Method and apparatus for nonlinear anamorphic scaling of...

Details Method and apparatus for nonlinear anamorphic scaling of... Method and apparatus for nonlinear anamorphic scaling of...

2006-12-05

2008-08-26

Tung, Kee M. (Department: 2628)

Computer graphics processing and selective visual display system

Display driving control circuitry

Adjusting display pixel size or pixels per given area

C345S660000, C345S699000

Reexamination Certificate

active

07417649

ABSTRACT:
Methods and apparatuses for nonlinear scaling of video images. To match the aspect ratios of a video image and the target display area, at least one embodiment of the present invention scales the video image according to one or more nonlinear functions along the horizontal direction and/or the vertical direction. In one embodiment, the nonlinear functions are such that the original aspect ratio of the video image is preserved near the center region (or strip) of the image and the image is gradually stretched (or compressed) as it is mapped to the edges. In one example, the scaling is implemented by the texture mapping functionality of OpenGL using graphics hardware. In one embodiment of the present invention, the nonlinear mapping is constructed according to a polynomial mapping; and, the coefficients of the polynomial are adjustable by a user to trade off distortion between the image center and the image edges, giving the user control over the location and the amount of distortion.

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