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low_pass
图像的低通滤波器,用MATLAB设计一个3×3模板标准差为0.5的高斯低通滤波。(Image low-pass filter MATLAB design, a standard template for 3 x 3 0.5 gaussian low-pass filter)
- 2010-06-09 15:31:34下载
- 积分：1
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A-Watermarking-Algorithm(MATLAB)--
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 )
- 2013-04-14 16:15:47下载
- 积分：1
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propagDifferentMedSoftSource
this program simulates 1D electromagnetic Maxwell equations "soft source", by using finite difference time domain method FDTD
- 2013-08-28 17:21:35下载
- 积分：1
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matlab-help
MATLAB 中文 帮助 菜单（交互式窗口界面） (MATLAB Chinese Help menu (interactive window interface))
- 2013-09-24 00:55:08下载
- 积分：1
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MATLAB
matlab编程学习资料，从最基本理论讲解，循序渐进，适用于初学者。(the matlab programming learning materials, from the most basic theory to explain, step-by-step, suitable for beginners.)
- 2012-12-01 17:13:48下载
- 积分：1
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fir
matlab中实现有限相应滤波器FIR的程序(matlab limited to achieve the corresponding procedures for FIR Filter)
- 2008-01-03 14:30:29下载
- 积分：1
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GAforFunction
基于Matlab的函数优化遗传算法程序 .(based on Matlab function of genetic algorithm optimization procedures.)
- 2006-10-23 20:56:16下载
- 积分：1
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Based-on--ESPRIT-
摘 要:基于子空间分解的ESPRIT算法常用在阵列处理中对目标进行DOA估计.如果将空间的位移变成时间的
延迟,单个矢量传感器可以实现高分辨率的频率估计.将ESPRIT与矢量传感器相结合,研究了高分辨率频率估计
算法,建立了矢量传感器的数据模型,推导了矢量传感器的空时阵列流形,通过对协方差矩阵进行子空间分解,求得
目标信号的频率估计值.仿真计算研究了不同信噪比!采样频率和数据长度条件下该算法的性能.结果表明基于矢
量传感器的算法比基于声压传感器的算法具有更高的频率估计精确度.
关键词:矢量传感器 ESPRIT算法 频率估计(Based on subspace decomposition of the ESPRIT algorithm commonly used in array processing in the target DOA estimation if the displacement into a space of time
Delay, a single vector sensor can achieve high-resolution frequency estimation. )
- 2011-06-23 15:32:20下载
- 积分：1
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Matlab
《Matlab编程_第二版》对于初学者来讲是一份不错的资料
(" Matlab programming _ the second edition of" speaking for beginners is a good information)
- 2013-09-25 19:38:20下载
- 积分：1
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project-3-2b
Implement the histogram equalization technique
- 2013-04-16 15:12:07下载
- 积分：1
