Halftoning for color-indexed displays

Breaux, Nancy A.; Chu, Chee‐Hung Henry

doi:10.1109/icip.1999.817185

Cited by 2 publications

References 5 publications

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A multiscale color error diffusion algorithm for color quantization

Fung

Chan

2005

2005 International Symposium on Intelligent Signal Processing and Communication Systems

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This paper presents a new multiscale vector error diffusion algorithm for color quantization. This iterative algorithm selects a pixel, color-quantizes it and then diffuses the quantization error with a non-causal filter at each iteration until all pixels are color-quantized. By doing so, directional hysteresis is completely eliminated and color impulses can be reduced to a certain extent. Simulation results show that it provides better outputs in terms of S-CIELAB color difference metric as compared with conventional approaches. The subjective quality of the output is also improved.

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A multiscale color error diffusion algorithm for color quantization

Fung

Chan

2005

2005 International Symposium on Intelligent Signal Processing and Communication Systems

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A Technique for Producing Scalable Color-Quantized Images With Error Diffusion

Fung

Chan

2006

IEEE Trans. on Image Process.

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Abstract-To reliably and efficiently deliver media information to diverse clients over heterogeneous networks, the media involved must be scalable. In this paper, a color quantization algorithm for generating scalable colorindexed images is proposed based on a multiscale error diffusion framework. Images of lower resolutions are embedded in the outputs such that a simple down-sampling process can extract images of any desirable resolutions. Images possessing this scalable property support transmission over the Internet which contains clients with different display resolutions, systems with different caching resources and networks with varying bandwidths and QoS capabilities. Unlike most of the color halftoning algorithms available nowadays, the proposed algorithm is not dedicated for printing applications but for color-indexed displays. It works with any arbitrary palettes of different size.Index Terms-Color index, color quantization, directional hysteresis, error diffusion, halftoning, multiscale processing, scalable media.

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Halftoning for color-indexed displays

Cited by 2 publications

References 5 publications

A multiscale color error diffusion algorithm for color quantization

A multiscale color error diffusion algorithm for color quantization

A Technique for Producing Scalable Color-Quantized Images With Error Diffusion

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