	US 12,236,714 B2
	Information processing system, information processing apparatus, information processing method, and recording medium
Ryo Yamakabe, Tokyo (JP); Ryuichi Akashi, Tokyo (JP); Yuka Ogino, Tokyo (JP); Kosuke Yoshimi, Tokyo (JP); and Masato Tsukada, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/776,314
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Sep. 14, 2021, PCT No. PCT/JP2021/033693 § 371(c)(1), (2) Date May 12, 2022, PCT Pub. No. WO2023/042248, PCT Pub. Date Mar. 23, 2023.
Prior Publication US 2024/0153310 A1, May 9, 2024
Int. Cl. G06V 40/18 (2022.01); G06V 10/25 (2022.01); G06V 10/74 (2022.01); H04N 23/67 (2023.01)

CPC G06V 40/193 (2022.01) [G06V 10/25 (2022.01); G06V 10/761 (2022.01); H04N 23/67 (2023.01)]

6 Claims

1. An information processing system comprising:

at least one memory storing instructions; and

at least one processor configured to execute the instructions to:

specify an iris area containing an iris of a target from a visible-light image of the target, and acquire an iris distance that is a distance to the iris area;

acquire an iris image of the target by changing a focal length according to the iris distance;

calculate a score relating to a deviation of a focus in the iris image, based on the iris image; and

update a correlation between the iris distance and the focal length at a time of acquisition of the iris image, based on a depth of field required for iris authentication using the iris image.