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An image multiresolution representation for lossless and lossy compression

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2 Author(s)
Said, A. ; Fac. of Electr. Eng., Campinas State Univ., Sao Paulo, Brazil ; Pearlman, W.A.

We propose a new image multiresolution transform that is suited for both lossless (reversible) and lossy compression. The new transformation is similar to the subband decomposition, but can be computed with only integer addition and bit-shift operations. During its calculation, the number of bits required to represent the transformed image is kept small through careful scaling and truncations. Numerical results show that the entropy obtained with the new transform is smaller than that obtained with predictive coding of similar complexity. In addition, we propose entropy-coding methods that exploit the multiresolution structure, and can efficiently compress the transformed image for progressive transmission (up to exact recovery). The lossless compression ratios are among the best in the literature, and simultaneously the rate versus distortion performance is comparable to those of the most efficient lossy compression methods

Published in:

Image Processing, IEEE Transactions on  (Volume:5 ,  Issue: 9 )

Date of Publication:

Sep 1996

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