Wavelets as a tool for the construction of a halftone screen

Theophano Mitsa; Paul Brathwaite

doi:10.1117/12.207541

20 April 1995 Wavelets as a tool for the construction of a halftone screen

Theophano Mitsa, Paul Brathwaite

Proceedings Volume 2411, Human Vision, Visual Processing, and Digital Display VI; (1995) https://doi.org/10.1117/12.207541
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1995, San Jose, CA, United States

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.

Citation Download Citation

Theophano Mitsa and Paul Brathwaite "Wavelets as a tool for the construction of a halftone screen", Proc. SPIE 2411, Human Vision, Visual Processing, and Digital Display VI, (20 April 1995); https://doi.org/10.1117/12.207541

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