Luma-based directional copy interpolation for color bilevel AM halftoning for printing

LETTER

Hisakazu Kikuchi, Akira Iijima, Shogo Muramatsu, Shigenobu Sasaki

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Keywords: interpolation, halftoning, AM halftoning, printing

JOURNAL FREE ACCESS

2008 Volume 5 Issue 5 Pages 170-175

DOI https://doi.org/10.1587/elex.5.170

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Abstract

The interpolation of color pixel values prior to digital halftoning is discussed and a new color interpolation scheme is presented by a directional copy of color values in the gradient field of luma. Error diffusion quantization is combined with clustered-dot ordered dithering to prevent from contouring. Experimental results demonstrate that sharp and false color-free interpolation is obtained to produce color bilevel AM halftones with weak rosettes and no contouring artifacts.

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