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• W2064055503 abstract "We propose a novel automatic side-scan sonar image enhancement algorithm based on curvelet transform. The proposed algorithm uses the curvelet transform to construct a multichannel enhancement structure based on human visual system (HVS) and adopts a new adaptive nonlinear mapping scheme to modify the curvelet transform coefficients in each channel independently and automatically. Firstly, the noisy and low-contrast sonar image is decomposed into a low frequency channel and a series of high frequency channels by using curvelet transform. Secondly, a new nonlinear mapping scheme, which coincides with the logarithmic nonlinear enhancement characteristic of the HVS perception, is designed without any parameter tuning to adjust the curvelet transform coefficients in each channel. Finally, the enhanced image can be reconstructed with the modified coefficients via inverse curvelet transform. The enhancement is achieved by amplifying subtle features, improving contrast, and eliminating noise simultaneously. Experiment results show that the proposed algorithm produces better enhanced results than state-of-the-art algorithms." @default.
• W2064055503 created "2016-06-24" @default.
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• W2064055503 date "2015-01-01" @default.
• W2064055503 modified "2023-10-14" @default.
• W2064055503 title "Automatic Side-Scan Sonar Image Enhancement in Curvelet Transform Domain" @default.
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• W2064055503 doi "https://doi.org/10.1155/2015/493142" @default.
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