Auto-contrast enhancement system
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United States of America Patent
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Jun 21, 2016
Grant Date -
Apr 14, 2016
app pub date -
Oct 10, 2014
filing date -
Oct 10, 2014
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Abstract
An auto-contrast enhancement system includes a human visual system (HVS)-based local difference (LD) histogram unit configured to build a LD histogram with respect to intensity values; a histogram classifier configured to categorize histograms of input images based on distribution properties; and a histogram equalization (HE) unit configured to process the input image according to a result of the HVS-based LD histogram unit and the enhancement level determined in the histogram classifier.
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