IMAGE PROCESSING APPARATUS AND IMAGE DISPLAY APPARATUS

摘要

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.

主权项

1. An apparatus for processing an image, comprising:
a weight calculation unit configured to calculate a weight coefficient to calculate a second gamma characteristic based on a light information of a target image, the second gamma characteristic having a narrower range of lightness than a first gamma characteristic, the first gamma characteristic representing a characteristic of a display connected to the apparatus in the dark; a gamma calculation unit configured to calculate the second gamma characteristic based on the weight coefficient, and to calculate a gamma conversion function based on the second gamma characteristic, wherein 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; and a conversion unit configured to convert pixel values of the target image, based on the gamma conversion function.