Patent ID: 8643792

Claim:
A method of reducing progressive distortion in a projected image in a projection imaging system having a warping map, said method comprising: periodically displaying a reference image pattern on a viewing screen in a rear projection imaging system by transmitting to a microdisplay pre-warped input video signals corresponding to the reference image pattern modified by the warping map; operating the microdisplay to accept the input video signals to output a visual image to projection optics, including a visual image of the pre-warped reference image pattern; transmitting the visual image through the projection optics to create a projected image corresponding to the pre-warped reference image pattern; capturing an image of the projected image and; comparing the reference image pattern with the captured image, and generating and saving a corrected warping map based on that comparison if the comparison exceeds a predetermined limit, and thereafter pre-warping image generation commands according to the corrected warping map so that the projected image is corrected for progressive distortions in the system.