Patent ID: 7352913

Claim:
A method for projecting an image onto a viewing surface, wherein the relative orientation of projection axis and the normal direction associated with the viewing surface is characterized by simultaneous presence of at least two of pan, tilt, and roll angles, said method comprising: (a) obtaining input image data; (b) obtaining the at least two of pan, tilt, and roll angles; (c) determining a distorted projected area on the viewing surface in the simultaneous presence of the at least two of pan, tilt, and roll angles, and determining a best viewable area that fits within said distorted projected area such that the best viewable area is optimized with respect to at least one of image area and image resolution, and such that the best viewable area corresponds to the projected image in the absence of the at least two of pan, tilt and roll angles; and (d) applying a geometric distortion correction transformation to the input image data to obtain a visually distortion free projected image fitting the best viewable area.