System and method for generating and verifying a...

Image analysis – Applications

Reexamination Certificate

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C382S112000, C340S005860

Reexamination Certificate

active

10370175

ABSTRACT:
Described are a system and method for verifying a self-authenticating document. First, an image is obtained of at least a predetermined portion of the document. Then, the image is divided into a predetermined number of pixel groups, each pixel group including a plurality of pixels and pixel characteristic data for each pixel is determined. A pixel group classification data for each pixel group is determined as a function of the pixel characteristics data. Based on the pixel group classification data and a location of the corresponding pixel group in the image, a characteristic digital data “CDD” for the image is generated. The CDD is added to the document. Upon a request for verification of the document, the CDD is extracted from the document. Then, a further CDD based on the image is generated. The document is verified only if the CDD is substantially identical to the further CDD.

REFERENCES:
patent: 5765176 (1998-06-01), Bloomberg
patent: 6487301 (2002-11-01), Zhao
patent: 6608911 (2003-08-01), Lofgren et al.
patent: 6751352 (2004-06-01), Baharav et al.
patent: 6929413 (2005-08-01), Schofield
patent: 6970573 (2005-11-01), Carr et al.
patent: 2005/0161512 (2005-07-01), Jones et al.

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