, the logic diagram lamella of different directions; Many groups anti-counterfeiting information is sampled respectively and added random noise, hide pixel by set algorithm and generate a plurality of sampling pictures; Be that template is processed into the logic diagram lamella with each sampling picture respectively again, each logic diagram lamella is carried out phase shift along a certain direction, make up all logic diagram lamellas and generate false proof picture.
Preferably, during printing, print output by the resolution of setting; When discerning the false from the genuine, by false proof picture in the resolution scan document of setting.
Preferably, the resolution of said setting is more than or equal to 600DPI.
The present invention also provides a kind of anti-counterfeit detecting system of document, and this system has the quite good detecting accuracy, can guarantee the authenticity and the uniqueness of document.
The anti-counterfeit detecting system of a kind of document of the present invention comprises false proof picture production unit, false proof picture adding device and false proof picture discriminating unit:
Said false proof picture production unit is used for generating false proof picture according to the anti-counterfeiting information content of setting, and this false proof picture is pressed set algorithm hidden parts Pixel Information;
Said false proof picture adding device is used for adopting the optical watermark technology to add false proof picture to document file page, prints output;
Said false proof picture discriminating unit, when being used to discern the false from the genuine, false proof picture generates electronic pictures in the scanned document; In electronic pictures, extract and hide Pixel Information; Hide Pixel Information with the figure source of retaining and compare, the contrast unanimity thinks that then the document is true, otherwise thinks that the document is false.
Preferably, false proof picture production unit comprises logic diagram lamella subelement, sample graph sheet subelement, logic diagram lamella subelement and false proof picture subelement:
Said logic diagram lamella subelement is used on same original image, generating many group different space frequency structures, the logic diagram lamella of different directions;
Said sample graph sheet subelement is used for many groups anti-counterfeiting information is sampled respectively and added random noise, hides pixel by set algorithm and generates a plurality of sampling pictures;
Said logic diagram lamella subelement, being used for is that template is processed into the logic diagram lamella with each sampling picture respectively again;
Said false proof figure slice, thin piece list is used for each logic diagram lamella is carried out phase shift along a certain direction, makes up all logic diagram lamellas and generates false proof picture.
Compared with prior art, the present invention has the following advantages:
The present invention adopts optical watermark technology to generate false proof picture, and false proof picture is added in the document, adopts false proof picture that the optical watermark technology adds being duplicated and during copy, and partial pixel will disappear or smudgy in the false proof picture.Like this; In the document from copy in false proof picture and the former document pixel in the false proof picture inconsistent; When differentiating, it is inconsistent that the relevant information of in the false proof picture of document from copy, extracting and the figure source of retention hide Pixel Information, can accurately pick out document from copy and former document again.
The present invention is when printing picture; At the different logical picture layer of false proof picture by different algorithms hidden parts Pixel Information, like this, even the counterfeiter gets access to partial information according to the false proof picture of former document; Choosing equipment adopts the mode identical with the present invention again; Utilize the optical watermark technology to add imitated false proof picture on document printout, also will be because of false proof picture of the present invention use special algorithm hidden parts Pixel Information, make that false proof picture and the false proof picture Pixel Information in the former document in the imitated document is inconsistent and identified the true and false; During discriminating; The figure source of in the false proof picture of imitated document, extracting related pixel information and retention hides Pixel Information compares, and the comparison pixels information result is inconsistent, can accurately pick out document from copy and former document.
Description of drawings
Fig. 1 is the false-proof detection method one embodiment flow chart of document of the present invention;
Fig. 2 is the anti-counterfeit detecting system one embodiment sketch map of document of the present invention.
Embodiment
For make above-mentioned purpose of the present invention, feature and advantage can be more obviously understandable, below in conjunction with accompanying drawing and embodiment the present invention done further detailed explanation.
The present invention is when document printing; False proof picture is loaded on the document, and this false proof picture includes the element information of setting, and the document is as being copied or duplicating; Through the element information in this false proof picture accurately identification document from copy and former document, guarantee the authenticity and the uniqueness of document.
Referring to Fig. 1, false-proof detection method one embodiment of document of the present invention is shown, it is following to have step.
Step S101, the picture height, width, angle and the false proof personal information (like organization) that are provided with according to the user press set algorithm and are generated the figure source and hide Pixel Information, and retain, so that when the false proof picture of detection document, use.Random algorithm generates also difference of the hiding Pixel Information in figure source after the information different sample such as the picture height that the user is provided with, width, angle.
