Automatic focusing device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 21, 2003
Grant Date -
N/A
app pub date -
May 20, 1999
filing date -
May 16, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Based on a video signal from a CCD (3), an exposure evaluation value producing circuit (8) produces an exposure evaluation value for automatic exposure, a focus evaluation value producing circuit (9) produces a focus evaluation value for autofocus, a prescribed value is set as a threshold value if the aperture area of an iris detected by a diaphragm amount detecting circuit (11) is equal to or higher than a prescribed value, and a threshold value is set according to the aperture area of the iris if the area is equal to or smaller than the prescribed value. If a luminance signal is larger than the reference value, integration of the high frequency component of a region having a luminance level equal to or higher than the threshold value is excluded.
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Cited Art Landscape
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