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A Geometrical Transformations Resistant Digital Watermarking Based on Quantization

机译:基于量化的抗几何变换数字水印

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摘要

A geometrical transformations resistant digital image watermarking based on quantization is described. Taking advantage of the rotation, scale and translation invariants of discrete Fouricr transform (DFT), each watermark bit is embedded into each homocenttic circles around the zero frequency term in DFT domain by quantizing the magnitude vector of Fourier spectrum. The embedded sequence can be extracted by "majority principles" without restoring to the original unmarked image. The experimental results show that the watermark is invisible and robust to any combination of geometrical transformations or common image processing techniques.
机译:描述了基于量化的抗几何变换数字图像水印。利用离散傅里叶变换(DFT)的旋转,缩放和平移不变性,通过量化傅里叶频谱的幅度矢量,将每个水印位嵌入DFT域中零频率项周围的每个同心圆中。可以通过“多数原理”提取嵌入的序列,而无需恢复原始的未标记图像。实验结果表明,水印对于几何变换或常规图像处理技术的任何组合都是不可见的且具有鲁棒性。

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