Patent ID: 9319647
Filing Date: 2016-04-19
CPC Classification: G06T,H04N

Claim Text:
1. An image processing device comprising: a camera which takes an image using an image pickup device including an arrangement of a plurality of color light-receiving pixels which receive light through a color filter and a plurality of transparent light-receiving pixels which receive light without using a color filter; a computer, including at least a central processing unit, communicatively coupled to the camera; and a non-transitory computer readable medium storing instructions for controlling the central processing unit to function as an image generation unit which generates at least one of a high-sensitivity image and a wide dynamic range image based on a corrected gradation value of each of a plurality of color pixels, for an original image taken by the camera, the original image including an arrangement of the plurality of color pixels having gradation values individually assigned according to the received light levels of the respective color light-receiving pixels and a plurality of transparent pixels having gradation values individually assigned according to the received light levels of the respective transparent light-receiving pixels, by calculating, for each of the plurality of color pixels, the corrected gradation value in which a first reference gradation value of gray calculated based on the gradation value of itself or the gradation values of other color pixels arranged in the periphery is corrected according to the gradation values of transparent pixels arranged in the periphery, wherein: the image generation unit generates the high-sensitivity image by assigning the corrected gradation value of each of the plurality of color pixels and the gradation value of each of the plurality of transparent pixels as gradation values of pixels in a corresponding arranged positions of the high-sensitivity image, the color filter is a three-primary-color filter and the color light-receiving pixel receives light through a filter of any one of the three primary colors. the image generation unit calculates, for each transparent pixel of the original image, the gradation values of the three primary colors on the basis of the gradation values of the color pixels arranged in the periphery and calculates a gradation difference degree between a second reference gradation value of gray calculated from the gradation values of the three primary colors and the gradation value of itself, the image generation unit calculates, for each color pixel of the original image, the gradation values of the three primary colors on the basis of the gradation value of itself or the gradation values of other color pixels arranged in the periphery and calculates the first reference gradation value from the gradation values of the three primary colors, and the image generation unit calculates the corrected gradation value by correcting the first reference gradation value on the basis of the gradation difference degree of the transparent pixels arranged in the periphery.