File anti-fake method and its device based on digital water print

A digital watermark and file technology, applied in the field of file anti-counterfeiting technology and its devices, to achieve the effects of improving security, convenient use, and increasing printing costs
CN1290047CInactive Publication Date: 2006-12-13BEIJING UNIV OF POSTS & TELECOMM
3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING UNIV OF POSTS & TELECOMM
Publication Date
2006-12-13
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The present invention discloses file anti-fake method and device based on digital water print. During making certificate and similar file, one pre-designed invisible digital water print is embedded into the file to form anti-fake certificate. When the anti-fake certificate is checked, image scanning and photographing device is used to scan the image in the certificate and extract water print to judge the truth of the certificate. The certificate made through printing and pressing has the picture of the certificate holder and digital water print, which is embedded into the picture and is the random digital sequence produced with the ID number and through enciphering. The method and device can resist the image deformation and degradation caused by printing and scanning, has small computing amount, and is simple, convenient and reliable.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a file anti-counterfeiting technology and its device, in particular to a technology for anti-counterfeiting certificates using digital watermark technology and a device for implementing the technology. Background technique

[0002] The development of information technology and the advancement of high-quality image input and output equipment, especially the popularization of high-precision color inkjet, laser printers and high-precision scanners, have brought a lot of convenience to people's work and life, but also made Forgery and tampering of various identity-related documents such as ID cards, degree certificates, graduation certificates, work permits, passports, and driver's licenses are becoming easier and easier. Cases of using false documents to carry out illegal activities are not uncommon. Relevant data show that in the United States, about 500,000 people are victimized by false documents and documents every year, and t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More