Patent ID: 7419268

Claim:
An image processing system comprising: an image projection means for projecting a single-color calibration image formed of an arbitrary single color onto a projection target when a calibration is performed, and projecting a multi-color calibration image onto the projection target when the calibration is performed, the multi-color calibration image including a first region and a second region, the first region being in a first single color and smaller than an entire image region and the second region being a region other than the first region and in a second single color, which is a color other than the first single color; a sensing means for sensing the single-color calibration image projected onto the projection target to generate first sensing information, and sensing the multi-color calibration image projected onto the projection target to generate second sensing information; a projection target region information generation means for generating projection target region information which indicates coordinates of four corners of the projection target in a sensing region of the sensing means based on a difference in image signal value between each pixel of a sensed image based on the first sensing information; a projection area information generation means for detecting the first region in the sensing region as a partial projection area based on a difference between the first sensing information and the second sensing information, and generating projection area information which indicates coordinates of four corners of a projection area in the sensing region based on the partial projection area; a correction information generation means for generating image distortion correction information based on the projection target region information and the projection area information; and a distortion correction means for correcting an image signal so that image distortion is corrected based on the image distortion correction information.