US 12,033,433 B2
Iris recognition apparatus, iris recognition method, computer program and recording medium
Keiichi Chono, Tokyo (JP); Masato Tsukada, Tokyo (JP); Chisato Funayama, Tokyo (JP); Takahiro Toizumi, Tokyo (JP); Yuka Ogino, Tokyo (JP); Ryuichi Akashi, Tokyo (JP); and Ryo Yamakabe, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/621,760
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Jun. 25, 2019, PCT No. PCT/JP2019/025107
§ 371(c)(1), (2) Date Dec. 22, 2021,
PCT Pub. No. WO2020/261368, PCT Pub. Date Dec. 30, 2020.
Prior Publication US 2022/0270406 A1, Aug. 25, 2022
Int. Cl. G06V 40/19 (2022.01)
CPC G06V 40/19 (2022.01) 9 Claims
OG exemplary drawing
 
1. An iris recognition apparatus for performing recognition of a target based on an iris pattern of the target, comprising:
at least one memory configured to store instructions; and
at least one processor configured to execute the instructions to:
perform an imaging processing for sequentially outputting images while changing a focal position for capturing the images by a sequence of maintaining an applied voltage to a liquid lens for a predetermined time after at least one of increasing the applied voltage to the liquid lens and decreasing the applied voltage to the liquid lens, wherein the predetermined time is less than the time interval between each image captured within the sequence;
start a focusing determination for determining whether or not an image, among the sequentially output images, is a focused image before the imaging processing is completed; and
start a recognition determination of an iris by using the image determined to be the focused image;
stop the imaging processing on condition that it is determined that the image is the focused image in the focusing determination; and
not start the recognition determination of the iris until the image is determined to be the focused image.