Image processing apparatus and image display apparatus
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United States of America Patent
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Aug 2, 2016
Grant Date -
Jul 3, 2014
app pub date -
Dec 27, 2013
filing date -
Dec 27, 2012
priority date (Note) -
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Abstract
An image processing apparatus includes a weight calculation unit, a gamma calculation unit, and a conversion unit. The weight calculation unit calculates a weight coefficient to calculate a second gamma characteristic based on light information of an image. The second gamma characteristic has a narrower range of lightness than a first gamma characteristic. The first gamma characteristic represents a characteristic of a display connected to the apparatus in the dark. The gamma calculation unit calculates the second gamma characteristic based on the weight coefficient, and calculates a gamma conversion function based on the second gamma characteristic. The second gamma characteristic more approximates a lightness of the first gamma characteristic if the light information is darker, and more approximates a gradation of the lightness of the first gamma characteristic if the light information is brighter. The conversion unit converts pixel values of the image, based on the gamma conversion function.
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