发明授权
US4734571A Focus condition detecting device having correlation calculation means
and means for determining the range of shifts of image signals
失效
具有相关计算装置的焦点条件检测装置和用于确定图像信号的偏移范围的装置
- 专利标题： Focus condition detecting device having correlation calculation means and means for determining the range of shifts of image signals
- 专利标题（中）： 具有相关计算装置的焦点条件检测装置和用于确定图像信号的偏移范围的装置
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申请号： US924888申请日： 1986-10-30
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公开(公告)号： US4734571A公开(公告)日： 1988-03-29
- 发明人: Masataka Hamada , Tokuji Ishida , Toshihiko Karasaki , Toshio Norita , Nobuyuki Taniguchi
- 申请人： Masataka Hamada , Tokuji Ishida , Toshihiko Karasaki , Toshio Norita , Nobuyuki Taniguchi
- 申请人地址： JPX Osaka
- 专利权人： Minolta Camera Kabushiki Kaisha
- 当前专利权人： Minolta Camera Kabushiki Kaisha
- 当前专利权人地址： JPX Osaka
- 优先权： JPX60-245130 19851030
- 主分类号： G02B7/28
- IPC分类号： G02B7/28 ; G02B7/34 ; G03B13/36 ; G01J1/20 ; G03B3/00 ; G03B13/18
摘要：
There is disclosed a focus condition detecting device for a camera.The focus condition detecting device has a preliminary correlation calculation means for calculating correlations between first and second image signals with a relatively low accuracy and a principal correlation calculation means for calculating correlations between first and second image signals with a relatively high accuracy on the basis of data obtained in the preliminary correlation calculation.
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