• Acta Optica Sinica
  • Vol. 28, Issue s2, 77 (2008)
Sun Yubao1、*, Xiao Liang1, Wei Zhihui1, and Hu Xiyuan2
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
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    Sun Yubao, Xiao Liang, Wei Zhihui, Hu Xiyuan. Low-Rate and Scalable Image Coding with Sparse Representations[J]. Acta Optica Sinica, 2008, 28(s2): 77 Copy Citation Text show less

    Abstract

    Based on geometric properties of the local image structures and the perception characters of human visual system (HVS), a geometrically motivated Gabor multi-component perception dictionary is constructed. Moreover, inspired from the hierarchical information processing in the human visual path, a sparse coding network is proposed to reduce high order redundancy, thus provides much sparser representations of images. Furthermore, coefficients of repositioned atoms in sparse approximation are quantized by bit-plane quantization. It presents an effective low bit-rate and scalable image compression algorithm. Our simulation results show that, under the low bit-rate, our approach is comparable to the JPEG2000 in terms of PSNR value, while effectively preserves edges and textures structures and exhibits generally a better visual quality.
    Sun Yubao, Xiao Liang, Wei Zhihui, Hu Xiyuan. Low-Rate and Scalable Image Coding with Sparse Representations[J]. Acta Optica Sinica, 2008, 28(s2): 77
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