Computer graphics processing and selective visual display system – Display driving control circuitry – Adjusting display pixel size or pixels per given area
Reexamination Certificate
2007-01-02
2007-01-02
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, C348S445000
Reexamination Certificate
active
10388245
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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Brunner Ralph T.
Fleming Charles G.
Apple Computer Inc.
Lay Michelle K.
Tung Kee M.
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