Step S102, according to document information or user's request, set anti-counterfeiting information content (comprising literal and figure), generate false proof picture, adopt the optical watermark technology that false proof picture is added in the document file page, and resolution (like the 600DPI) document printing of setting.The resolution of PRN device is more than or equal to 600DPI, like ink-jet printer, laser printer, plotter etc.
The generation of false proof picture is the optical characteristics according to microtrabeculae face lens or microballoon face lens, on same original image, generates many group different space frequency structures, the logic diagram lamella of different directions; Many groups anti-counterfeiting information (comprising literal and figure) is sampled respectively and added random noise; Hide pixel by set algorithm and generate a plurality of sampling pictures; Be that template is processed into the logic diagram lamella with each sampling picture respectively again; Again each logic diagram lamella is carried out suitable phase shift along a certain direction, make up all logic diagram lamellas and generate false proof picture.
When step S103, printing false-proof picture, can follow according to customer requirements and adopt the superposition mode to generate different anti-counterfeiting information, be applied to the Different Logic picture layer, each logic diagram lamella is all pressed special algorithm hidden parts Pixel Information.Such as, ground floor: adopt 45 degree that false proof content " golden lattice science and technology " is set, on this layer, have the partial pixel can be by the translation respective; The second layer: adopt 135 degree that false proof content " goldgrid " is set, have the partial pixel can be by the translation respective on this layer equally, these translations can't find through naked eyes.
Step S104, when discerning the false from the genuine; False proof picture in the document is generated electronic pictures by setting resolution scanning, in this electronic pictures, extract relevant information, hide Pixel Information with the figure source of retaining and compare; Unanimity thinks that then the document is true, otherwise thinks that the document is false.
The present invention has maltilevel security and guarantees, with checking true and false document.One of which, the present invention adopts optical watermark technology to generate false proof picture, and false proof picture is added in the document, and the document that contains false proof picture is being duplicated and during copy, and partial pixel will disappear or smudgy in the false proof picture.Like this; In the document from copy in false proof picture and the former document pixel in the false proof picture inconsistent; When differentiating, it is inconsistent that the relevant information of in the false proof picture of document from copy, extracting and the figure source of retention hide Pixel Information, can accurately pick out document from copy and former document again.
They are two years old; The present invention when printing picture, the special algorithm hidden parts Pixel Information of pressing different parameters at the different logical picture layer of false proof picture, like this; Even the counterfeiter gets access to partial information according to the false proof picture of former document; Choosing equipment adopts the mode identical with the present invention again, utilizes the optical watermark technology to add imitated false proof picture on document printout, because of false proof picture hidden parts Pixel Information of the present invention; In the imitated document in false proof picture and the former document pixel in the false proof picture inconsistent; During discriminating, it is inconsistent that the relevant information of in the false proof picture of imitated document, extracting and the figure source of retention hide Pixel Information, still can accurately pick out document from copy and former document.
Its three, the present invention adopts the resolution of setting to print output, only under the scanning resolution situation consistent with printing resolution, the hiding Pixel Information ability in the figure source of the hiding pixel of false proof picture and retention is identical in the document.The pixel quantity of the false proof picture that different resolution prints is different, imitated person under the unclear prerequisite of setting resolution, the hiding pixel of the false proof picture of printing still different with former document in the hiding pixel of false proof picture, during discriminating, can accurately pick out.
The user is when identification the document; False proof decoding device is placed on the false proof picture region top of paper document; Adjust suitable angle and position, can clearly check the anti-counterfeiting information content of prior setting, anti-counterfeiting information disappearance or smudgy in the false proof picture of document from copy.False proof picture decoding device generally is to adopt high transparent optical material to make, and the key component of equipment simultaneously is the plane, and another side is a kind of microtrabeculae face or microballoon face of definite spatial frequency structure.
Based on the false-proof detection method of above-mentioned document, the present invention also provides a kind of anti-counterfeit detecting system of document.Referring to Fig. 2, this system comprises false proof picture production unit 21, false proof picture adding device 22 and false proof picture discriminating unit 23.
False proof picture production unit 21 generates false proof picture according to the anti-counterfeiting information content of setting, and this false proof picture is pressed set algorithm hidden parts Pixel Information;
False proof picture adding device 22 adopts the optical watermark technology to generate false proof picture, and false proof picture is added in the document file page, prints output;
When false proof picture discriminating unit 23 is discerned the false from the genuine; False proof picture generates electronic pictures in the scanned document, in electronic pictures, extracts and hides Pixel Information, hides Pixel Information with the figure source of retaining and compares; The contrast unanimity thinks that then the document is true, otherwise thinks that the document is false.
