Facsimile and static presentation processing – Natural color facsimile
Patent
1991-09-20
1993-09-28
Brinich, Stephen
Facsimile and static presentation processing
Natural color facsimile
355 32, H04N 146
Patent
active
052490424
ABSTRACT:
Color video signals representing gradation values of yellow, magenta, cyan and black components of a halftone original are stored into respective video memories (4) and matrix patterns of screen values are stored in respective areas of a screen memory (7) corresponding to the colors of the video signals. Each matrix pattern has repeating areas extending in a direction inclined to the orientation of the original at an angle .phi. which satisfies tan .phi.=1/(tan .theta.+cot .theta.). Each of the color signals is retrieved from the video memories (4) at line intervals depending on the screen angle .theta. so that if the video signal is reconstructed on a hypothetical plane the line starting points of a resultant image would substantially delineate a line path that is inclined to the orientation of the original by an amount corresponding to the screen angle .theta. of the color of the video signal. The screen values of each matrix pattern are repeatedly retrieved corresponding to the color of the video signal and compared with the retrieved video signal to produce print signals.
REFERENCES:
patent: 4970586 (1990-11-01), Sunda et al.
patent: 5055923 (1991-10-01), Kitagawa et al.
Ishihara Miki
Kaji Mitsuo
Brinich Stephen
NEC Corporation
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