【摘要】 提出了一种基于曲波变换的彩色图像零水印构造和检测算法。利用原图像进行USFFT算法的曲波变换(Curvelet Transform)和离散余弦变换(DCT)得到的系数进行二值化处理,构造具有一定鲁棒性的水印,解决了水印嵌入时鲁棒性与隐蔽性之间的矛盾,更好地保护了原图像信息。该算法通过抗攻击测试和识别测试,证明其具有性能稳定、可行性高的特点。更多还原

【Abstract】 This paper puts forward an algorithm base on USFFT algorithm of Curvelet Transform,which is about constructing zero-watermarking and detection for digital colour image.The authors use Curvelet Transform and Discrete Cosine Transform to dispose the image and chalk up the coefficients,then dispose of the coefficients by Thresholding Processing,and construct watermark that possess robustness.It availably solves the antinomy between robustness and imperceptibility and protects the copyright of image better.The results of anti-attacking and identify tests prove the steady stabilization and feasibility of algorithm.更多还原