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EZW takes equal important code for all frequencies, so it can't make use of the characteristics of the wavelet's coefficient completely. The coding time is too long and the coding efficiency is low during the process of gradually approximating and quantizing, so we put forward the separate-frequency EZW. This algorithm codes the high and low frequencies of wavelet image respectively. And the results...
The dyadic multi-resolution analysis (MRA) has a drawback, that is, there is frequency distortion in the high frequency subband, and frequency distortion is happened more serious in the process of decomposition of the dyadic wavelet packet transform. This paper presents a contribution to the 3/2 wavelet packet transform. The new algorithm includes: the method of decimation; the structure of signal...
Aiming at the limited resources and data transmission redundancy of WSN, this paper proposes a novel data compression algorithm based on lifting wavelet transform, gives the rational design. The algorithm distributes the computing quantity which the lifting wavelet transform requires to all nodes, eliminates extra computing and data transmission, reduces the information redundancy of network, greatly...
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