DocumentCode :
2027685
Title :
Block-based image error concealment using fragile watermarking in error-prone channels
Author :
Keshavarzian, Razieh ; Aghagolzadeh, Ali ; Seyedarabi, Hadi ; Niya, Javad Musevi
Author_Institution :
Fac. of Electr. & Comput. Eng., Univ. of Tabriz, Tabriz, Iran
fYear :
2010
fDate :
27-28 Oct. 2010
Firstpage :
1
Lastpage :
6
Abstract :
The transmission of block-coded images over wireless channels results in lost blocks. In this paper, we propose a new error concealment method for covering up the high packet losses of an original image after its transmission through an error-prone channel. In this scheme, Discrete Wavelet Transform (DWT) is applied to each block of the original image in order to produce a lower resolution copy of the each block. Then, we choose approximation coefficients of each block as replica of the block and embed it into a remote block of the image in the spatial domain. It is shown that the proposed scheme provides significant improvement over existing algorithms in terms of both subjective and objective evaluations. This technique can be implemented for wireless channels to combat degradations in a backward-compatible scheme.
Keywords :
approximation theory; block codes; discrete wavelet transforms; image coding; image resolution; image watermarking; visual communication; wireless channels; DWT; approximation coefficients; block coded image transmission; block-based image error concealment; discrete wavelet transform; error-prone channel; fragile watermarking; image resolution; packet losses; wireless channel; Approximation methods; Decoding; Discrete wavelet transforms; Image reconstruction; PSNR; Pixel; Watermarking; Error concealment; Image transmission; Watermarking; Wireless channels;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Machine Vision and Image Processing (MVIP), 2010 6th Iranian
Conference_Location :
Isfahan
Print_ISBN :
978-1-4244-9706-5
Type :
conf
DOI :
10.1109/IranianMVIP.2010.5941148
Filename :
5941148
Link To Document :
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