发明名称 FOCUS DETECTING DEVICE
摘要 PURPOSE:To improve the probability of focusing on a subject that a photographer intends by grouping focus detection results of focus detection areas, selecting the group which is considered to match the intention of the photographer most, and obtaining a final focus detection result from the group by statistical averaging. CONSTITUTION:A focus detecting means 2 performs focus detection arithmetic for data of image sensors corresponding to focus detection areas AREA (j) (j=1-f) to find the defocusing quantities of the focus detection areas and a grouping means 3 classifies focus detection areas where the same subject is considered to be acquired in several groups. An optimum group selecting means 4 selects the best group where a subject which is a subject that the photographer intends with high possibility is acquired. An optimum defocusing quantity arithmetic means 5 calculates the best defocusing quantity of the whole system from the defocusing quantities of the focus detection areas in the best group. Consequently, the probability of focusing on the specific subject that the photographer intends can be increased.
申请公布号 JPH02178641(A) 申请公布日期 1990.07.11
申请号 JP19880331748 申请日期 1988.12.29
申请人 NIKON CORP 发明人 KUSAKA YOSUKE;UTAGAWA TAKESHI;UCHIYAMA SHIGEYUKI;KUWATA TOMOYUKI;YAMANO SHOZO
分类号 G03B13/36;G02B7/28;G02B7/34 主分类号 G03B13/36
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