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Proceedings Paper

ATD, appearance equivalence, and desktop publishing
Author(s): Edward M. Granger
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Paper Abstract

Companion papers show why the CIELab system of color coordinates is not optimal for use in desktop publishing (DTP) systems and how ATD remedies most of the problems of CIELab. Since DTP deals primarily with the reproduction of images, DTP applications do not need to model human vision. They need only reproduce accurately in the image the reflective properties of the original. The eye does the rest. Linear arithmetic is adequate for this task. An intermediate color space decouples scanner calibration from printer control, leading to a system that is nearly device independent. Plots of Munsell and other color grids show the intermediate space to be uniform. The uniformity of the intermediate space and the linearity of the model lead to accurate gamut compression and negligible transformation errors using integer arithmetic operations on the 8-bit quantities associated with inexpensive DTP equipment. The resulting images are substantially better than those produced by current DTP programs.

Paper Details

Date Published: 15 April 1994
PDF: 6 pages
Proc. SPIE 2170, Device-Independent Color Imaging, (15 April 1994); doi: 10.1117/12.173845
Show Author Affiliations
Edward M. Granger, Light Source Images, Inc. (United States)

Published in SPIE Proceedings Vol. 2170:
Device-Independent Color Imaging
Eric Walowit, Editor(s)

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