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• W3150495862 abstract "In this paper, a novel high dynamic range (HDR) image zero-watermarking algorithm against the tone mapping attack is proposed. In order to extract stable and invariant features for robust zero-watermarking, the shift-invariant shearlet transform (SIST) is used to transform the HDR image. Firstly, the HDR image is converted to CIELAB color space, and the L component is selected to perform SIST for obtaining the low-frequency subband containing the robust structure information of the image. Secondly, the low-frequency subband is divided into nonoverlapping blocks, which are transformed by using discrete cosine transform (DCT) and singular value decomposition (SVD) to obtain the maximum singular values for constructing a binary feature image. To increase the watermarking security, a hybrid chaotic mapping (HCM) is employed to get the scrambled watermark. Finally, an exclusive-or operation is performed between the binary feature image and the scrambled watermark to compute robust zero-watermark. Experimental results show that the proposed algorithm has a good capability of resisting tone mapping and other image processing attacks." @default.
• W3150495862 created "2021-04-13" @default.
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• W3150495862 date "2021-03-26" @default.
• W3150495862 modified "2023-10-16" @default.
• W3150495862 title "A Novel HDR Image Zero-Watermarking Based on Shift-Invariant Shearlet Transform" @default.
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• W3150495862 doi "https://doi.org/10.1155/2021/6662700" @default.
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