| 摘要 |
The conventional image retrieving method is not satisfactory in accuracy of retrieval. There has been a demand for a general-purpose method capable of rapidly retrieving characteristic parts. The object is achieved by acquiring image data representing an image with pixels arranged in a dot matrix pattern, detecting the edge pixels of the image according to the image data, extracting the edge pixel as the characteristic point when a pattern formed by the detected edge pixels and their neighboring pixels is similar to a prescribed object to be extracted, and defining as the characteristic region the prescribed region in the image which has the extracted characteristic points in large number.
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