An image capture device (1) includes: a storage unit (19) that stores a plurality of discriminators corresponding to a plurality of photographing environment types, respectively; an acquisition unit (42) that sequentially acquires images; a selection unit (41) that selects a specific discriminator from among a plurality of discriminators that corresponds to the plurality of photographing environments, respectively; and a detection unit (43) that detects an image of a subject in images sequentially acquired by the acquisition unit.