1. An information processing device, comprising: a display control unit that is configured to display a plurality of selected image candidates on a display; a designated position obtaining unit that is configured to obtain a position designated by a user; a determination unit that is configured to determine whether or not the obtained position is included in a determination area for the selected image candidate; a designation unit that is configured to designate, when the obtained position is included in the determination area, a selected image candidate corresponding to the determination area as a selected image; and a determination area change unit that is configured to change, when any of the plurality of selected image candidates is designated as the selected image, a determination area for another selected image candidate among the plurality of selected image candidates, depending on a positional relationship between one of the another selected image candidate and a determination area for the another selected image candidate, and one of the selected image and a determination area for the selected image, wherein the determination area change unit comprises at least one of: a unit that is configured to deform the determination area for the another selected image candidate by extending the determination area for the another selected image candidate toward one of the selected image and the determination area for the selected image; and a unit that is configured to move the determination area for the another selected image candidate toward one of the selected image and the determination area for the selected image so that a distance between a center of the determination area for the another selected image candidate and a center of the one of the selected image and the determination area for the selected image decreases.