Patent ID: 7164428

Claim:
An image display system comprising: image display means for projecting four calibration images including red, green, blue and white colors each having a given grayscale value onto a display area viewing environment detection means for detecting color information of the projected four calibration images on a display area under viewing environment, color gamut computation means for computing a present environment color gamut capable of being displayed by the image display means under the viewing environment, and for computing a ratio of an area of the present environment color gamut to an area of an ideal environment color gamut capable of being displayed by the image display means under a predetermined viewing environment, color correcting means for correcting image information representing an image to correct the color of the image on the basis of the color information; and brightness correction means for correcting grayscale characteristic information on the basis of the computed ratio to adjust the brightness of the image when the ratio is other than one, and for correcting the image information which has been corrected by the color correcting means on the basis of the grayscale characteristic information and the color information to correct the brightness of the image.