Method for processing color-image signals from a three-color ori

Details Method for processing color-image signals from a three-color ori Method for processing color-image signals from a three-color ori

1994-07-26

1996-12-03

Vu, Kim

Facsimile and static presentation processing

Natural color facsimile

Color correction

358538, 358529, H04N 156

Patent

active

055813755

ABSTRACT:
A color-image processing method is provided in which a two-color image can be formed in accordance with three color-image signals obtained by scanning a color original without having a color shear. A designated color is selected. A pixel is determined as the designated color by comparing the color-image signal with a sum of another color-image signal and a correction value. The pixel is determined as black when the color of the pixel has not been determined as the designated color. The pixel is determined as white by comparing intensity of the three color-image signal with predetermined threshold values. A color of a focus pixel is corrected by comparing linear patterns of colors of four consecutively arranged pixels including the focus pixel with a plurality of reference color patterns.

REFERENCES:
patent: 5028991 (1991-07-01), Sekizawa et al.
patent: 5187521 (1993-02-01), Shimizu et al.
patent: 5343310 (1994-08-01), Tasaki et al.
patent: 5452018 (1995-09-01), Capitant et al.

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