Cascaded anti-aliasing filter control for sampled images

Details Cascaded anti-aliasing filter control for sampled images Cascaded anti-aliasing filter control for sampled images

1995-04-07

1997-12-09

Boudreau, Leo

Image analysis

Image enhancement or restoration

Image filter

382301, 382302, 382303, 348571, 348578, 348580, 348409, 358183, 371 221, 395164, G06K 940

Patent

active

056968493

ABSTRACT:
A cascaded anti-aliasing filter control circuit for sampled images has a plurality of video effects modules coupled in a chain,. each module performing a particular transform of a cascaded video effect. An input module has as inputs constants for the particular transform and a pixel address signal, and provides as outputs a new pixel address signal and a set of partial derivative signals. The new pixel address signal is input to a next module in the chain as the pixel address signal, and the set of partial derivative signals are input to a matrix multiplier. A set of partial derivative signals from the next module also are input to the matrix multiplier to produce an intermediate set of partial derivative signals. A last module has as inputs the new pixel addresses from a prior module and constants for a final one the particular transforms for the cascaded video effect, and provides as outputs a final set of partial derivative signals which are combined in an output matrix multiplier with the set of partial derivative signals from a prior matrix multiplier to produce an output set of partial derivative signals from which filter control signals are generated.

REFERENCES:
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patent: 5173948 (1992-12-01), Blackham et al.
patent: 5206729 (1993-04-01), Nakata et al.
patent: 5227863 (1993-07-01), Bilbrey et al.
patent: 5561723 (1996-10-01), DesJardins et al.

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