发明名称 |
Digital electronic still-video camera and method of controlling same |
摘要 |
An analog/digital converting circuit necessary for recording processing is also used when exposure control is performed employing digital image data. A gamma corrector circuit 10 capable of being changed over between a gamma-correction characteristic and a linearly proportional characteristic in response to depression of a two-stage shutter release button is provided. When exposure control is carried out, changeover of the gamma-corrector circuit 10 is controlled in such a manner that the input/output characteristic of the circuit will be a linearly proportional characteristic. When exposure control is performed, a b terminal of a changeover switch 14 is connected to the A/D converting circuit 13 so that a photometric value is calculated using circuits 15, 16, and 17. When processing for recording image data is executed, changeover of the gamma-corrector circuit 10 is controlled is such a manner that the output signal thereof takes on the value of the input signal raised to the 0.45 power, and an a terminal of the changeover switch 14 connected to the A/D conversion circuit 13. The image data is recorded on a memory card 40 using circuits 31, 32, 33 and 34.
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申请公布号 |
US5436656(A) |
申请公布日期 |
1995.07.25 |
申请号 |
US19930118677 |
申请日期 |
1993.09.10 |
申请人 |
FUJI PHOTO FILM CO., LTD. |
发明人 |
SOGA, TAKASHI;KAWAGUCHI, RYUJI;MIYAKE, IZUMI |
分类号 |
H04N5/232;H04N5/235;H04N5/243;(IPC1-7):H04N5/225 |
主分类号 |
H04N5/232 |
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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