Patent ID: 7119833

Claim:
A method for automatically correcting distortion of a front-projected display under observation by a camera, the method comprising the steps of: observing a first image, projected from at least one projector, comprising at least one target distribution of light intensities; for each conglomeration of white pixels of a difference image, compute a bounding box comprising a corresponding conglomeration of pixels in a framebuffer information of the camera, compute a bounding box comprising a corresponding conglomeration of pixels in a framebuffer information of said projector, compute an initial homography matrix, H temp , mapping pixels of said projector's bounding box to those of the camera's bounding box, optimize said initial homography matrix, compute a central location, (C x , C y ), of the camera's bounding box using said initial homography matrix; and using a plurality of correspondence values comprising said correspondence, compute a corrective transform to aid in the automatic correcting of the display.