发明名称 |
Method and apparatus for controlling exposure of camera |
摘要 |
An exposure control method and apparatus for a camera having a two-area divided brightness measurement system. A central light value is determined based on a central area brightness of a photographic scene, and a peripheral light value is determined based on a peripheral area brightness of the scene. After determining by comparison between the central and peripheral light values whether the scene is back-lighted or front-lighted, a correction coefficient specific to back-lighted scenes or that specific to front-lighted scenes is read from a memory. An exposure value suitable for a main subject is calculated according to the following equation:wherein Es represents the exposure value and alpha represents the correction coefficient.
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申请公布号 |
US6275659(B1) |
申请公布日期 |
2001.08.14 |
申请号 |
US19980021393 |
申请日期 |
1998.02.10 |
申请人 |
FUJI PHOTO FILM CO., LTD. |
发明人 |
ISHIHARA FUMIO;NARUSE MUTSUMI;KOHNO TAKANORI;SAKAMOTO TETSUO;KOBAYASHI KOUICHI;TONGU TERUYUKI;NAKAGAWA NORIFUMI;KUROSU TOMIO |
分类号 |
G03B7/099;G03B7/28;(IPC1-7):G03B7/08 |
主分类号 |
G03B7/099 |
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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