Color printing yielding a dense black image

Details Color printing yielding a dense black image Color printing yielding a dense black image

1991-09-16

1993-08-31

Fuller, Benjamin R.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358529, 358515, H04N 1387, H04N 121, G03F 308

Patent

active

052413969

ABSTRACT:
A dense black image is formed by printing the black ink in combination with at least one other ink without resulting in thick, blurred figure edges. A bitmap of binary information is provided for each of a plurality of color separations, each bitmap indicating desired locations of ink spots for a color separation. Spots are eroded on the boundaries of black areas in the black bitmap to form a modified black bitmap. The modified black bitmap is printed in at least one color other than black at the same time that the bitmaps for the color separations other than black are printed. The black bitmap is then printed in black over the printed modified black bitmap to yield a dense black image.

REFERENCES:
patent: 4700399 (1987-10-01), Yoshida
patent: 4953015 (1990-08-01), Hayasaki et al.
patent: 5047844 (1991-09-01), Ikeda et al.
patent: 5079624 (1992-01-01), Sasuga
patent: 5119187 (1992-06-01), Ikeda et al.
patent: 5142355 (1992-08-01), Fujima

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