A Design and Implementation of Threshold-adjusted EZW Codec 


Vol. 9,  No. 1, pp. 57-66, Feb.  2002
10.3745/KIPSTB.2002.9.1.57


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  Abstract

In this paper, we propose a method for the improvement of EZW encoding algorithm. The EZW algorithm encodes wavelet coefficients using 4 symbols such as POS(POSitive), NEG(NEGative), IZ(Isolated Zero), and ZTR(ZeroTreeRoot) which are determined by the significance of wavelet coefficients. In this paper, we applied threshold to wavelet coefficients to improve the EZW algorithm. The coefficients below the threshold are adjusted to zero to generate more ZTR symbols in the encoding process. The overall EZW image compression system is constructed using run-length coding and arithmetic coding. The system shows remarkable results for various images. We finally present experimentation results.

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[IEEE Style]

H. J. Chae and H. S. Lee, "A Design and Implementation of Threshold-adjusted EZW Codec," The KIPS Transactions:PartB , vol. 9, no. 1, pp. 57-66, 2002. DOI: 10.3745/KIPSTB.2002.9.1.57.

[ACM Style]

Hi Jung Chae and Ho Suk Lee. 2002. A Design and Implementation of Threshold-adjusted EZW Codec. The KIPS Transactions:PartB , 9, 1, (2002), 57-66. DOI: 10.3745/KIPSTB.2002.9.1.57.

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