False proof picture production unit 21 comprises logic diagram lamella subelement 211, sample graph sheet subelement 212, logic diagram lamella subelement 213 and false proof picture subelement 214.
Logic diagram lamella subelement 211 generates many group different space frequency structures, the logic diagram lamella of different directions on same original image;
Sample graph sheet subelement is organized anti-counterfeiting information more and is sampled respectively and add random noise 212 pairs, hide pixel by set algorithm and generate a plurality of sampling pictures;
Logic diagram lamella subelement 213 is that template is processed into the logic diagram lamella with each sampling picture respectively again;
False proof figure slice, thin piece list 214 carries out phase shift with each logic diagram lamella along a certain direction, makes up all logic diagram lamellas and generates false proof picture.
The above is merely preferred implementation of the present invention, does not constitute the qualification to protection range of the present invention.Any any modification of within spirit of the present invention and principle, being done, be equal to replacement and improvement etc., all should be included within the claim protection range of the present invention.
Claims (6)
1. the false-proof detection method of a document is characterized in that, may further comprise the steps:
Employing optical watermark technology generates false proof picture according to the anti-counterfeiting information content of setting, and this false proof picture is pressed set algorithm hidden parts Pixel Information;
Add false proof picture to document file page, print output;
When discerning the false from the genuine, false proof picture generates electronic pictures in the scanned document, in electronic pictures, extracts and hides Pixel Information, hides Pixel Information with the figure source of retaining and compares, and the contrast unanimity thinks that then the document is true, otherwise thinks that the document is false.
2. detection method as claimed in claim 1 is characterized in that, generates false proof picture according to the anti-counterfeiting information content of setting, and this false proof picture is specially by set algorithm hidden parts Pixel Information:
On same original image, generate many group different space frequency structures, the logic diagram lamella of different directions; Many groups anti-counterfeiting information is sampled respectively and added random noise, hide pixel by set algorithm and generate a plurality of sampling pictures; Be that template is processed into the logic diagram lamella with each sampling picture respectively again, each logic diagram lamella is carried out phase shift along a certain direction, make up all logic diagram lamellas and generate false proof picture.
3. detection method as claimed in claim 1 is characterized in that, during printing, prints output by the resolution of setting; When discerning the false from the genuine, by false proof picture in the resolution scan document of setting.
4. detection method as claimed in claim 3 is characterized in that, the resolution of said setting is more than or equal to 600DPI.
5. the anti-counterfeit detecting system of a document is characterized in that, comprises false proof picture production unit, false proof picture adding device and false proof picture discriminating unit:
Said false proof picture production unit is used for the Application Optics digital watermark, generates false proof picture according to the anti-counterfeiting information content of setting, and this false proof picture is pressed set algorithm hidden parts Pixel Information;
Said false proof picture adding device adds false proof picture to document file page, prints output;
Said false proof picture discriminating unit, when being used to discern the false from the genuine, false proof picture generates electronic pictures in the scanned document; In electronic pictures, extract and hide Pixel Information; Hide Pixel Information with the figure source of retaining and compare, the contrast unanimity thinks that then the document is true, otherwise thinks that the document is false.
