Wavelet-based approach to inverse halftoning

Zixiang Xiong; Michael T. Orchard; Kannan Ramchandran

doi:10.1117/12.271578

4 April 1997 Wavelet-based approach to inverse halftoning

Zixiang Xiong, Michael T. Orchard, Kannan Ramchandran

Proceedings Volume 3018, Color Imaging: Device-Independent Color, Color Hard Copy, and Graphic Arts II; (1997) https://doi.org/10.1117/12.271578
Event: Electronic Imaging '97, 1997, San Jose, CA, United States

Abstract

This paper introduces a new approach to inverse halftoning using nonorthogonal wavelets. The distinct features of this wavelet-based approach are: a) edge information in the highpass wavelet images of a halftone is extracted and used to assist inverse halftoning, b) cross-scale correlations in the multiscale wavelet decomposition are used for removing background halftoning noise while preserving important edges in the wavelet lowpass image, c) experiments show that our simple wavelet-based approach outperforms the best results obtained from inverse halftoning methods published in the literature, which are iterative in nature.

Citation Download Citation

Zixiang Xiong, Michael T. Orchard, and Kannan Ramchandran "Wavelet-based approach to inverse halftoning", Proc. SPIE 3018, Color Imaging: Device-Independent Color, Color Hard Copy, and Graphic Arts II, (4 April 1997); https://doi.org/10.1117/12.271578

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