Efficient embedded subband coding algorithm for DCT image compression

Jun Chen; Chengke Wu

doi:10.1117/12.442929

26 September 2001 Efficient embedded subband coding algorithm for DCT image compression

Jun Chen, Chengke Wu

Author Affiliations +

Proceedings Volume 4551, Image Compression and Encryption Technologies; (2001) https://doi.org/10.1117/12.442929
Event: Multispectral Image Processing and Pattern Recognition, 2001, Wuhan, China

Abstract

A low memory embedded subband image coding algorithm based on the discrete cosine transform (DCT) with low complexity and high performance is presented in this paper. The zerotree-based coder SPIHT and the zeroblock-based coder SPECK have found more successful application in wavelet image compression. Xiong et al.'s EZDCT scheme also employs the zerotree structure and fulfills a DCT-based embedded zerotree quantizer with its performance outperforming the baseline JPEG and improved JPEG. We point out the zerotree structure of DCT is not efficient in embedded DCT coder. Without relying on the zerotree structure, we propose a more efficient embedded subband codec based on the zeroblock partitioning for the DCT image (ESDCT) with lower memory requirements and higher compression performance. A comparison reveals that PSNR results of our ESDCT and are 0.5-1.5 dB higher than those of EZDCT and the compression performance is slightly superior to SPIHT in some cases.

Citation Download Citation

Jun Chen and Chengke Wu "Efficient embedded subband coding algorithm for DCT image compression", Proc. SPIE 4551, Image Compression and Encryption Technologies, (26 September 2001); https://doi.org/10.1117/12.442929

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