Situation identification method, situation identification device, and storage medium

A situation identification device comprising:

• a memory;
• and
• a processor coupled to the memory and configured to:
• acquire a plurality of images;
• identify, for each of the plurality of images, a first area including a bed area where a place to sleep appears in an image, and a second area where an area in a predetermined range around the place to sleep appears in the image;
• detect a state of a subject to be monitored for each of the plurality of images based on a result of detection of a head area indicating an area of a head of the subject to be monitored in the first area and a result of detection of a living object in the second area;
• when the state of the subject to be monitored changes from a first state to a second state, identify a situation of the subject to be monitored based on a combination of the first state and the second state;
• and
• output information that indicates the identified situation.

A non-transitory computer-readable recording medium storing a program that causes a processor included in a situation identification device to execute a process, the process comprising:

• acquiring a plurality of images;
• identifying, for each of the plurality of images, a first area including a bed area where a place to sleep appears in an image, and a second area where an area in a predetermined range around the bed appears in the image;
• detecting a state of a subject to be monitored for each of the plurality of images based on a result of detection of a head area indicating an area of a head of the subject to be monitored in the first area and a result of detection of a living object in the second area;
• when the state of the subject to be monitored changes from a first state to a second state, identifying a situation of the subject to be monitored based on a combination of the first state and the second state;
• and
• outputting information that indicates the identified situation.