Auto-focusing apparatus with hill-climbing and full-scanning auto-focusing performances
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United States of America Patent
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Oct 10, 2000
Grant Date -
N/A
app pub date -
Sep 4, 1998
filing date -
Sep 8, 1997
priority date (Note) -
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Abstract
An auto-focusing apparatus comprises an image sensing element for photo-electrically converting an image focused by an focal lens into an image signal, an image sensing circuit for processing an image signal, an A/D converter for converting the image signal output from the image pickup circuit into a digital image signal, and an AE processing circuit and an AF processing circuit respectively for performing an automatic exposure process and an auto-focusing process, on the basis of the digital image signal, and determines the brightness of the subject on the basis of AE and AF evaluation values respectively obtained by the AE processing circuit and the AF processing circuit, and performs the auto-focusing process according to a hill-climbing AF method for a bright subject and the auto-focusing process according to the full-scanning AF method for a non-bright subject.
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Cited Art Landscape
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