US 12,250,446 B2
Image processing apparatus, image pickup apparatus, and image processing method for acquiring polarization information
Rie Ishimatsu, Tochigi (JP); and Tomohiko Ishibashi, Tochigi (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Nov. 28, 2022, as Appl. No. 18/059,183.
Claims priority of application No. 2021-195669 (JP), filed on Dec. 1, 2021.
Prior Publication US 2023/0171480 A1, Jun. 1, 2023
Int. Cl. H04N 23/60 (2023.01); G02B 5/30 (2006.01); H04N 23/12 (2023.01); H04N 23/55 (2023.01)
CPC H04N 23/60 (2023.01) [G02B 5/3083 (2013.01); H04N 23/12 (2023.01); H04N 23/55 (2023.01)] 18 Claims
OG exemplary drawing
 
1. An image processing apparatus comprising at least one processor, and a memory coupled to the at least one processor, the memory storing instructions that, when executed by the processor, perform operations as:
a first acquiring unit configured to acquire a first image generated by imaging an object via a polarizing element configured to polarize and transmit lights such that the lights have a plurality of polarization azimuths that are different from each other;
a second acquiring unit configured to acquire information on an imaging condition in the imaging for acquiring the first image;
a setting unit configured to acquire information on the plurality of polarization azimuths of the lights and to set corrected polarization azimuth information based on a) the information on the plurality of polarization azimuths of the lights, b) an incident angle characteristic of the polarizing element, and c) the information on the imaging condition; and
a third acquiring unit configured to acquire polarization information using the first image and the corrected polarization azimuth information.