Patent ID: 7661827

Claim:
An image processing system comprising: an image projection section which projects a first calibration image towards a projection target; a sensing section which senses the projected first calibration image at a low resolution which is less than or equal to a predetermined resolution, to generate first sensing information, and also senses the first calibration image at a high resolution which is greater than or equal to the low resolution, to generate third sensing information; and a projection-target area detection section which generates projection-target area information relating to a position of a projection-target area corresponding to the projection target in a sensing area of the sensing section, based on the first and third sensing information, wherein the projection-target area detection section comprises: an edge detection section which performs edge detection to generate first edge detection information, based on the first sensing information, and also performs edge detection to generate third edge detection information, based on the third sensing information; and a projection-target area information generation section which generates provisional detection information by provisionally detecting the projection-target area based on the first edge detection information, and also generates the projection-target area information based on the third edge detection information, wherein the edge detection section generates the third edge detection information by performing edge detection on a pixel group around a boundary line of the provisionally detected projection-target area, based on the provisional detection information.