Patent ID: 8228445

Claim:
A method of operating a projection imaging system comprising a microdisplay, projection optics and a viewing screen having an inside surface and an outside surface, said method comprising: converting an input video signal to image generation commands and transmitting said image generation commands to the microdisplay, said image generation commands corresponding to a reference image pattern; operating the microdisplay to accept the image generation commands output a visual image to the projection optics, including a visual image of the reference image pattern; transmitting the visual image through the projection optics, including the visual image of the reference image pattern, to an image plane to create a projected image corresponding to the reference image pattern; capturing an image of the projected image from the inside surface of the viewing screen and; comparing the reference image pattern with the captured image, and generating a warping map based on that comparison, and thereafter pre-warping image generation commands according to the warping map so that the projected image is corrected for distortions in the system.