发明名称 |
Image signal processing apparatus, image signal processing method and camera using the image signal processing apparatus |
摘要 |
When clamping a signal from a solid state image sensor, float of an optical black pixel output due to incoming of infrared light avoids a malfunction of a clamp from occurring. When clamping a signal from the solid state image sensor, the difference between the optical black pixel output and a clamp target level is output as a difference output, the difference output is compared with a comparison level to integrate the number of times larger than the comparison level every horizontal line. When the number of times is equal to or more than a certain rate (⅔) from the number of optical black pixels on the horizontal line, an optical black float state is determined and clamping operation is performed in accordance with a held value immediately before.
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申请公布号 |
US8223228(B2) |
申请公布日期 |
2012.07.17 |
申请号 |
US20100783323 |
申请日期 |
2010.05.19 |
申请人 |
SHIRAI TAKAHIRO;YOSHIDA DAISUKE;CANON KABUSHIKI KAISHA |
发明人 |
SHIRAI TAKAHIRO;YOSHIDA DAISUKE |
分类号 |
H04N9/64;H04N5/33 |
主分类号 |
H04N9/64 |
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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