An information processing apparatus includes a memory storing a program, and one or more processors that, by executing the program, function as an obtaining unit configured to obtain information relating to a posture of an imaging device that is imaging a region of a subject, and a determination unit configured to perform a determination, based on the information relating to the posture, regarding which region of the subject corresponds to the region imaged by the imaging device. The determination unit performs the determination based on the information relating to the posture obtained at a timing when a posture of the imaging device satisfies a predetermined condition.