发明名称 |
Digital camera, having a flash unit, which determines proper flash duration through an assessment of image luminance and, where needed, a preliminary flash emission |
摘要 |
A digital camera includes a flash lamp and a CCD imager. A microcomputer first exposes the CCD imager without a light-emission of the flash lamp. Therefore, a luminance evaluation value is calculated by a calculator on the basis of a luminance signal included in a camera signal generated by the CCD imager. The microcomputer succeedingly makes the flash lamp perform a preliminary light-emission, and exposes the CCD imager by {fraction (1/1500)} seconds. The calculator evaluates the luminance evaluation value on the basis of the luminance signal included in the camera signal obtained at this time. Then, the microcomputer calculates a major light-emission amount of the flash lamp on the basis of the two luminance evaluation values obtained in such a manner.
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申请公布号 |
US6441856(B1) |
申请公布日期 |
2002.08.27 |
申请号 |
US20000665087 |
申请日期 |
2000.09.20 |
申请人 |
SANYO ELECTRIC CO., LTD. |
发明人 |
SUGIMOTO KAZUHIKO |
分类号 |
G03B7/16;H04N5/235;(IPC1-7):H04N5/222 |
主分类号 |
G03B7/16 |
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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