Blocking Artifacts Reduction in Block-Coded Images Using NNF in Wavelet Transform Domain 


Vol. 27,  No. 5, pp. 482-489, May  2002


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  Abstract

In this paper, a novel algorithm for reducing the blocking artifacts in block-based coded images is proposed using NNF in wavelet transform domain. In this algorithm, we used two characteristics, those are, knowing a location of occurring the blocking artifacts in each band and discriminating between the horizontal and vertical blocking artifacts by using the wavelet transformed signal. As such, after performing a 2.level wavelet transform of block-based coded image, according to the characteristics of each level a different NNF is used to reduce the blocking artifacts. Experimental results showed that the proposed algorithm improved the PSNR from 0.40 dB to 0.89 dB in JPEG decoded images, and produced better results than conventional algorithms both subjectively and object ively.

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  Cite this article

[IEEE Style]

K. Kwon, B. Kim, S. Lee, J. Lee, S. Kwon, K. Lee, "Blocking Artifacts Reduction in Block-Coded Images Using NNF in Wavelet Transform Domain," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 5, pp. 482-489, 2002. DOI: .

[ACM Style]

Kee-Koo Kwon, Byung-Ju Kim, Suk-hwan Lee, Jong-Won Lee, Seong-Geun Kwon, and Kuhn-Il Lee. 2002. Blocking Artifacts Reduction in Block-Coded Images Using NNF in Wavelet Transform Domain. The Journal of Korean Institute of Communications and Information Sciences, 27, 5, (2002), 482-489. DOI: .

[KICS Style]

Kee-Koo Kwon, Byung-Ju Kim, Suk-hwan Lee, Jong-Won Lee, Seong-Geun Kwon, Kuhn-Il Lee, "Blocking Artifacts Reduction in Block-Coded Images Using NNF in Wavelet Transform Domain," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 5, pp. 482-489, 5. 2002.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880