Weather Radar Data Compression Based on Zerotree Wavelet Algorithm

Wavelet based image compression is getting popular due to its promising compaction properties at low bit-rate. Zerotree wavelet image coding scheme efficiently exploits multi-level redundancy presented in transformed data to minimize coding bit. In this paper, a novel compression algorithm for weath...

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Bibliographic Details
Main Authors: Yun-Xian Huang, Wei-Hua Ai
Format: Conference Proceeding
Language:English
Subjects:
Arithmetic
Azimuth
Data compression
Discrete wavelet transforms
Image coding
Meteorological radar
Radar antennas
Radar imaging
Wavelet transforms
Weather forecasting
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Summary:Wavelet based image compression is getting popular due to its promising compaction properties at low bit-rate. Zerotree wavelet image coding scheme efficiently exploits multi-level redundancy presented in transformed data to minimize coding bit. In this paper, a novel compression algorithm for weather radar data based on zerotree coding is presented. Considering the dependence of radar data, an efficient pre-processing algorithm of the data is given first and the redundancy of the data is efficiently reduced. Then an advanced embedded zerotree wavelet encoding algorithm is presented which uses context-based adaptive arithmetic coding to improve its performance. Experimental results show that for weather radar data, the proposed algorithm achieves good PSNR even in very low bit rate.
DOI:10.1109/CISP.2009.5301277