Image signal processing apparatus, image signal processing method, and image capturing apparatus
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United States of America Patent
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May 24, 2016
Grant Date -
Aug 27, 2015
app pub date -
Feb 20, 2015
filing date -
Feb 21, 2014
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Abstract
An image signal processing apparatus includes an image signal input unit; a gradation decrease evaluation device that evaluates a decrease in gradation within a certain area in image signals; a gradation loss evaluation device that evaluates a degree of gradation loss within a certain area in image signals; an image signal correction device that performs signal level correction processing on image signals and outputs the processing result; and an image signal correction control device that controls strength of correction by the image signal correction unit, using both the gradation decrease evaluated value which is output by the gradation decrease evaluation device and the gradation loss evaluated value which is output by the gradation loss evaluation unit.
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