发明名称 |
Image signal processing apparatus |
摘要 |
An image signal is input to two LPFs having different transmission characteristics. A selector chooses one of outputs of the respective LPFs and delivers the chosen output to a gamma correction circuit. The switching of the selector is controlled by a filter control circuit. In the filter control circuit, a comparator compares an exposure time E of a current frame with a threshold value R. The selector is controlled so as to select an output of one of the LPFs that has a lower cutoff frequency and a greater noise component elimination effect than the other LPF does if the exposure time E is longer than or equal to the threshold value R.
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申请公布号 |
US2005185223(A1) |
申请公布日期 |
2005.08.25 |
申请号 |
US20050038383 |
申请日期 |
2005.01.21 |
申请人 |
SANYO ELECTRIC CO., LTD. |
发明人 |
TAKAHASHI TATSUYA;NAKAI TOMOMICHI;NAKAKUKI TOSHIO |
分类号 |
H04N5/208;H04N1/40;H04N1/409;H04N5/213;H04N5/225;H04N5/232;(IPC1-7):H04N1/40 |
主分类号 |
H04N5/208 |
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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