Contour-information extracting method by use of image processing, pattern model creating method in image processing, pattern model positioning method in image processing, image processing apparatus, image processing program, and computer readable recording medium

摘要

There is provided a pattern model creating method in image processing, which allows selection of an appropriate contour in accordance with an object image, the method being a pattern model creating method in image processing for positioning by searching an object to be searched that is similar to a pre-registered image out of an image to be searched by use of a pattern model corresponding to the registered image, the method including: extracting a plurality of edge points from the registered image; creating a plurality of continuous chains by coupling adjacent edge points among the plurality of extracted edge points; eliminating a chain with a length not larger than a predetermined length among the plurality of chains; selecting chains sequentially from the smallest chain among the remaining chains; and regarding aggregation of the selected chains as a contour extracted from the registered image, to construct a pattern model for positioning.