6. detection system as claimed in claim 5 is characterized in that, false proof picture production unit comprises logic diagram lamella subelement, sample graph sheet subelement, logic diagram lamella subelement and false proof picture subelement:
Said logic diagram lamella subelement is used on same original image, generating many group different space frequency structures, the logic diagram lamella of different directions;
Said sample graph sheet subelement is used for many groups anti-counterfeiting information is sampled respectively and added random noise, hides Pixel Information by set algorithm and generates a plurality of sampling pictures;
Said logic diagram lamella subelement, being used for is that template is processed into the logic diagram lamella with each sampling picture respectively again;
Said false proof figure slice, thin piece list is used for each logic diagram lamella is carried out phase shift along a certain direction, makes up all logic diagram lamellas and generates false proof picture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105099814A CN102457652A (en) | 2010-10-18 | 2010-10-18 | Anti-counterfeiting detection method and anti-counterfeiting maintenance system for document |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105099814A CN102457652A (en) | 2010-10-18 | 2010-10-18 | Anti-counterfeiting detection method and anti-counterfeiting maintenance system for document |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102457652A true CN102457652A (en) | 2012-05-16 |
Family
ID=46040270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105099814A Pending CN102457652A (en) | 2010-10-18 | 2010-10-18 | Anti-counterfeiting detection method and anti-counterfeiting maintenance system for document |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102457652A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065109A (en) * | 2012-12-12 | 2013-04-24 | 上海新世界旅游纪念品有限公司 | Anti-fake method and system based on calligraphy and painting micro-texture |
| CN104574464A (en) * | 2015-01-08 | 2015-04-29 | 北京东港安全印刷有限公司 | Random matrix moire fringe anti-fake pattern and manufacturing method thereof |
| CN105447812A (en) * | 2015-11-10 | 2016-03-30 | 南京大学 | 3D moving image displaying and information hiding method based on linear array |
| CN106503497A (en) * | 2016-10-21 | 2017-03-15 | 国网黑龙江省电力有限公司信息通信公司 | Divulgence prevention method and anti-module of divulging a secret based on noise |
| CN109684796A (en) * | 2018-10-31 | 2019-04-26 | 平安科技（深圳）有限公司 | A kind of document method for anti-counterfeit, device and readable storage medium storing program for executing based on digital watermarking |
| CN110276709A (en) * | 2019-06-18 | 2019-09-24 | 周晓明 | It is a kind of for the generation of protectiveness document, discrimination method and information management system |
| CN112464181A (en) * | 2020-12-10 | 2021-03-09 | 国机工业互联网研究院(河南)有限公司 | Method and system for preventing counterfeiting of electronic signature printed paper document |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1542672A (en) * | 2003-04-30 | 2004-11-03 | 四川大学 | Anti-counterfeiting multiple image hiding method for articles |
| CN1738235A (en) * | 2005-09-12 | 2006-02-22 | 西安交通大学 | Image anti-counterfeiting method based on chaotic characteristics |
| CN1790420A (en) * | 2005-12-01 | 2006-06-21 | 北京北大方正电子有限公司 | Method and apparatus for embedding and detecting digital watermark in text file |
| CN1904939A (en) * | 2005-07-25 | 2007-01-31 | 侯遵泽 | Certificate making and detecting method based on wavelet analysis |
| CN1991901A (en) * | 2005-12-31 | 2007-07-04 | 北京华旗数码影像技术研究院有限责任公司 | Method and device for embedding finger water-print information |
| US20100082478A1 (en) * | 2007-03-16 | 2010-04-01 | Koninklijke Philips Electronics N.V. | Apparatus & methods for digital content distribution |
| CN101702150A (en) * | 2009-12-02 | 2010-05-05 | 江西金格网络科技有限责任公司 | Method for protecting, verifying and repealing content of PDF document page |
-
2010
- 2010-10-18 CN CN2010105099814A patent/CN102457652A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1542672A (en) * | 2003-04-30 | 2004-11-03 | 四川大学 | Anti-counterfeiting multiple image hiding method for articles |
| CN1904939A (en) * | 2005-07-25 | 2007-01-31 | 侯遵泽 | Certificate making and detecting method based on wavelet analysis |
| CN1738235A (en) * | 2005-09-12 | 2006-02-22 | 西安交通大学 | Image anti-counterfeiting method based on chaotic characteristics |
| CN1790420A (en) * | 2005-12-01 | 2006-06-21 | 北京北大方正电子有限公司 | Method and apparatus for embedding and detecting digital watermark in text file |
| CN1991901A (en) * | 2005-12-31 | 2007-07-04 | 北京华旗数码影像技术研究院有限责任公司 | Method and device for embedding finger water-print information |
| US20100082478A1 (en) * | 2007-03-16 | 2010-04-01 | Koninklijke Philips Electronics N.V. | Apparatus & methods for digital content distribution |
