Method and system of color halftone reproduction

Details Method and system of color halftone reproduction Method and system of color halftone reproduction

1994-09-16

1995-10-31

Wong, Peter S.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358533, 358534, 358536, H04N 140, H04N 146, H04N 152

Patent

active

054634717

ABSTRACT:
A method of color halftone reproduction with reduced moire patterns and simplified calculations of color densities is disclosed. The method entails dividing a reproduction surface into an array of abutting halftone cells having centers aligned at a screen angle, preferably 45.degree. , with halftone cells in adjacent rows. The halftone cells each cover an area of M abutting horizontal dots long by N abutting vertical dots wide. The various system colors are applied to the pels, as required, in color patterns centered within the halftone cells. The patterns overlap one another to adjust the hue of the reproduction at the halftone cell location to the desired hue. The method is usable with permanent reproductions, such as printed paper, or with transient reproductions, such as the image on a CRT screen.

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