-
QPSK1
说明： 基于Matlab的QPSK算法仿真，包含了算法结构，仿真图形等，仿真了通信过程中的调制过程。(Matlab simulation based on the QPSK method, including the algorithm structure, graphics, simulation, simulation of the communication process in the modulation process.)
- 2011-04-14 10:24:01下载
- 积分：1
-
iskh10_matlab_basic
pdf and CDF comparision
- 2012-04-08 01:01:28下载
- 积分：1
-
keytestforall
手机键值测试包，将扩展名改为JAR即可安装，适用于所有机型(phone pair test kits, will be extended to be changed JAR can be installed in all models)
- 2007-01-19 15:15:09下载
- 积分：1
-
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
-
IJ1185
小波包分解（wavelet packet decomposition）也可称为小波包（wavelet packet）或子带树（subband tree）及最佳子带树结构（optimal subband tree structuring）。其概念是用分析树来表示小波包，即利用多次叠代的小波转换分析输入讯号的细节部分。本案例主要用于小波包分解计算及绘图(The wavelet packet decomposition can also be called the wavelet packet or the subband tree and the best subband tree structure. The concept is to use the analysis tree to represent the wavelet packet, that is, to analyze the details of the input signal by the multiple iterative wavelet transform. This case is mainly used in the calculation and drawing of wavelet packet decomposition)
- 2017-12-18 17:00:42下载
- 积分：1
-
拉普拉斯边缘增强
说明： 使用拉普拉斯算子检测边缘，进行边缘增强，达到增强图像对比度的目的(Laplace operator is used to detect the edge and enhance the edge)
- 2021-02-02 14:56:52下载
- 积分：1
-
拉氏有限元
拉普拉斯方程的MATLAB有限元求解三维
- 2022-02-14 08:47:41下载
- 积分：1
-
Standard-Library
c标准库 参考手册 包括最有用的类和函数(Standard Library Reference)
- 2010-01-02 22:10:07下载
- 积分：1
-
Turbo_simulink
实现了Turbo码编码解码的matlab实例以及simulink仿真(Turbo Code)
- 2009-07-04 21:44:36下载
- 积分：1
-
collision
two balls collision using matlab
- 2010-05-20 21:10:13下载
- 积分：1
