高斯滤波

说明：  声呐或者雷达系统发射信号后，通过波束形成算法对两个目标（方位分别为theta1、theta2）回波进行仿真，经过相位补偿，可以看出图像有两个波峰，波峰处指向性函数峰值最大，峰值所对应的的角度值即为目标的方位角。所以该程序对数字波束形成（DBF）的原理进行了仿真，适合初学者掌握阵列信号处理中数字波束形成的原理。(After the sonar or radar system transmits the signal, the echo of the two targets (the azimuth is theta1 and theta2 respectively) is simulated by the beamforming algorithm. After the phase compensation, it can be seen that the image has two peaks, the peak of the directivity function is the largest, and the corresponding angle value of the peak is the azimuth of the target. So the program simulates the principle of DBF, which is suitable for beginners to master the principle of DBF in array signal processing.)

说明：  可以计算图像结构相似性，评价图像质量(Similarity of image structure can be calculated and image quality can be evaluated)

fast RPCA背景检测,较为经典的一种算法，亲测可用(fast rpca method for background selection)

说明：  利用PCA对人脸图像进行降维，然后训练神经网络分类器的Matlab程序(the Matlab in face recoginization using PCA algorithm)

聚类有效性指标,比较全，功能比较强大，是学习聚类的好工具(Clustering Validity Indices)

5.在面板中画圆弧的程序，帮助你画出你想要的圆弧。(5 arc in the panel painting program to help you draw your desired arc.)

程序进行了两张图片的简单合并，适合对控件的使用进行学习(Procedures carried out two simple merger picture, suitable for the control of the use of learning)

说明：  基于内容的图像检索系统，用matlab编写的，用户可以方便地修改添加新特征，减少工作量。(Content-based image retrieval systems, written with matlab, the user can easily modify to add new features, reduce the workload.)

说明：  实现脉搏波信号心率变异性分析,时域分析，频域分析和非线性分析(HRV analysis of the PPG signals)

说明：  使用matlab进行图像去雾，有助于帮助刚入门的图像小白学习matlab图像处理(Matlab image defogging, helpful to help beginners learning image white matlab image processing)