Patent ID: 8467442
Filing Date: 2013-06-18
Classification: G06K

Abstract:
1. An image search device that searches an object encoded code stream formed by compression coding of a plurality of frames for a frame generally coincident with a specific one, the device comprising: a decoding means for making entropy decoding of the object encoded code stream to generate quantization coefficients of each frame; a matching means for making matching between the quantization coefficients of the specific frame and those of each frame which are generated by the decoding means and correspond in sample position to those of the specific frame; and a judging means for judging, based on the result of matching, whether the frame is generally coincident with the specific one, wherein the judging means increases the count of a counter each time there arises a frame whose quantization coefficients do not match in sign with those of the specific frame, and decides that the frame is generally coincident with the specific one in case the count when the matching of all the quantization coefficients of the frame with those of the specific frame is over is smaller than a predetermined threshold.