| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image recognition device capable of performing detection processing even when illuminating directions and illumination light to an object for recognition are different while reducing memory capacity. <P>SOLUTION: The image recognition device has: a feature point data storage part in which feature point data of a plurality of first feature points extracted from a registered image and a displacement vector from the first feature points to a reference point of the registered image is stored; a feature point extraction part which extracts a second feature point of the object for recognition of the input image; a candidate coordinate point calculation part which calculates a candidate coordinate point of a reference point candidate from coordinates of the second feature point and the displacement vector for every rotation angle obtained by sequentially rotating the displacement vector at a preset unit angle centering around the second feature point; a candidate coordinate point voting part which performs voting by individually integrating a cosine value and a sine value of the rotation angle of the displacement vector for every candidate coordinate point; and an object for recognition determination part which detects a candidate coordinate point with the largest numeric value obtained by adding a square value of an integrated value, considers the detected candidate coordinate point as coordinates of the reference point, and detects the rotation angle as a rotation angle to the object for recognition with respect to the registered image. <P>COPYRIGHT: (C)2012,JPO&INPIT |
