Abstract
The paper presents a class of nonlinear adaptive wavelet transforms for lossless image compression. In update step of the lifting the different operators are chosen by the local gradient of original image. A nonlinear morphological predictor follows the update adaptive lifting to result in fewer large wavelet coefficients near edges for reducing coding. The nonlinear adaptive wavelet transforms can also allow perfect reconstruction without any overhead cost. Experiment results are given to show lower entropy of the adaptive transformed images than those of the non-adaptive case and great applicable potentiality in lossless image compression.
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Foundation item: Supported by the National Natural Science Foundation of China (69983005)
Biography: ZHANG Dong (1963-), male, Associate professor, research direction: medical imaging, image communication, multiresolution analysis and its applications.
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Zhang, D., Yang, Y. & Qin, Q. Nonlinear adaptive wavelet transform for lossless image compression. Wuhan Univ. J. of Nat. Sci. 12, 267–270 (2007). https://doi.org/10.1007/s11859-006-0036-y
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DOI: https://doi.org/10.1007/s11859-006-0036-y