Patent ID: 6597806
Filing Date: 2003-07-22
Classification: G06K,G06T

Abstract:
A method of processing an image of an object to obtain a dimension-difference relating amount which relates to a difference of an actual dimension of the object from a reference dimension thereof, the method comprising the steps of:producing a plurality of search lines each of which perpendicularly intersects a corresponding one of a plurality of substantially straight portions of an edge of the image of the object, and obtaining the dimension-difference relating amount based on a sum of a plurality of products each of which is obtained by multiplying a corresponding one of respective edge-point deviations of respective actual edge points where the search lines intersect the straight portions of the edge, respectively, from respective reference edge points on the search lines, in respective directions parallel to the search lines, by a corresponding one of respective parallel-direction distances of the reference edge points from a dimension center of the image of the object in the respective directions parallel to the search lines.