抄録
This paper proposes a method to search a target image area that has arbitrary location and inclination in an objective image. The method uses the curvature of an edge pixel that is an invariant characteristic to location and inclination of a target image area. The curvature of an edge pixel and the distance between the central pixel and the edge pixel are measured in a circular image area. The stored value in the two-dimensional space that is spread by the curvature and the distance is incremented. This process is repeated about all edge pixels in the circular image area. The matching is executed between the two-dimensional spaces that are generated by the circular template image and generated by a circular image area in an objective image. The experimental results show that the recognition rate of the target image areas recorded 97.8% about four kinds of images. The averaged processing time to search the target image areas was 20.4 seconds.
