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Description: oJPEG2000中DWT的MATLAB实现n the use of discrete cosine transform DCT jpeg compression Matlab source, simple and practical, the Notes have a good time
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Author: 小户 |
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Description: dwt数字水印算法源代码，对剪切，加躁，旋转，JPEG压缩有较好的鲁棒性-dwt digital watermarking algorithm source code to shear, plus a bit, rotation, JPEG compression with better robustness
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Size: 184320 |
Author: qinjiying |
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Description: oJPEG2000中DWT的MATLAB实现n the use of discrete cosine transform DCT jpeg compression Matlab source, simple and practical, the Notes have a good time-DWT of MATLAB in oJPEG2000 realize n the use of discrete cosine transform DCT jpeg compression Matlab source, simple and practical, the Notes have a good time
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Size: 357376 |
Author: 小户 |
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Description: 数字水印在matlab下的ＤＷＴ仿真实现整个程序运行还行，共享给大家-jpeg of the Matlab Simulation, and the whole process has run OK, for everyone to share -Digital Watermarking in DWT under matlab simulation run also realize the entire process line, to share to everyone-jpeg of the Matlab Simulation, and the whole process has run OK, for everyone to share
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Size: 2048 |
Author: 小户 |
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Description: 是毕业设计的课题，用matlab的图像压缩dct和dwt。-Is the subject of graduation design, image compression using matlab DCT and dwt.
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Size: 8192 |
Author: 雷 |
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Description: 盲水印提取时不需要参考原始载体图像,在信息隐藏、版权保护等方面具有更广泛的应用前景。提出的盲水印算法在分块离散余弦变换(DCT)和离散小波变换(DWT)的基础上,利用关系双方DCT系数和DWT系数在受到攻击时具有相同变化趋势的特点,采用关系嵌入和量化嵌入的自适应选择嵌入策略,较大幅度地提高了盲水印提取的鲁棒性。同时在量化嵌入中采用抖动调制,实现了水印透明性和鲁棒性调节的便捷性。大量仿真实验结果表明该算法对噪声干扰、低通滤波、JPEG压缩、对比度增强等攻击有很好的鲁棒性和透明性。关键词 数字水印盲水印关系嵌入量化嵌入离散余弦变换离散小波变换
按这篇文章的算法，自己编的matlab,没有攻击时水印提取率为1，加水印后图像PSNR有45+，。有攻击后提取率也有0.9+。-Blind watermark extraction can be fulfilled without referring to the original host image. Therefore it hasmuch
prospective applications in the fields of information hiding and copyright protection. Based on blocking Discrete Cosine
Transform (DCT) and blocking DiscreteWaveletTransform (DWT), the proposed blind watermarking algorithm uses an
embedding strategy of adaptively selecting either relationship embedding or quantization embedding. The relationship em-
bedding comes from the observation thatboth themagnitudes of coefficients concerned in the relationship usually have thesame change trend when the image is attacked. This strategy remarkably improves the robustness ofwatermark extraction.In addition, dithermodulation is used in quantization embedding, bywhich the tradeoff between transparency and robus-tness ofwatermarking can be easily adjusted. Simulation results show that the algorithm is fairly robust against the attacks such as noise, filtering, compression, and contrast
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Author: CXF |
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