| CN101702150A (en) * | 2009-12-02 | 2010-05-05 | 江西金格网络科技有限责任公司 | Method for protecting, verifying and repealing content of PDF document page |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065109A (en) * | 2012-12-12 | 2013-04-24 | 上海新世界旅游纪念品有限公司 | Anti-fake method and system based on calligraphy and painting micro-texture |
| CN103065109B (en) * | 2012-12-12 | 2016-06-15 | 上海新世界旅游纪念品有限公司 | Method for anti-counterfeit and system based on calligraphy and painting Micro texture |
| CN104574464A (en) * | 2015-01-08 | 2015-04-29 | 北京东港安全印刷有限公司 | Random matrix moire fringe anti-fake pattern and manufacturing method thereof |
| CN104574464B (en) * | 2015-01-08 | 2017-07-14 | 北京东港安全印刷有限公司 | A kind of false proof grain pattern of random matrix Moire fringe and preparation method thereof |
| CN105447812A (en) * | 2015-11-10 | 2016-03-30 | 南京大学 | 3D moving image displaying and information hiding method based on linear array |
| CN105447812B (en) * | 2015-11-10 | 2018-11-27 | 南京大学 | A kind of three-dimensional moving image based on line array is shown and information concealing method |
| CN106503497A (en) * | 2016-10-21 | 2017-03-15 | 国网黑龙江省电力有限公司信息通信公司 | Divulgence prevention method and anti-module of divulging a secret based on noise |
| CN106503497B (en) * | 2016-10-21 | 2019-06-21 | 国网黑龙江省电力有限公司信息通信公司 | Anti-leak method and anti-leak module based on noise |
| CN109684796A (en) * | 2018-10-31 | 2019-04-26 | 平安科技（深圳）有限公司 | A kind of document method for anti-counterfeit, device and readable storage medium storing program for executing based on digital watermarking |
| CN110276709A (en) * | 2019-06-18 | 2019-09-24 | 周晓明 | It is a kind of for the generation of protectiveness document, discrimination method and information management system |
| CN112464181A (en) * | 2020-12-10 | 2021-03-09 | 国机工业互联网研究院(河南)有限公司 | Method and system for preventing counterfeiting of electronic signature printed paper document |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5004747B2 (en) | Security mark formation system, security mark formation method, security mark detection method, and security mark detection system | |
| EP1514227B1 (en) | Visible authentication patterns for printed document | |
| CA2502232C (en) | Identification document and related methods | |
| CN102457652A (en) | Anti-counterfeiting detection method and anti-counterfeiting maintenance system for document | |
| EP2320389A2 (en) | Visible authentication patterns for printed document | |
| KR101712167B1 (en) | Printed materials and method for checking the authenticity of the print using the security element | |
| KR20110028311A (en) | Method and apparatus for identifying printed plates of documents | |
| CN102800043B (en) | The anti-counterfeiting information stacking method of printed matter, recognition methods and verifying attachment | |
| AU2016360852B2 (en) | Method for authenticating and/or checking the integrity of a subject | |
| CN103761799A (en) | Bill anti-counterfeit method and device based on texture image characteristics | |
| JP5536815B2 (en) | Device and method for preventing forgery using micro security mark | |
| MXPA01007402A (en) | Printing of security documents. | |
| CN1290047C (en) | File anti-fake method and its device based on digital water print | |
| Ryu et al. | Document forgery detection with SVM classifier and image quality measures | |
| US9499006B2 (en) | Anti-counterfeiting feature generation method for valuable document and authentication method and device therefor | |
| EP2812848B1 (en) | Forensic verification utilizing forensic markings inside halftones | |
| US20080037821A1 (en) | System and method for detection of miniature security marks | |
| BRPI0906398A2 (en) | improvement in steganography and the means for its generation and automated reading | |
| Gupta et al. | Paradigm shift in document related frauds: Characteristics identification for development of a non-destructive automated system for printed documents | |
| CN202795404U (en) | Device for detecting anti-counterfeit information of printed matters | |
| US9036913B2 (en) | Secured identification medium and method for securing such a medium | |
| Yawai et al. | Increase the hiding-bit capacity and strength for text watermarking with the line intersection on text image | |
| Nieves et al. | Recognizing banknote patterns for protecting economic transactions | |
| Takahashi et al. | Information embedding method for home printing of certifications | |
| CN1586885A (en) | Card or print matter using digital photosensitive water print type to load information and its producing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: Two building No. 330096, South Science Park, 589 hi tech Avenue, Nanchang hi tech Industrial Development Zone, Jiangxi, 601-608 Applicant after: Jiangxi Jinge Polytron Technologies Inc Address before: 330096, No. 8, building 2, Nanchang University Science Park, Nanchang high tech Avenue, Jiangxi, China Applicant before: Jiangxi Goldgrid Network Technology Co., Ltd. |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: JIANGXI GOLDGRID NETWORK TECHNOLOGY CO., LTD. TO: JIANGXI KINGGRID TECHNOLOGY CO., LTD. |
|
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120516 |