Digital image signal processing

Details Digital image signal processing Digital image signal processing

1994-11-14

1999-06-08

Wu, Xiao

Computer graphics processing and selective visual display system

Display peripheral interface input device

Light pen for fluid matrix display panel

345507, G09G 500

Patent

active

059107952

ABSTRACT:
A raster scanned image may be scaled up or down for display on e.g. a portion of a computer display. This is achieved by dividing the image into a plurality of image cells each with a horizontal width less than that of the whole image. A smoothing algorithm is then applied to the lines of each cell in turn to generate new pixel data in dependence on the scaling operation to be performed. The scaling means stores a number of lines of data from a cell the number being dependent on the particular smoothing algorithm being used. To facilitate scanning of the image cell structure additional sync pulses are generated. These are cell horizontal and cell vertical sync pulses.

REFERENCES:
patent: 5148523 (1992-09-01), Harlin et al.
patent: 5200738 (1993-04-01), Fumoto et al.

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