Image analysis – Applications
Reexamination Certificate
2005-09-06
2005-09-06
Johns, Andrew W. (Department: 2621)
Image analysis
Applications
C283S072000
Reexamination Certificate
active
06940995
ABSTRACT:
The present invention relates to a method and apparatus for authenticating various types of digital certificates by using a text embedding method. The execution of the present invention is divided into two case, one case including images in the certificate and another case not including the images in the certificate, according to the characteristics of the certificate. In the former case, a text embedding method is applied to images included in the certificate to embed a series of information text (a specific number of the certificate, and issuing organization, name of a person in charge, etc.) designated by a person who issues the certificate into the images. In the latter case, there is generated an image imperceptible to the human eve but having the same color as the ground color certificate.
REFERENCES:
patent: 2003/0035564 (2003-02-01), Honsinger et al.
patent: WO 00/31675 (2000-06-01), None
Herrigel et al., “An Optical/Digital Identification/Verification System based on Digital Watermarking Technology,”Proc. SPIE vol. 4148: Optoelectronic and Hybrid Optical/Digital Systems for Image/Signal Processing, Sep. 1999, pp. 170-176.
Park et al., “Visible Watermarking using Verfiable Digital Seal Image,”Proc. Symp. on Cryptography and Information Security, Jan. 2001, pp. 103-108.
Bern et al., “Trustworthy Paper Documents,”Proc. 4th Int. Workshop on Information Hiding, LNCSvol. 2137, Apr. 2001, pp. 1-12.
Sun et al., “An Optical Watermarking Solution for Authenticating Printed Documents,”Proc. Int. Conf. on Information Technology: Coding and Computing, Apr. 2001, pp. 65-70.
Choi Gi Chul
Choi Jong Uk
Johns Andrew W.
Markany Inc.
Powers Senniger
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