Rear Projection Imaging System with Image Warping Distortion Correction System and Associated Method

摘要

A rear projection imaging system with an image warping distortion correction system using a camera and processing unit to generate a warping map that corrects for image distortion. The warping map is generated in an iterative process by displaying a known pattern on a viewing screen and, through the use of a camera, having a microprocessor determine the location and shape of the pattern on the screen. The microprocessor then compares the displayed image to the original reference image, calculates the distortion effects present in the projection optics, and generates a warping map.

主权项

1. A method of operating a projection imaging system comprising a microdisplay, projection optics and a viewing screen having multiple optical surfaces, 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; operating the microdisplay to accept the image generation commands output an image to the projection optics, including an image of the reference image; transmitting the image through the projection optics, including the image of the reference image, to an image plane to create a projected image corresponding to the reference image; capturing an image of the projected image from an intermediate optical surface and; comparing the reference image 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.