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Proceedings Paper

Wavelets as a tool for the construction of a halftone screen
Author(s): Theophano Mitsa; Paul Brathwaite
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Paper Abstract

Halftoning using a mask presents the advantage of computational simplicity and implementation speed. Blue-noise masks in particular have the additional advantage of producing visually pleasing halftones without periodic artifacts. However, halftones produced with a blue-noise mask are usually grainy and less sharp compared with error diffusion images. In this paper, we present an algorithm for the construction of a 'max-energy' mask that reduces the perceived graininess in the output halftone by controlling the local spectral energy in the dot profiles of the mask, i.e., the binary patterns that results after the mask is thresholded at a constant gray level. Dot profiles of the max-energy mask are shown and an example halftone is compared against a blue-noise mask halftone.

Paper Details

Date Published: 20 April 1995
PDF: 11 pages
Proc. SPIE 2411, Human Vision, Visual Processing, and Digital Display VI, (20 April 1995); doi: 10.1117/12.207541
Show Author Affiliations
Theophano Mitsa, Univ. of Iowa (United States)
Paul Brathwaite, Univ. of Iowa (United States)

Published in SPIE Proceedings Vol. 2411:
Human Vision, Visual Processing, and Digital Display VI
Bernice E. Rogowitz; Jan P. Allebach, Editor(s)

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