Search system, search method, and program recording medium

A search method performed by a computer, the search method comprising:

• detecting a face from at least one piece of image data being a selection target stored in a database;
• evaluating, when a target image indicating a search target person and an auxiliary image group including at least one auxiliary image that assists a search for the search target person are designated, whether a face detected from the image data being the selection target is included in the target image and the auxiliary image group;
• determining whether the search target person is captured in the image data, by using an evaluation result;
• and
• acquiring, from the database, the image data determined that the search target person is captured, based on a determination result;
• calculating a similarity degree between a face detected from the image data and a face of a person included in the target image and the auxiliary image group;
• acquiring metadata of the image data being the selection target from the database;
• determining whether the search target person is captured in the image data, based on the acquired metadata of the image data being the selection target and the similarity degree calculated for the target image and the auxiliary image group;
• and
• outputting a search result including the acquired image data.

A non-transitory program recording medium that records a program causing a computer to perform:

• processing of detecting a face from at least one piece of image data being a selection target stored in a database;
• processing of evaluating, when a target image indicating a search target person and an auxiliary image group including at least one auxiliary image that assists a search for the search target person are designated, whether a face detected from the image data being the selection target is included in the target image and the auxiliary image group;
• processing of determining whether the search target person is captured in the image data, by using an evaluation result;
• and
• processing of acquiring, from the database, the image data determined that the search target person is captured, based on a determination result;
• processing of calculating a similarity degree between a face detected from the image data and a face of a person included in the target image and the auxiliary image group;
• processing of acquiring metadata of the image data being the selection target from the database;
• processing of determining whether the search target person is captured in the image data, based on the acquired metadata of the image data being the selection target and the similarity degree calculated for the target image and the auxiliary image group;
• and
• processing of outputting a search result including the acquired image data.