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IMAGE FEATURE EXTRACTION APPARATUS, IMAGE RETRIEVAL SYSTEM, VIDEO FEATURE EXTRACTION APPARATUS, AND QUERY IMAGE RETRIEVAL SYSTEM, AND THEIR METHODS, PROGRAM, AND COMPUTER READABLE RECORDING MEDIUM
IMAGE FEATURE EXTRACTION APPARATUS, IMAGE RETRIEVAL SYSTEM, VIDEO FEATURE EXTRACTION APPARATUS, AND QUERY IMAGE RETRIEVAL SYSTEM, AND THEIR METHODS, PROGRAM, AND COMPUTER READABLE RECORDING MEDIUM
PROBLEM TO BE SOLVED: To provide an image feature extraction apparatus having versatile applicability and a wide application range.;SOLUTION: The image feature extraction apparatus 1 is provided with a DCT transformer 3 for generating a DCT quantization result obtained by executing DCT transform of YUV values converted from RGB values of image data and quantizing the DCT transform result, an element selection part 2 for selecting a DCT element from DCT elements of the DCT quantization result on the basis of an element selection table for selecting a DCT element corresponding to a feature to be extracted and outputting a feature bit string obtained by allocating a code to the selected DCT element, and a real number index conversion part 4 for converting the feature bit string output from the element selection part 2 into a real number index.;COPYRIGHT: (C)2008,JPO&INPIT
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