IMAGE FEATURE EXTRACTION DEVICE, IMAGE FEATURE EXTRACTION METHOD, IMAGE FEATURE EXTRACTION PROGRAM, RECORDING MEDIUM STORING IMAGE FEATURE EXTRACTION PROGRAM, IMAGE SIMILARITY CALCULATION DEVICE EQUIPPED WITH IMAGE FEATURE EXTRACTION DEVICE, IMAGE SIMILARITY CALCULATION METHOD, IMAGE SIMILARITY CALCULATION PROGRAM, AND RECORDING MEDIUM STORING IMAGE SIMILARITY CALCULATION PROGRAM

摘要

PROBLEM TO BE SOLVED: To solve the problem that image feature extraction and similarity calculation are affected by illumination. SOLUTION: This device applies prescribed image correction to input image data, outputs the corrected image data (101), applies a plurality of predetermined top hat processing to the corrected image data, generates a plurality of images subjected to morphological processing to be output (101), outputs an integrated image obtained by conducting weighted addition of multiplying the output images subjected to the morphological processing with specified weighting factors, to be added (103), and calculates an image feature amount (104), based on the output integrated image. The similarity is calculated using the image feature amount calculated by the device. COPYRIGHT: (C)2009,JPO&INPIT