| 摘要 |
PROBLEM TO BE SOLVED: To quickly and fully detect whether an image similar at least to a given image searched for is present in an input image as a search object or not. SOLUTION: An image detector 10 comprises an image inputting part 1, a color converting part 2, a search region setting part 3, a hue/modified saturation (HQ) histogram preparing part 4, an HQ histogram comparing part 5, a similarity determining part 6, a region position storing part 7 and a similar region information outputting part 8, and searches to determine whether an image searched for is present in an input image or not. A rough search for determining similarity according to a color histogram with low gradation resolution first computes a candidate region wherein the image searched for is possibly present, and a detailed search for determining similarity according to a color histogram with high gradation resolution next detects a region wherein the image searched for is present in the candidate region. |
