Patent ID: 9288456
Filing Date: 2016-03-15
CPC Classification: H04N

Claim Text:
1. An image processing apparatus comprising: an input unit configured to input first image data obtained by capturing an image of a subject under a first light condition, and second image data obtained by capturing an image of the subject under a second light condition different from the first light condition; an acquisition unit configured to acquire sampling positions of colors used to generate correction parameters; a sampling unit configured to sample first color signal values from the sampling positions in the first image data, and to sample second color signal values from the sampling positions in the second image data; and a generation unit configured to generate correction parameters, used to correct the first image data which depends on the first light condition into image data which depends on the second light condition, based on the first color signal values and the second color signal values, wherein the generation unit comprises: a first generator configured to generate color correction parameters used to transform the first color signal values into the second color signal values; and a second generator configured to calculate a first luminance value from the first color signal values, to calculate a second luminance value from a correction value obtained by correcting the first color signal values using the color correction parameters, and to calculate tone correction parameters used to transform the first luminance value into the second luminance value, and wherein at least one of the input unit, the acquisition unit, the sampling unit, or the generation unit is implemented at least in part by hardware components of the image processing apparatus.