Patent ID: 8055901
Filing Date: 2011-11-08
Classification: G06K,H04N

Abstract:
1. A method of performing document image correction with a document reader, comprising: generating a document image representative of a document having a deformation, each document belonging to a particular class of document; decoding an optical pattern embedded in the document from the document image to determine an optical signature for the document, the optical signature is unique to each particular class of document, wherein the optical signature is determined based on a histogram function, the histogram function having inputs comprising the number of red pixels, the number of green pixels, and the number of blue pixels in the optical pattern; receiving document classification data associated with the optical signature wherein the classification data is unique for each particular class of document; applying an image correction technique to the document image based on the document classification data to generate a corrected document image; and wherein the method further comprises decoding an identifier embedded in the document from the corrected document image to authenticate the document.