An information processing apparatus includes an input unit, an attention object detection unit, and a calculation unit. The input unit is configured to input a plurality of temporally continuous images taken by an image pickup apparatus. The attention object detection unit is configured to detect an attention object as an attention target from a first image which is an image taken at a first time point out of the plurality of images input. The calculation unit is configured to compare the first image with one or more second images which are one or more images taken at a time point previous to the first time point, to calculate, as a second time point, a time point when the attention object appears in the continuous plurality of images.
Information processing apparatus, information processing method, program, and information processing system