| 摘要 |
PROBLEM TO BE SOLVED: To obtain a surveillance camera block detector performing block detection stably even in various scenes of the different number of edges and even for such an object as a variation in lightness takes place only partially. SOLUTION: The surveillance camera block detector comprises a section for taking in an inputted image, a section for detecting an intruder from the input image, a section for automatically taking in a reference image becoming a criterion for deciding whether blocking action is taken on the input image or not, a reference image update timing generating section for providing the reference image taking section with a signal for designating to take in the reference image, a section for comparing the image feature between each of a plurality of reference images thus taken in and an input image to determine the degree of mismatch between images and outputting the lowest degree of mismatch as the degree of the mismatch of the input image, and a section for making a decision whether block action is taken or not based on the degree of the mismatch and the temporal variation of the input image and the output signal from the intruder detecting section. COPYRIGHT: (C)2005,JPO&NCIPI
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