1. An information processing apparatus comprising: circuitry configured to: acquire depth data including depth information associated with a plurality of pixels included in image data of a captured image; calculate a first depth having a local maximum frequency in a frequency distribution of the depth information, the frequency distribution of the depth information being generated based on the depth data; calculate a second depth of an object included in a predetermined region of the captured image; and determine whether the captured image is a target object image, a target of which is the object included in the predetermined region of the captured image, based on a difference in depths between the first depth and the second depth.