Judgement method, judgement device, and judgement program

A judgement device, comprising:

• a judgement way determination section for selecting two or more living body judgement processes among a plurality of living body judgement processes for judging whether a subject contained in an image is of living body, and determining an order of executing the two or more selected living body judgement processes;
• an execution section for executing each of the two or more selected living body judgement processes in the determined order;
• an output section for showing, in each of the two or more selected living body judgement processes, a subject an action required for the living body judgement process;
• a facial image acquisition section for acquiring a facial image containing a face of the subject when acting in accordance with the shown action;
• and a first judgement section for judging whether the subject is of living body based on a feature of a section of the face contained in the facial image;
• and
• a second judgement section for determining whether judgement results obtained from the two or more selected living body judgement processes satisfy a predetermined condition, judging that the subject is of living body when the judgement results satisfy the predetermined condition, and judging that the subject is not of living body when the judgement results fail to satisfy the predetermined condition,
• wherein, prior to the selection of two or more living body judgment processes from among the plurality of living body judgement processes, a state of the subject is detected by the judgement way determination section, and
• the selection of two or more living body judgment processes by the judgement way determination section includes eliminating any living body judgement process that includes an action unsuitable for judging whether the subject contained in the image is of living body based on the detected state of the subject.

A non-transitory computer-readable recording medium storing a judgement program causing a computer to function as a judgement device, the judgement program causing the computer to function as:

• a judgement way determination section for selecting two or more living body judgement processes among a plurality of living body judgement processes for judging whether a subject contained in an image is of living body, and determining an order of executing the two or more selected living body judgement processes;
• an execution section for executing each of the two or more selected living body judgement processes in the determined order;
• an output section for showing, in each of the two or more selected living body judgement processes, a subject an action required for the living body judgement process;
• a facial image acquisition section for acquiring a facial image containing a face of the subject when acting in accordance with the shown action;
• and a first judgement section for judging whether the subject is of living body based on a feature of a section of the face contained in the facial image;
• and
• a second judgement section for determining whether judgement results obtained from the two or more selected living body judgement processes satisfy a predetermined condition, judging that the subject is of living body when the judgement results satisfy the predetermined condition, and judging that the subject is not of living body when the judgement results fail to satisfy the predetermined condition,
• wherein, prior to the selection of two or more living body judgment processes from among the plurality of living body judgement processes, a state of the subject is detected by the judgement way determination section, and
• the selection of two or more living body judgment processes by the judgement way determination section includes eliminating any living body judgement process that includes an action unsuitable for judging whether the subject contained in the image is of living body based on the detected state of the subject.