发明申请
- 专利标题： Black and white image detection
- 专利标题（中）： 黑白图像检测
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申请号： US10406919申请日： 2003-04-04
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公开(公告)号： US20040196515A1公开(公告)日： 2004-10-07
- 发明人: Hanqiang Huang , Yung-Kai Lai
- 申请人： MATCH LAB, INC.
- 申请人地址： null
- 专利权人： MATCH LAB, INC.
- 当前专利权人： MATCH LAB, INC.
- 当前专利权人地址： null
- 主分类号： H04N001/46
- IPC分类号： H04N001/46 ; H04N001/40
摘要：
A method and apparatus for classifying an input image as black and white or color is described. The method calculates a first ratio of a color pixel portion to a total pixel portion in the input image. Next, the method calculates a second ratio of the color pixel portion to a combined pixel portion in the input image, where the combined pixel portion comprises the color pixel portion and a dark black and white pixel portion. Finally, the method returns an indication the input image is black and white if the first ratio is less than a first threshold and the second ratio is less than a second threshold.
公开/授权文献
- US07307766B2 Black and white image detection 公开/授权日：2007-12-11
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