发明授权
- 专利标题: Exposure calculating apparatus for camera
- 专利标题(中): 照相机曝光计算装置
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申请号: US852975申请日: 1992-03-17
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公开(公告)号: US5266984A公开(公告)日: 1993-11-30
- 发明人: Masaru Muramatsu , Hiroyuki Iwasaki , Hiroyuki Abe
- 申请人: Masaru Muramatsu , Hiroyuki Iwasaki , Hiroyuki Abe
- 申请人地址: JPX Tokyo
- 专利权人: Nikon Corporation
- 当前专利权人: Nikon Corporation
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX3-83665 19910322; JPX3-149482 19910524
- 主分类号: G03B7/099
- IPC分类号: G03B7/099 ; G03B7/08
摘要:
An exposure calculating apparatus for a camera has a plurality of processing devices for variously processing photometric outputs from regions of an object field divided into plural sections according to photographic conditions so as to determine the optimum exposure value according to the results of processes performed by the processing devices, the exposure calculating apparatus for a camera including: a device for setting a plurality of fuzzy rules in the form of membership functions corresponding to the processes performed by the plurality of processing devices; a device for calculating the grade of each of the fuzzy rules according to a plurality of values of photometry generated from photometric outputs from the plurality of regions; a device which selects fuzzy rules having the grades obtained by the calculations so as to calculate, according to the plurality of photometric outputs, exposure values obtained by the processes performed by the processing device which correspond to the selected fuzzy rules; and a device for determining the optimum exposure value by weighting, with the grade, each of the exposure values obtained by the processes performed by the processing devices.