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Proceedings Paper

Resolution-dependence of perceived contrast of textures
Author(s): Raphael L. Levien
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Paper Abstract

Spurred by technological improvements, displays (as well as printers) are increasingly available in a wide range of resolutions. Increased resolution improves perceptual quality in at least two different ways: reducing the perceived contrast of undesirable artifacts (such as halftoning or dithering textures), and increasing the perceived contrast of desirable image features (particularly when rendering text and high precision graphics). Much of the past literature addresses questions of how to optimize one or both of these for a given resolution, but there is little guidance on tradeoffs when the resolution itself is variable. In this paper, we present an analytic framework for quantifying how the perceived visual contrast of textures changes with resolution, and a simple, tractable model that accurately predicts visual contrast of grayscale-rendered text at different resolutions. These contrast metrics provide a solid basis for evaluating the effectiveness of grid-fitting and similar techniques for perceptually tuned grayscale font rendering, and can also be a useful tool for evaluating engineering tradeoffs such as choosing an optimum resolution relative to cost, speed, or bandwidth constraints.

Paper Details

Date Published: 18 December 2003
PDF: 8 pages
Proc. SPIE 5293, Color Imaging IX: Processing, Hardcopy, and Applications, (18 December 2003); doi: 10.1117/12.538846
Show Author Affiliations
Raphael L. Levien, artofcode LLC (United States)

Published in SPIE Proceedings Vol. 5293:
Color Imaging IX: Processing, Hardcopy, and Applications
Reiner Eschbach; Gabriel G. Marcu, Editor(s)

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