Analysis of color error diffusion with vector error filters

Zhigang Fan

doi:10.1117/12.646380

16 January 2006 Analysis of color error diffusion with vector error filters

Zhigang Fan

Proceedings Volume 6058, Color Imaging XI: Processing, Hardcopy, and Applications; 60580Y (2006) https://doi.org/10.1117/12.646380
Event: Electronic Imaging 2006, 2006, San Jose, California, United States

Abstract

As vector error filters are capable of passing errors generated in one color component to other color components, it provides more flexibility in shaping the halftone texture. As a result, it may potentially produce halftones with better image quality. In this paper, we analyze color error diffusion with vector error filters. In particular, we will discuss its halftone spectrum features and its stability conditions with respect to the filter coefficients. For spectrum analysis, we will derive the high-pass and average color preservation conditions, which ensure decent image quality. Since error diffusion is a feedback system, the vector error filters may cause instability, if it is not properly designed. This may potentially generate ever-increasing quantization error that masks the input and produces unacceptable output images. The stability conditions we will discuss provide guidelines for designing stable systems.

Citation Download Citation

Zhigang Fan "Analysis of color error diffusion with vector error filters", Proc. SPIE 6058, Color Imaging XI: Processing, Hardcopy, and Applications, 60580Y (16 January 2006); https://doi.org/10.1117/12.646380

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KEYWORDS

Diffusion

Error analysis

Optical filters

Quantization

Halftones

Image quality

Spectrum analysis

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