Patent ID: 6337926
Filing Date: 2002-01-08
Classification: G06K

Abstract:
An image recognition method of recognizing a plurality of images from an input image, the plurality of images to be recognized includes at least one of a specific image and images provided by rotating the specific image, the method comprising the steps of:preparing at least one mask area on a window area for each image to be recognized, the window area being structured by cells which are two-dimensionally arrayed each cell being formed of at least one pixel, the mask area being structured by at least one of the cells and corresponding to an area representing a feature of the image to be recognized; performing logical operations on pixel density values in each mask area to determine whether there exists an image to be recognized in the mask based on the result of the logical operations; and determining whether there exists any of the plurality of images to be recognized in the window area based on the determination of whether the image to be recognized exists in the mask area.