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最大类间方差法是由日本学者大津(Nobuyuki Otsu)于1979年提出的,是一种自适应的阈值确定的方法,又叫大津法,简称OTSU。它是按图像的灰度特性,将图像分成背景和目标2部分。背景和目标之间的类间方差越大,说明构成图像的2部分的差别越大,当部分目标错分为背景或部分背景错分为目标都会导致2部分差别变小。(The largest between-class variance method was proposed by the Japanese scholar Nobuyuki Otsu in 1979. It is an adaptive threshold determination method, also known as the Otsu method, or OTSU for short. It is based on the grayscale characteristics of the image and divides the image into two parts: the background and the target. The larger the variance between the background and the target, the greater the difference between the two parts that make up the image. When the part of the target is wrongly divided into backgrounds or part of the background is mis-divided into goals, the difference between the two parts will be smaller.)

实现双目立体视觉中深度图的获取，程序输出结果为深度图，该方法速度比较快。(Binocular stereo vision depth map acquisition, program output as a depth map, the faster the speed of the method.)

c2dm send the request in server

说明：  用MATLAB实现激光雷达的三维点云的重建。(Reconstruction of 3D point cloud with MATLAB)

实现SIFT特征点的检测及图像拼接功能，主要在原来作者的基础上添加了显示全部特征点或者只显示重叠区域特征点，能够直接使用(Achieve SIFT feature point detection and image stitching function, mainly on the basis of the original author to add a point or show all the characteristics of overlap only feature points can be used directly)

program to compute 2d-maxima for a set of xy points. The xy data points are generated using a random number generator. The command to run the program at DOS prompt is: - compute 2d-maxima for 500 xy points .2dmaxima 500

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)

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.)

说明：  Hough 变换，探测圆的半径，可以探知未知圆的半径和圆心(Hough transform, circle detection radius, you can explore the unknown circle radius and center)

实现一个心行图案的各种二维几何变换（包括同比变换，错切变换，平移变换、旋转变换等）(achieve a mind trip of two-dimensional pictorial geometry transformation (including an transform, shear transformation, translation transform, ROTATION))