发明授权
US07038720B2 Pixel-by-pixel digital control of gain and offset correction for video imaging
有权
像素逐像素数字控制增益和偏移校正视频成像
- 专利标题： Pixel-by-pixel digital control of gain and offset correction for video imaging
- 专利标题（中）： 像素逐像素数字控制增益和偏移校正视频成像
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申请号： US10273407申请日： 2002-10-16
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公开(公告)号： US07038720B2公开(公告)日： 2006-05-02
- 发明人: Charles Andrew Rogers , Richard Leigh Gower , Bhupendra Kumar Ahuja
- 申请人： Charles Andrew Rogers , Richard Leigh Gower , Bhupendra Kumar Ahuja
- 申请人地址： US CA Fremont
- 专利权人： Exar Corporation
- 当前专利权人： Exar Corporation
- 当前专利权人地址： US CA Fremont
- 代理机构： Townsend and Townsend and Crew LLP
- 主分类号： H04N5/217
- IPC分类号： H04N5/217
摘要：
A method and apparatus for adjusting, on a pixel-by-pixel basis, the gain and offset in an AFE as the pixels are sequentially processed. Although the method can be used for any purpose, it is directed in particular to light source non-linearity, such as edge effects of a scanner. A unique clocking method clocks the gain and offset values into the register at a higher clock rate than the image sampling rate.