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From softcopy to hardcopy on a desert island
Author(s) -
Brill Michael H.,
Panken Neal
Publication year - 1988
Publication title -
color research and application
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.393
H-Index - 62
eISSN - 1520-6378
pISSN - 0361-2317
DOI - 10.1002/col.5080130212
Subject(s) - cyan , halftone , magenta , computer science , rgb color model , computer graphics (images) , gamut , set (abstract data type) , artificial intelligence , image (mathematics) , inkwell , optics , physics , speech recognition , programming language
A computer program is written that converts from a digital color image (driving the phosphors of a softcopy video display) to the areal dye densities for a halftone hardcopy device. The program is intended to be generic enough for acceptable color reproduction between a variety of devices without slavish attention to such factors as the phosphor and dye spectra. Only one parameter called “subtractiveness” is empirically adjustable depending on how much image darkening must be compensated. No particular theory is invoked, but the transformation between RGB inputs and CMY outputs is constrained to ensure (1) symmetry among the image planes; (2) no higher than third‐degree polynomials; and (3) nominal correspondence of the eight extremal colors red, green, blue, cyan, magenta, yellow, white, and black. When tested on one set of devices, the program works well enough for the “desert islands” inhabited by most users.