Patent ID: 7295688
Filing Date: 2007-11-13
Classification: G06K

Abstract:
1. A streaked pattern image matching method for matching a first streaked pattern image and a second streaked pattern image, said method comprising steps of: extracting skeleton pixel data that indicate skeletons, said skeletons being lines obtained by thinning each streak of a streaked pattern image; establishing a correspondence between skeleton pixels by specifying pixels among the skeleton pixels of said second streaked pattern image that correspond to skeleton pixels of said first streaked pattern image; retrieving all pixels of said first streaked pattern image and for each first pixel which does not belong to a skeleton thereof, determining whether at least a straight line extending either side of the first pixel crosses two adjacent skeletons at two points for which a correspondence with skeleton pixels of said second streaked pattern image has been found and in the affirmative counting the first pixel as an enclosed pixel; and rating a degree of matching between said first streaked pattern image and said second streaked pattern image based on a number of the enclosed pixels.