| 摘要 |
An image signature to be used for matching is generated by the following generation method. First, region features are extracted from respective sub-regions of a plurality of pairs of sub-regions in an image, and for each of the pairs of sub-regions, a difference value between the region features of two sub-regions forming a pair is quantized. When performing the quantization, the difference value is quantized to a particular quantization value if an absolute value of the difference value is smaller than a predetermined value. Then, a collection of elements which are quantization values calculated for the respective pairs of sub-regions is used as an image signature to be used for discriminating the image. An image signature matching device matches an image signature of a first image and an image signature of a second image, generated by the above-described generation method, in such a manner that a weight of an element having the particular quantization value is reduced. |
