colorspace

计算一副图像的信息熵，如需计算多幅图像，只需修改名称即可(Calculating an image information entropy, calculated for multiple images, you can just change the name)

matlab与CC++混合编程程序，可以参考下，适合初学者(matlab and C C++ mixed programming program, you can refer to, for beginners)

一个功能强大的数值分析程序，含有matlab中的guide界面设计，程序都有注释，易懂。(A powerful numerical analysis procedures, the guide contains the matlab interface design, application has comments, easy to understand.)

介绍了 Cohen类双线性时频分布并针对交叉干扰项影响无法完全消除的问题进行了重排时频变换以提取及分辨 含有白噪声和窄带周期干扰的局部放电信号。处理仿真和现场检测到的局部放电超声信号时根据白噪声和窄带 周期干扰信号在时域上的平稳性特性发现重排 Cohen类时频变换方法不仅可以很好地将局放信号和背景噪声以 及窄带周期干扰信号分辨开来,而且大大减弱并抑制了交叉干扰项的影响,保持了更高的时频分辨率和时频聚集 性,从而验证了重排 Cohen类时频变换方法的有效性。 (In order to express the partial discharge ( PD) information of gas insulated switchgear ( GIS) in time-frequency domain, weintroduced theCohen? s class bilinear time-frequency distribution and its reassigned time-frequency transform method to pick up and distinguish theultrasonic signals in field from the whitenoises and narrow band periodic interference signals using the acousticemission ( AE) technology. After the processing of the simulated and PD ultrasonic signals in field, and according to the stationary feature of white noises and narrow band interference signals, wedraw a conclusion that the reassigned time-frequency distribution method can not only distinguish thePD signal from back ground noises and narrow band interference signals, but also decrease and restrain the influenceof cross-items, and acquire better time )

说明：  基于互信息的特征选择算法，运用互信息来进行特特征选择的(Mutual information feature selection)

采用matlab实现正交频分复用技术，用于各种现代数字处理中。(Using matlab to achieve orthogonal frequency division multiplexing, for a variety of modern digital processing.)

说明：  DS-CDMA通信系统仿真程序——包括扩频码的产生，发射机、接收机及性能分析等(DS-CDMA Communication System Simulation Program- including the spread spectrum code generation, transmitter, receiver and performance analysis)

上述代码对光纤通信系统中的常用NRZ码时域和频域特性进行了分析，NRZ适于短距离低速率光纤通信系统中使用，其频谱特性相对于RZ码频谱较窄，但峰值功率较高，对非线性容忍度较小(NRZ,modulation,PMD analysis)

说明：  this is simple signal processing matlab code

说明：  集成好的focuss算法函数和DOA测试文件(A FOCUSS function and DOA test file, for learning sparse reconstruction.)