INFORMATION PROCESSING DEVICE, CONTROL METHOD FOR INFORMATION PROCESSING DEVICE, AND INFORMATION STORAGE MEDIUM

To provide an information processing device for enabling a user to relatively readily select their desired number of images from among a plurality of images, even in a case such as when the plurality of images are displayed close to one another on a display screen. A trajectory obtaining unit (72) obtains a trajectory of a position on the display screen, the position being designated by the user. A selection candidate image determination unit (74) determines images, among the plurality of images, that are surrounded by the trajectory obtained by the trajectory obtaining unit (72). A number of times the images determined by the selection candidate image determination unit (74) as being surrounded by the trajectory obtained by the trajectory obtaining unit (72) are surrounded by the trajectory is obtained. An image selection unit (78) selects the number of images, the number corresponding to the number of times obtained by a surrounding number of times obtaining unit (76), from among the images determined by the selection candidate image determination unit (74) as being surrounded by the trajectory obtained by the trajectory obtaining unit (72).