Patent ID: 7221792

Claim:
An image processing system comprising: image projection means for projecting an image onto a projection plane; a sensor which images a display region within the projection plane; storage means for storing ideal-environment-measurement data obtained by measuring the display region on which a plurality of calibration images are sequentially displayed under an ideal environment, each of the calibration images having a different color, the display region being measured for each of the calibration images through the sensor; light separating means for deriving output light data indicating output light outputted from the image projection means and ambient light data indicating ambient light under a viewing environment based on a difference between first viewing-environment-measurement data and second viewing-environment-measurement data, the first viewing-environment-measurement data being obtained by measuring the display region on which a first calibration image among the calibration images is displayed under the viewing environment through the sensor, the second viewing-environment-measurement data being obtained by measuring the display region on which a second calibration image among the calibration images is displayed under the viewing environment through the sensor, luminance represented by image signals of the second calibration image being different from luminance represented by image signals of the first calibration image; projection-plane-influence-degree estimating means for estimating an influence degree due to the projection plane based on the output light data and the ideal-environment-measurement data; sensing data generating means for generating viewing-environment-estimation data indicating an estimation value in a case of measuring the display region on which the calibration images are sequentially displayed under the viewing environment for each of the calibration images through the sensor, based on the influence degree, the ideal-environment-measurement data, and the ambient light data; and correcting means for updating a predetermined image correcting data based on the viewing-environment-estimation data, and also for correcting image information based on the updated image correcting data, so as to reproduce an ideal image appearance, wherein the image projection means projects an image onto the projection plane based on the image information corrected by the correcting means.