Image display for dither halftoning

Details Image display for dither halftoning Image display for dither halftoning

1997-05-12

2000-07-04

Hjerpe, Richard A.

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345149, 358455, G09G 336

Patent

active

060845600

ABSTRACT:
Disclosed is an image display apparatus for dither halftoning a video signal that enters from an external unit and displaying the resulting video signal on a display unit. A dither table, which comprises an array of dither threshold values used by a dither halftoning circuit, is changed based upon the capability of the display unit to display halftone display colors and/or data relating to the number of display colors contained in the video signal. In order to select threshold values, an output value of the dither halftoning circuit, which is at an identical display position in the immediately preceding frame of the video signals is referenced.

REFERENCES:
patent: 3967052 (1976-06-01), Judice
patent: 4377821 (1983-03-01), Sautter et al.
patent: 4987484 (1991-01-01), Ikeda et al.
patent: 5353041 (1994-10-01), Miyamoto et al.
patent: 5420603 (1995-05-01), Tsuboyama et al.

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