Authentication apparatus, authentication method, image capturing apparatus, method of controlling the same and storage medium

An authentication method comprising:

• detecting an object from an inputted image;
• collating the detected object with an authentication subject registered in advance, and outputting a collation score indicating a similarity degree between the object and the authentication subject;
• based on the collation score, updating an authentication score, which is an evaluation value that indicates a degree to which the object matches the authentication subject;
• and
• authenticating the object based on the authentication score,
• wherein, in the updating, a method of updating the authentication score is changed based on a magnitude relationship between the collation score and the authentication score.

An image capturing apparatus, comprising:

• at least one processor or circuit and a memory storing instructions to cause the at least one processor or circuit to perform operations of the following units:
• a detection unit configured to detect an object from a captured image;
• a collation unit configured to collate the object detected by the detection unit with an authentication subject registered in advance, and output a collation score indicating a similarity degree between the object and the authentication subject;
• an update unit configured to, based on the collation score, update an authentication score, which is an evaluation value that indicates a degree to which the object matches the authentication subject;
• and
• a determination unit configured to determine a main object based on the authentication score,
• wherein the update unit changes a method of updating the authentication score based on a magnitude relationship between the collation score and the authentication score.

A method of controlling an image capturing apparatus, the method comprising:

• detecting an object from a captured image;
• collating the detected object with an authentication subject registered in advance, and outputting a collation score indicating a similarity degree between the object and the authentication subject;
• based on the collation score, updating an authentication score, which is an evaluation value that indicates a degree to which the object matches the authentication subject;
• and
• determining a main object based on the authentication score,
• wherein, in the updating, a method of updating the authentication score is changed based on a magnitude relationship between the collation score and the authentication score.

A non-transitory computer readable storage medium storing a program for causing a computer to execute each step of an authentication method, the method comprising:

• detecting an object from an inputted image;
• collating the detected object with an authentication subject registered in advance, and outputting a collation score indicating a similarity degree between the object and the authentication subject;
• based on the collation score, updating an authentication score, which is an evaluation value that indicates a degree to which the object matches the authentication subject;
• and
• authenticating the object based on the authentication score,
• wherein, in the updating, a method of updating the authentication score is changed based on a magnitude relationship between the collation score and the authentication score.

A non-transitory computer readable storage medium storing a program for causing a computer to execute each step of a method of controlling an image capturing apparatus, the method comprising:

• detecting an object from a captured image;
• collating the detected object with an authentication subject registered in advance, and outputting a collation score indicating a similarity degree between the object and the authentication subject;
• based on the collation score, updating an authentication score, which is an evaluation value that indicates a degree to which the object matches the authentication subject;
• and
• determining a main object based on the authentication score,
• wherein, in the updating, a method of updating the authentication score is changed based on a magnitude relationship between the collation score and the authentication score.