Method, apparatus and system for dynamic range estimation of imaged scenes
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United States of America Patent
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Feb 10, 2015
Grant Date -
Dec 30, 2010
app pub date -
Sep 2, 2010
filing date -
Aug 30, 2006
priority date (Note) -
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Abstract
A method, apparatus, and system for dynamic range estimation of imaged scenes for automatic exposure control. For a given exposure time setting, certain areas of a scene may be brighter than what a camera can capture. In cameras, including those experiencing substantial lens vignetting, a gain stage may be used to extend dynamic range and extract auto-exposure data from the extended dynamic range. Alternatively, dynamic range can be extended using pre-capture image information taken under reduced exposure conditions.
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