Information processing system, information processing method, and recording medium

An information processing method executed by at least one computer, the information processing method comprising:

• acquiring a first image and a second image that are captured such that optical axes intersect at a predetermined point set at a rear side of a focus position when viewed from a camera that captures the iris image;
• determining whether or not a difference between a position of a target in the first image and a position of the target in the second image is in a predetermined range;
• and
• performing a control of capturing an iris image of the target in a case where the difference is in the predetermined range;
• performing a control of continuously capturing iris images of the target who approaches the camera that captures the iris image, after the difference becomes in the predetermined range;
• selecting at least one high-quality iris image from the continuously captured iris images;
• and perform iris authentication by using the selected iris image.

A non-transitory recording medium on which a computer program that allows at least one computer to execute an information processing method is recorded, the information processing method including:

• acquiring a first image and a second image that are captured such that optical axes intersect at a predetermined point set at a rear side of a focus position when viewed from a camera that captures the iris image;
• determining whether or not a difference between a position of a target in the first image and a position of the target in the second image is in a predetermined range;
• and
• performing a control of capturing an iris image of the target in a case where the difference is in the predetermined range;
• performing a control of continuously capturing iris images of the target who approaches the camera that captures the iris image, after the difference becomes in the predetermined range;
• selecting at least one high-quality iris image from the continuously captured iris images;
• and perform iris authentication by using the selected iris image.