The present invention provides, for example, an image correction device which corrects a projection image in consideration of the brightness of a projected portion relative to the periphery, and improves the realness of texture and color of the projected portion. The image correction device includes: a projection result estimation unit for, on the premise that a projected portion corresponds to a range in which a projector projects an image onto an object to be projected, an imaging portion corresponds to a range captured by a camera, the imaging portion is larger than the projected portion, and the imaging portion includes the projected portion, estimating an image to be obtained when a projection image is projected onto the object to be projected, thereby obtaining a projection result estimated image; a perceptual distance calculation unit for calculating a perceptual distance, which is a perceptual difference in intra-brain representation between a target image and the projection result estimated image; and a projection image update unit for updating the projection image so that the perceptual distance is reduced, thereby obtaining an updated projection image. In this image correction device, the projection result estimated image and the target image are images of the same size as the imaging portion.