A plurality of image data are stored in a hard disk device in correspondence with their image feature amounts. An image is input using an input window. A CPU computes the image feature amount of the input image. The CPU also computes image similarity on the basis of the computed image feature amount...http://www.google.com/patents/US6968095?utm_source=gb-gplus-sharePatent US6968095 - Image search apparatus and method, and computer readable memory