PCA

说明：  基于matlab对三维点云的法向量进行求取，并进行朝向统一。(Based on MATLAB, the normal vector of three-dimensional point cloud is calculated, and the direction is unified.)

MATLAB编写的角点检测程序，用于对目标的检测和稳定的跟踪。很适合对于运动目标的跟踪。(Corner detection procedures written in MATLAB for target detection and tracking. Very suitable for tracking of moving targets.)

产生余弦的四种相位竖条纹，做三维形貌测量用。(Cosine of zero-phase vertical stripes, three-dimensional shape measurement)

用matlab编写的Delaunay三角化的程序，在points里面修改自己的初始点。(Delaunay triangulation using matlab program to modify the initial point, the points inside.)

Matlab 三维点云三角化 不是平面域的三角化 是三维点云三角化 亲身测试绝对可用！(Triangle of Point Cloud)

直接运行TestMyCrust.m, 读取点云txt,或者直接加载mat文件 运行需要几分钟，耐心等待 完成后运行trianglenormal.m, 生成三角面片的法向量 运行完成得到tri.txt（组成三角面片的点的编号信息）,trinormal.txt(每个三角面片法向量数值)，diandian.txt(每个点云信息) 然后将三个数据当做stl_gen.exe的输入文件，得到trisuface.stl文件(run TestMyCrust.m, read point cloud file txt, or load mat file)

计算拉普拉斯抠图矩阵 用于获得轮廓等 很好用(Matting Laplacian matrix calculations used to obtain contour, etc.)

给定一个图像，其中包含足够的信息来计算地平面消失线和垂直消失点，以及一个已知高度的物体。然后，只要他们的头部和脚都可见，就可以在场景中的任何地方测量站在地平面上的人的高度。(Given an image which contains sufficient information to compute the ground plane vanishing line and the vertical vanishing point, and also one object of known height for which the top and base are imaged. Then the height of a person standing on the ground plane can be measured anywhere in the scene provided that their head and feet are both visible.)

可以用于画世界地图。这个函数可以通过控制经纬度画不同范围的世界地图。(Can be used to draw the world map. This function can be painted by controlling the latitude and longitude of different areas of the world map.)

Prewitte边缘算子法(Prewitte Edge Operators)