Image processing apparatus, image processing method, and non-transitory computer-readable storage medium

An image processing method performed by an image processing apparatus, the method comprising:

• detecting subjects from a frame;
• and
• if no subject having same identification information as identification information of a tracking target subject is detected from a first frame, and identification information of subjects detected from the first frame includes new identification information different from identification information of subjects detected from a second frame, which is a frame before a timing at which the tracking target subject is no longer detected, updating the identification information of the tracking target subject to the new identification information.

A non-transitory computer-readable storage medium storing a computer program that causes a computer to execute the instructions to:

• detect subjects from a frame;
• and
• if no subject having same identification information as identification information of a tracking target subject is detected from a first frame, and identification information of subjects detected from the first frame includes new identification information different from identification information of subjects detected from a second frame, which is a frame before a timing at which the tracking target subject is no longer detected, update the identification information of the tracking target subject to the new identification information.