Method of correcting color saturation in electronic image proces

Details Method of correcting color saturation in electronic image proces Method of correcting color saturation in electronic image proces

1987-08-14

1989-05-16

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 40, 358 75, G03F 308, H04N 146, H04N 964

Patent

active

048314340

ABSTRACT:
An improved method for correction of color saturation, in electronic image processing, automatically compensates for brightness changes resulting from contrast processing. The method is used with electronic image processing, in which a two-dimensional original image is electro-optically scanned along rows and columns for three primary colors, the resulting image signals are transformed into a luminance signal Y and two color-difference or chrominance signals C1, C2, and the luminance signal is modified by electronic contrast processing. The invention improves the basic image processing method by measuring the luminance signals Y.sub.1 and Y.sub.2 which occur, respectively, before and after contrast processing, and multiplying their quotient Y.sub.2 /Y.sub.1 by each of the two chrominance signals C1, C2. This compensates automatically for the increase in color saturation which accompanies a brightness reduction and for the decrease in color saturation which accompanies a brightness increase.

REFERENCES:
patent: 3835243 (1974-09-01), Nagaoka
patent: 4058828 (1977-11-01), Ladd
patent: 4499486 (1985-02-01), Favreau et al.
patent: 4661843 (1987-04-01), Sekizawa et al.
patent: 4706111 (1987-11-01), Abe et al.
patent: 4712132 (1987-12-01), Soca
patent: 4734763 (1988-03-01), Urabe et al.

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