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Journal of Electrical and Computer Engineering
Volume 2010, Article ID 318137, 8 pages
http://dx.doi.org/10.1155/2010/318137
Research Article

High-Performance Region-of-Interest Image Error Concealment with Hiding Technique

1Department of Electronics Engineering, National Kaohsiung First University of Science and Technology, Kaohsiung 824, Taiwan
2Department of Computer and Communication Engineering, National Kaohsiung First University of Science and Technology, Kaohsiung 824, Taiwan

Received 5 March 2009; Revised 14 October 2009; Accepted 4 November 2009

Academic Editor: Karen Egiazarian

Copyright © 2010 Shih-Chang Hsia et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Recently region-of-interest (ROI) based image coding is a popular topic. Since ROI area contains much more important information for an image, it must be prevented from error decoding while suffering from channel lost or unexpected attack. This paper presents an efficient error concealment method to recover ROI information with a hiding technique. Based on the progressive transformation, the low-frequency components of ROI are encoded to disperse its information into the high-frequency bank of original image. The capability of protection is carried out with extracting the ROI coefficients from the damaged image without increasing extra information. Simulation results show that the proposed method can efficiently reconstruct the ROI image when ROI bit-stream occurs errors, and the measurement of PSNR result outperforms the conventional error concealment techniques by 2 to 5 dB.