发明名称 |
Self-adaptive binarization of digital images |
摘要 |
The present invention provides a unique method, apparatus, system and storage medium for image binarization process, wherein an image to be processed is divided into a plurality of sub-images and an binarization threshold for each of the sub-images is determined based on the gray-levels of the edge pixels detected in respective sub-image. The image processing method of the present invention comprises: calculating a gray-level statistical distribution of pixels of an image, detecting edge pixels in an image based on an edge criterion corresponding to the gray-level statistical distribution, dividing the image into a plurality of sub-images; determining a binarization threshold for each of the sub-images based on the gray-levels of edge pixels detected in the sub-image; and performing binarization process for each of the sub-images based on the binarization threshold of the sub-image. |
申请公布号 |
EP1282076(A3) |
申请公布日期 |
2007.06.20 |
申请号 |
EP20020255340 |
申请日期 |
2002.07.31 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
LI, YULIN;WANG, JIE;ZHAO, HONGSHENG |
分类号 |
G06T5/00;G06K9/38;G06T7/00;H04N1/403 |
主分类号 |
G06T5/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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