【摘要】 该文基于QSWT提出了一个数字图像水印的算法,该算法针对水印嵌入子带的选取、子带阀值的计算、QSWT的构造、水印的嵌入和提取都给出了相应的策略。实验证明算法对常用的图像处理攻击如JPEG压缩、低通滤波、剪切、加噪和旋转等攻击具有较好的鲁棒性和不可见性。更多还原

【Abstract】 In this paper,a digital watermark algorithm based on the qualified significant wavelet tree (QSWT) is proposed.This algorithm presents corresponding strategy to select embedded subband for watermarking,calculate the subband threshold,construct the QSWT,embed and extract the watermark.The experiment results show that the algorithm provides high robustness and imperceptibility against the original image process attacks such as JEPG compression,low-pass filter,cropping,noise and rotating etc.更多还原