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Number of results

Journal

2009 | 7 | 3 | 444-456

Article title

Bayes-optimal solution to inverse halftoning based on statistical mechanics of the Q-Ising model

Content

Title variants

Languages of publication

EN

Abstracts

EN
On the basis of statistical mechanics of the Q-Ising model, we formulate the Bayesian inference to the problem of inverse halftoning, which is the inverse process of representing gray-scales in images by means of black and white dots. Using Monte Carlo simulations, we investigate statistical properties of the inverse process, especially, we reveal the condition of the Bayes-optimal solution for which the mean-square error takes its minimum. The numerical result is qualitatively confirmed by analysis of the infinite-range model. As demonstrations of our approach, we apply the method to retrieve a grayscale image, such as standard image Lena, from the halftoned version. We find that the Bayes-optimal solution gives a fine restored grayscale image which is very close to the original. In addition, based on statistical mechanics of the Q-Ising model, we are sucessful in constructing a practically useful method of inverse halftoning using the Bethe approximation.

Publisher

Journal

Year

Volume

7

Issue

3

Pages

444-456

Physical description

Dates

published
1 - 9 - 2009
online
25 - 6 - 2009

Contributors

author
  • Department of Electrical and Computer Engineering, Wakayama National College of Technology, 77 Noshima, Nada, Gobo, Wakayama, 644-0023, Japan
  • Complex Systems Engineering, Graduate School of Information Science and Technology, Hokkaido University, N14-W9, Kita-ku, Sapporo, 060-0814, Japan
  • Division of Transdisciplinary Science, Graduate School of Frontier Science, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba, 277-8561, Japan
author
  • Division of Transdisciplinary Science, Graduate School of Frontier Science, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba, 277-8561, Japan

References

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Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.-psjd-doi-10_2478_s11534-009-0066-0
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