US 12,149,835 B2
Image processing apparatus, image capturing apparatus, control method, and storage medium
Hiroaki Nashizawa, Tokyo (JP); and Kota Terayama, Kanagawa (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Sep. 8, 2022, as Appl. No. 17/940,076.
Claims priority of application No. 2021-148905 (JP), filed on Sep. 13, 2021.
Prior Publication US 2023/0077931 A1, Mar. 16, 2023
Int. Cl. H04N 23/73 (2023.01); G03F 7/20 (2006.01); H04N 23/72 (2023.01)
CPC H04N 23/73 (2023.01) [G03F 7/20 (2013.01); H04N 23/72 (2023.01)] 17 Claims
OG exemplary drawing
 
1. An image processing apparatus that composites a plurality of images that have been captured with different exposure amounts, the image processing apparatus comprising at least one processor and/or circuit configured to function as following units:
a specification unit configured to specify a signal value indicating an upper limit value of an output dynamic range with respect to at least one of the plurality of images; and
a decision unit configured to decide on composition percentages of the plurality of images based on the signal value specified by the specification unit, wherein
the specification unit specifies the signal value indicating the upper limit value of the output dynamic range with respect to each of the plurality of images, and
the decision unit corrects the signal values indicating the upper limit values of the output dynamic ranges of the respective plurality of images based on exposure amounts of the plurality of images, and decides on the composition percentages of the plurality of images based on the corrected signal values indicating the upper limit values of the output dynamic ranges of the plurality of images,
wherein the at least one processor and/or circuit further configured to function as a unit configured to obtain a base Mix table that, with respect to a signal range in which the plurality of images are composited, defines a signal threshold that is used as a base in switching tendencies of the composition percentages of the respective plurality of images,
wherein the decision unit configures a changed Mix table by changing the signal threshold of the base Mix table based on the corrected signal values indicating the upper limit values of the output dynamic ranges of the plurality of images, and decides on the composition percentages based on the changed Mix table.