Non-linear pixel interpolator function for video and graphic pro

Details Non-linear pixel interpolator function for video and graphic pro Non-linear pixel interpolator function for video and graphic pro

1993-06-30

1995-11-21

Groody, James J.

Television

Image signal processing circuitry specific to television

Special effects

348581, 348458, H04N 974

Patent

active

054692229

ABSTRACT:
A method and pixel interpolation system for non-linear interpolation of images having a plurality of input pixels and pixel positions. According to a preferred embodiment of the invention, a plurality of pairs of input pixels and a sequence of corresponding interpolation weights are received with a one-dimensional interpolator. A plurality of sequential weighted sums of the pairs of input pixels are provided at a plurality of the pixel positions in accordance with the interpolation weights. The sequence of interpolation weights is provided, where differences between pairs of successive interpolation weights of the sequence of interpolation weights differ. The sequence of interpolation weights is applied to the one-dimensional interpolator. The present invention may be utilized, for example, for performing the operations of shifting two-dimensional video images where the shifting operations are performed with non-uniform scaling in at least one of the dimensions, and may also be used when shifting an image with non-uniform scaling by a fractional pixel distance.

REFERENCES:
patent: 4163249 (1979-07-01), Michael et al.
patent: 4240113 (1980-12-01), Michael et al.
patent: 4282546 (1981-08-01), Reitmeir
patent: 4402012 (1983-08-01), Knight
patent: 4916540 (1990-04-01), Kosaka
patent: 5148381 (1992-09-01), Sprague

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