Sparse representation based down-sampling image compression
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摘要
In this paper, we give an analytical model of the compression error of down-sampled compression based on wavelet transform, which explains why down-sampling before compression can improve coding performance. And we approximate the missing details due to down-sampling and compression by using the linear combination of a set of basis vectors with L1 norm. Then we propose a down-sampled and high frequency information approximated coding scheme and apply it to natural images, and achieve gains of both subjective quality and objective quality compared with JPEG2000.
论文关键词:Wavelet,Error analysis,Sparse representation,Optimization
论文评审过程:Available online 1 July 2011.
论文官网地址:https://doi.org/10.1016/j.cam.2011.06.025