US 11,694,366 B2
Image processing apparatus, image processing method, and storage medium using image processing technique for evaluating colors of a captured object
Kimitaka Arai, Kanagawa (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jun. 4, 2021, as Appl. No. 17/339,743.
Claims priority of application No. 2020-101701 (JP), filed on Jun. 11, 2020.
Prior Publication US 2021/0390740 A1, Dec. 16, 2021
Int. Cl. G06T 7/90 (2017.01); G06T 11/20 (2006.01); G06T 7/11 (2017.01)
CPC G06T 7/90 (2017.01) [G06T 7/11 (2017.01); G06T 11/206 (2013.01); G06T 2200/24 (2013.01)] 17 Claims
OG exemplary drawing
 
17. A method comprising:
obtaining a first image and a second image obtained by capturing images of a target object under different capturing conditions;
obtaining area information for each of the first image and the second image, the area information being set in an area corresponding to the object and specifying a reference area serving as a reference for comparison and a comparison target area serving as a target for the comparison;
generating a color conversion parameter for carrying out a color conversion such that a color value of the reference area in the second image coincides with a color value of the reference area in the first image; and
carrying out, based on the color conversion parameter, the color conversion of the color value of the reference area and a color value of the comparison target area in the second image and deriving a color difference between the reference area and the comparison target area in the second image after the color conversion.