Patent ID: 9161001
Filing Date: 2015-10-13
Classification: H04N

Abstract:
1. An image capturing apparatus comprising: an image sensor configured to photoelectrically convert incident light into an image signal and to output the image signal; an exposure time acquisition unit configured to acquire exposure time; a gain control unit configured to control a gain; a temperature detection unit configured to detect a temperature; and a color suppression unit configured to determine, from at least one of the exposure time multiplied by a first coefficient and acquired by the exposure time acquisition unit and the temperature multiplied by a second coefficient and detected by the temperature detection unit, a noise level that changes with the exposure time and the temperature and to suppress, on the basis of a level of color deviation that corresponds to the determined noise level and of the gain controlled by the gain control unit, a color component of the image signal that is output from the image sensor so that the color deviation is reduced, wherein the determined noise level is a sum of a noise level of a noise caused by a dark current and a noise due to a difference in levels between a signal obtained in a situation in which an effective region of the image sensor was not exposed and a signal output from an optical black region of the image sensor, and wherein the first coefficient and the second coefficient are determined according to characteristics of the image sensor; wherein the color component from the image sensor is suppressed based on color components within a predetermined range of colors corresponding to the color component.