INCORPORATION BY REFERENCE

This application is based upon and claims the benefit of priority from Japanese patent application No. 2018-227464, filed on Dec. 4, 2018, the disclosure of which is incorporated herein in its entirety by reference.

TECHNICAL FIELD

The present disclosure relates to an information processing system, a method for managing an object to be authenticated, and a program.

BACKGROUND ART

In recent years, various systems using face authentication have been developed and they have been used in various ways. In a face authentication system, it is necessary to register face information of persons to be authenticated in advance in order to perform face authentication. In face authentication for identifying a person, a face image registered as an object to be authenticated is often registered on an individual basis. However, for example, in a stamp rally game in which a rule is defined such that a stamp is given to a group on the condition that all the members of that group have arrived at a predetermined point together, when the arrivals of participants are determined by face authentication, it is necessary to register face images on a group basis in advance.

As a technique related to such a circumstance, there is an authentication apparatus disclosed in Japanese Patent No. 5783009. In this authentication apparatus, a plurality of faces detected from an image are registered in association with each other.

However, when faces of persons to be authenticated are photographed outdoors or in a place where there are a large number of people, and a plurality of faces are simultaneously detected from the taken image and their face information is registered, there is a possibility that faces of persons other than those to be authenticated may also be in the taken image and hence their faces may be mistakenly associated with the faces of those to be authenticated. In such a case, it is necessary to change the shooting place and/or take face images again, thus making the registration time-consuming.

Further, as a related technique, there is an image information processing apparatus disclosed in International Patent Publication No. WO2011/148562. This image information processing apparatus forms a group that includes only some of a plurality of persons shown in the image based on the directions in which persons in the image are facing.

SUMMARY

In the apparatus described in Japanese Patent No. 5783009 or International Patent Publication No. WO2011/148562, it is impossible to efficiently register a group to be authenticated in face authentication in the system. One of the objects to be attained by example embodiments disclosed in this specification is to provide an information processing system, a method for managing an object to be authenticated, and a program capable of efficiently registering a group to be authenticated in face authentication in the system.

An information processing system according to a first aspect includes:

a face detection unit configured to detect a face from an image in which a plurality of faces of persons are shown;

a determination unit configured to determine whether or not the face detected by the face detection unit satisfies a predetermined condition; and

a registration information generation unit configured to generate registration information, the registration information being information in which a partial image of each of a plurality of faces that have been determined to satisfy the predetermined condition is associated with an identifier identifying a group to be authenticated in face authentication.

A method for managing an object to be authenticated according to a second aspect includes:

detecting a face from an image in which a plurality of faces of persons are shown;

determining whether or not the detected face satisfies a predetermined condition; and

generating registration information, the registration information being information in which a partial image of each of a plurality of faces that have been determined to satisfy the predetermined condition is associated with an identifier identifying a group to be authenticated in face authentication.

A program according to a third aspect causes a computer to execute:

a face detection step of detecting a face from an image in which a plurality of faces of persons are shown;

a determination step of determining whether or not the detected face satisfies a predetermined condition; and

a registration information generation step of generating registration information, the registration information being information in which a partial image of each of a plurality of faces that have been determined to satisfy the predetermined condition is associated with an identifier identifying a group to be authenticated in face authentication.

