Description: 一种基于感知模型的盲水印算法 ：根据Watson模型，结合仿射变换置乱技术和DCT量化系数奇偶特性，本文提出了一种在分块DCT中频交流系数中嵌
入有含义二值水印图像，以实现盲检测的水印方案。实验结果表明，该算法对于JPEG有损压缩、图像剪切等处理有很强的
鲁棒性。-a model based on the perception of the blind watermarking algorithm : According to Watson model, with affine transformation Scrambling Technology and DCT coefficient quantization Parity characteristics, This paper presents a block in exchange DCT coefficient meaning embedded in a binary image watermarking, Blind to achieve the watermark detection program. Experimental results show that the algorithm for JPEG lossy compression, image processing shear is very robust. Platform: |
Size: 225358 |
Author:ghostsx |
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Description: purpose
simulates embedding and detection of watermark in random noise using QIM (quantization index modulation), uses non-linear scaling
compile
gcc -g -o nlqim nlqim.c -lm
-purpose simulates embedding and detectio n of watermark in random noise using QIM (quanti index modulation. 5), uses non-linear scaling compile gcc-g-o nlqim nlqim.c - lm Platform: |
Size: 1019 |
Author:王国树 |
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Description: 一种基于感知模型的盲水印算法 ：根据Watson模型，结合仿射变换置乱技术和DCT量化系数奇偶特性，本文提出了一种在分块DCT中频交流系数中嵌
入有含义二值水印图像，以实现盲检测的水印方案。实验结果表明，该算法对于JPEG有损压缩、图像剪切等处理有很强的
鲁棒性。-a model based on the perception of the blind watermarking algorithm : According to Watson model, with affine transformation Scrambling Technology and DCT coefficient quantization Parity characteristics, This paper presents a block in exchange DCT coefficient meaning embedded in a binary image watermarking, Blind to achieve the watermark detection program. Experimental results show that the algorithm for JPEG lossy compression, image processing shear is very robust. Platform: |
Size: 225280 |
Author:ghostsx |
Hits:
Description: purpose
simulates embedding and detection of watermark in random noise using QIM (quantization index modulation), uses non-linear scaling
compile
gcc -g -o nlqim nlqim.c -lm
-purpose simulates embedding and detectio n of watermark in random noise using QIM (quanti index modulation. 5), uses non-linear scaling compile gcc-g-o nlqim nlqim.c- lm Platform: |
Size: 1024 |
Author:王国树 |
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Description: 利用STDM方法嵌入水印信息，可设置量化步长，选择各种经典的攻击方式，控制攻击强弱，返回误码率和峰值信噪比-Stdm method using embedded watermark information, to set the quantization step size, choose a variety of classic attacks, controlling the strength of the attack and returned to the bit error rate and peak signal to noise ratio Platform: |
Size: 56320 |
Author:张湛 |
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Description: matlab编的基于图像矢量量化的水印程序，用分割码本的办法嵌入水印！-matlab for image vector quantization-based watermarking process, with the approach of the division of code embedded watermark! Platform: |
Size: 2048 |
Author:周赟 |
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Description: 本文算法是将24 位真彩图的亮度分量分块
DCT ,然后利用DCT 量化系数的奇偶特性嵌入8
位灰度水印图,并通过PN 序列加密来保证水印的
安全性。算法中,将灰度图像转换为二进制数据
流,置乱后扩频调制,隐藏在宿主DCT 系数量化值
中,提取时不需要宿主信号,实现水印信号的盲提
取。-This algorithm is 24-bit true color pictures of the luminance component of block DCT, quantization DCT coefficients and then use the parity properties of 8-bit grayscale watermark embedding map, and through the PN sequence of encryption to ensure the security of the watermark. Algorithm, the gray image into binary data stream, scrambling after the spread spectrum modulation, hidden in the host DCT coefficient quantization values, the extraction does not require the host signal, the blind watermark extraction. Platform: |
Size: 284672 |
Author:王秀梅 |
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Description: 研究了一种图像水印技术, 该算法利用人类视觉系统( HVS)的特性, 根据JPEG量化表自适
应地调整, 采用随机置乱变换的方法进行空域关系调整, 将水印嵌入到图像的DCT 低频分量中-A kind of image watermarking techniques, the algorithm uses the human visual system (HVS) characteristics, according to adaptively adjust the JPEG quantization table, the random method of scrambling transformation of spatial relationship adjustment, the watermark is embedded into the image of the low frequency DCT in Platform: |
Size: 114688 |
Author:彩虹 |
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Description: 量化算法是数字水印技术嵌入算法的重要组成部分。通过修改数字图像的低频系数将所需嵌入的水印信息嵌入到载体图像中-Quantization Watermarking embedding algorithm is an important part. Digital image by modifying the frequency coefficients will be required to embed the watermark information is embedded into the carrier image Platform: |
Size: 1024 |
Author:舒旭 |
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Description: 在图像的DCT系数上嵌入信息，图像为常见的512*512大小的灰度图（实验所用图像为LENA.BMP）。嵌入的信息为一二进制Logo图（实验所用logo图为LOGO.bmp），该图大小为64*64，共4096个Bit。
1. 使用STDM方法在LENA图中嵌入水印，输出嵌入后的水印图像。
2. 对水印图像解码，输出解码后得到的logo图，并统计错误率。
3. 在相同的量化步长下，观察不同强度的噪声攻击下系统性能的变化
4. 在相同的量化步长下，观察不同强度的JPEG压缩下系统性能的变化
-Information embedded in the DCT coefficients of the image, the image of the common 512* 512 size gray-scale (experimental image LENA.BMP).Information embedded as a binary Logo Figure (experiment with the logo picture shows the LOGO.bmp), the plot size is 64* 64, a total of 4096 Bit.
(1) the use of the STDM method watermarked LENA Figure, output embedded watermark image.
(2) logo watermark image decoding, the output decoded Figure statistical error rate.
The same quantization step, the observed changes in the system performance under different intensity of noise attack
The same quantization step, the observed changes in the strength of JPEG compression system performance under
Platform: |
Size: 850944 |
Author:lsc |
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Description: 下载的基于均值量化各种应用的音频水印，共11篇-Download the audio watermarking based on mean quantization variety of applications, a total of 11 Platform: |
Size: 3516416 |
Author:李 |
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Description: 根据《Multipurpose Image Watermarking Algorithm Based on Multistage Vector Quantization》这篇论文进行的基于LABVIEW平台的仿真实验，其中包括了多级-残差矢量量化编码、索引约束矢量量化、鲁棒水印和脆弱水印的嵌入等技术和算法。LABVIEW版本至少为2010。-Multipurpose Image Watermarking Algorithm Based on Multistage Vector Quantization this paper LABVIEW platform-based simulation experiments, including multi-level- residual vector quantization coding, the index constrained vector quantization, robust watermark and fragile watermark embeddingtechniques and algorithms. LABVIEW version at least 2010. Platform: |
Size: 456704 |
Author:王玄 |
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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 Platform: |
Size: 758784 |
Author:CXF |
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Search - quantization watermark