Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1995-07-18
1998-05-05
Hjerpe, Richard
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345136, 345137, 345509, 395109, G09G 536
Patent
active
057481784
ABSTRACT:
Video system and methods are described for improved image processing (e.g., anti-aliasing) of digital images. The video system includes a shift register component interposed (operably) between video memory and video digital-to-analog components. In this fashion, the shift register stores, at any given time, a collection of pixel values which have been scanned (read) out of the video memory. The shift register is adapted so that a neighborhood of pixel values is available at a given instance for a current pixel from the image stored in the video memory. Selected cells of the shift register are adapted to include "taps" which form connections between those cells and the input to a multiplier/adder circuit. Once a given neighborhood of pixel values is supplied to the multiplier/adder circuit, the system may compute a new (i.e., enhanced) pixel value by applying a filter template--a collection of filter weightings or coefficients. This is done for each pixel in the image (or image pair) in parallel with the scan out of video memory.
REFERENCES:
patent: 5005011 (1991-04-01), Perlman et al.
patent: 5014129 (1991-05-01), Imanishi
patent: 5264838 (1993-11-01), Johnson et al.
patent: 5596684 (1997-01-01), Ogletree et al.
Chang Kent
Hjerpe Richard
Smart John A.
Sybase Inc.
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