US 12,217,401 B2
Image processing apparatus, image processing method, and storage medium
Atsushi Iwashita, Tokyo (JP); Kosuke Terui, Kanagawa (JP); Ryuichi Fujimoto, Tokyo (JP); and Sota Torii, Tokyo (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jul. 20, 2022, as Appl. No. 17/868,942.
Application 17/868,942 is a continuation of application No. PCT/JP2021/004897, filed on Feb. 10, 2021.
Claims priority of application No. 2020-020889 (JP), filed on Feb. 10, 2020; and application No. 2020-020892 (JP), filed on Feb. 10, 2020.
Prior Publication US 2022/0366543 A1, Nov. 17, 2022
Int. Cl. G06K 9/00 (2022.01); G06T 5/20 (2006.01); G06T 5/50 (2006.01); G06T 5/70 (2024.01)
CPC G06T 5/70 (2024.01) [G06T 5/20 (2013.01); G06T 5/50 (2013.01); G06T 2207/10116 (2013.01); G06T 2207/20192 (2013.01); G06T 2207/20224 (2013.01); G06T 2207/30008 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An image processing apparatus comprising:
a first processing unit configured to perform first noise reduction processing on a plurality of radiation images corresponding to mutually-different radiation energies;
a generating unit configured to generate a decomposition image by energy subtraction processing using the plurality of radiation images obtained by performing the first noise reduction processing; and
a second processing unit configured to perform second noise reduction processing on the decomposition image, the second noise reduction processing using a filter that differs from a filter used in the first noise reduction processing in at least one of size and type.