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Multistate image restoration by transmission of bit-decomposed data

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Title: Multistate image restoration by transmission of bit-decomposed data
Authors: Tadaki, Takashi Browse this author
Inoue, Jun-ichi2 Browse this author →KAKEN DB
Authors(alt): 井上, 純一2
Issue Date: 4-Dec-2001
Publisher: American Physical Society
Journal Title: Physical Review E
Volume: 65
Issue: 1
Start Page: 016101
Publisher DOI: 10.1103/PhysRevE.65.016101
Abstract: We report on the restoration of gray-scale image when it is decomposed into a binary form before transmission. We assume that a gray-scale image expressed by a set of Q-Ising spins is first decomposed into an expression using Ising (binary) spins by means of the threshold division, namely, we produce (Q-1) binary Ising spins from a Q-Ising spin by the function F(σi-m)=1 if the input data σi∈{0,…,Q-1} is σi>~m and 0 otherwise, where m ∈{1,…,Q-1} is the threshold value. The effects of noise are different from the case where the raw Q-Ising values are sent. We investigate whether it is more effective to use the binary data for transmission, or to send the raw Q-Ising values. By using the mean-field model, we analyze the performance of our method quantitatively. In order to investigate what kind of original picture is efficiently restored by our method, the standard image in two dimensions is simulated by the mean-field annealing, and we compare the performance of our method with that using the Q-Ising form. We show that our method is more efficient than the one using the Q-Ising form when the original picture has large parts in which the nearest-neighboring pixels take close values.
Rights: Copyright © 2002 American Physical Society
Type: article
Appears in Collections:情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 井上 純一

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