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提出一种用于数字图像版权保护的变换域水印算法 ,将随机序列作为水印信号嵌入在图像付里叶变换的重要系数的幅度成分中 ,并利用相关检测器进行水印检测。实验证明 ,该算法具有一定不可见性 ,对通常的图像处理 ,如剪切、噪声干扰等特别是几何旋转都具有很强的鲁棒性
A transform domain watermarking algorithm for digital image copyright protection is proposed. The random sequence is embedded as a watermark signal into the amplitude components of the important coefficients of image Fourier transform, and the correlation detector is used to detect the watermark. Experiments show that the algorithm has certain invisibility and is robust to common image processing such as clipping, noise interference and especially geometric rotation