US 11,057,598 B2
Image processing apparatus, image capturing apparatus, image processing method, and storage medium
Tetsuya Hata, Yokohama (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Aug. 21, 2019, as Appl. No. 16/546,450.
Claims priority of application No. JP2018-160601 (JP), filed on Aug. 29, 2018.
Prior Publication US 2020/0077067 A1, Mar. 5, 2020
Int. Cl. H04N 5/225 (2006.01); H04N 9/64 (2006.01); H04N 9/04 (2006.01)
CPC H04N 9/646 (2013.01) [H04N 9/04 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An image processing apparatus comprising at least one processor and/or at least one circuit which function as:
a first tone correction unit configured to generate a second image signal by applying, to a first image signal, first tone correction processing conforming to a first tone correction characteristic;
a determination unit configured to determine a second tone correction characteristic;
a second tone correction unit configured to generate a fourth image signal by applying, to a third image signal, second tone correction processing conforming to the second tone correction characteristic;
a generation unit configured to generate a fifth image signal by compositing a luminance component of the second image signal and a color difference component of the fourth image signal; and
a first tone conversion unit configured to generate a sixth image signal by applying, to the fifth image signal, first tone conversion processing conforming to a non-linear first tone conversion characteristic,
wherein the determination unit determines the second tone correction characteristic based on the first tone correction characteristic and a non-linear second tone conversion characteristic.