1. An image correction device comprising: reference brightness correction parameter calculation unit configured to calculate, in a reference image in which a reference object moving in a space that is an image capturing target is captured, a reference brightness correction parameter based on brightness information relating to an area of the reference object and coordinate information specifying a position of the area, and correction unit configured to correct a captured image in which the space is captured and a correction-target object is captured, based on the reference brightness correction parameter.