In-focus detection apparatus using video signal
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United States of America Patent
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Jul 6, 1993
Grant Date -
N/A
app pub date -
Feb 27, 1992
filing date -
Mar 1, 1991
priority date (Note) -
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Abstract
An in-focus detection apparatus used for a video camera includes edge width detector for detecting a plurality of edge widths of an object, and an calculation device for calculating the amount of driving a lens based on the distribution state of these plurality of edge width data. The apparatus uses a video signal and provides the in-focus state of an actual object with a high accuracy without requiring slight movement of a focusing lens.
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