ApplicationNo. 10824654 filed on 04/15/2004
US Classes:353/69, DISTORTION COMPENSATION353/70, For projection axis inclined to screen348/746, Raster shape distortion353/94, PLURAL353/121METHODS
ExaminersPrimary: Perkey, W. B.
Assistant: Sever, Andrew
Attorney, Agent or Firm
Foreign Patent References
International ClassesG03B 21/14
AbstractA computer calculates the shape of a figure after transformation using an approximate expression previously set for correcting a projected image for distortion associated with the shape of a projection surface of a cylindrical screen (an equation representative of a parabola in this case), a variable for horizontal transformation and a variable for vertical transformation which are entered through a user interface for transforming the approximate expression, and/or a variety of parameters required for transformation of image and optical corrections such as the optical center, linearity, amplitude, and position. A projector scales up or down pixels to produce a transformed image from the calculated figure after transformation for projection onto the cylindrical screen.