IMAGE GENERATION DEVICE AND IMAGE GENERATION METHOD

An image generation device includes an image capturing unit installed on a water moving object, a target information acquisition unit which acquires target information about a target, an augmented image generation unit which generates an augmented image in which the target information acquired by the target information acquisition unit is displayed in a captured image captured by the image capturing unit, a marker display unit which displays a marker for selecting the target by a user such that the marker moves according to a display place of the target in the augmented image, and a marker moving unit moves the display place of at least one of a plurality of the markers so that determination regions which determining that each marker has been selected do not overlap each other.