A lossy image coding scheme for wireless multimedia sensor network

Author

Zhang Longmei;Lu Wei

Author_Institution

School of Communication and Information Engineering, Xi´an University of Science and Technology, Xi´an, China

fYear

2015

Firstpage

1

Lastpage

4

Abstract

A simple, high-efficient and energy saving image coding scheme is proposed in this paper, which is suitable for wireless multimedia sensor network. The scheme is based on lifting wavelet transform and SPIHT algorithm. To solve the very low executing efficiency problem of the combined algorithm, we make improvements in two aspects. Firstly, by eliminating the computation and coding of the outmost high-pass coefficients, the energy consumption of the transform is reduced and the execution is speed up. Secondly, by using optimized quantization truncation pretreatment with high-pass subband coefficients, it is avoided that coding mass of small value coefficients of the high-pass subbands, which further improves the executing efficiency. The simulation results show up to 90% reduction in the executing time is achieved by choosing the optimized truncation threshold, with the guarantee for the image quality of 34.5dB.

Keywords

"Wavelet transforms","Image coding","Algorithm design and analysis","Quantization (signal)","Image reconstruction","Image quality"

Publisher

ieee

Conference_Titel

Signal Processing, Communications and Computing (ICSPCC), 2015 IEEE International Conference on

Print_ISBN

978-1-4799-8918-8

Type

conf

DOI

10.1109/ICSPCC.2015.7338880

Filename

7338880