Patent ID: 8311341

Claim:
A system for finding a distance between query and reference images, comprising: a computer; software, running on said computer, said software performing the functions of: (a) identifying a degree of rotation between an object identified in said query image and an object identified in a reference image; (b) dividing said query and reference images into blocks of pixels and identifying corresponding blocks in said reference image; (c) applying an offset from said blocks of pixels in said query image to aid corresponding block of pixels in said reference image, said being offset based on said identified degree of rotation between said object in said query image and said object in said reference image; (d) comparing each of said blocks in said query image to a corresponding block in said reference image with said applied offset, using a block matching algorithm; (e) determining the percentage of blocks from said query image that match a corresponding block in said reference image; and (f) determining said distance between said query and said reference images based on said percentage of matches.