2D_Obstacle

本例用matlab实现了三维图形的重建，效果不错(Example matlab realize this with the reconstruction of three-dimensional graphics, good results)

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.)

nurbs曲面拟合，采用nurbs算法，对随机生成点阵进行曲面拟合(nurbs surface fitting using nurbs algorithm, on randomly generated lattice for surface fitting)

3D点云的三角化程序，有多个模型验证三角化程序的有效性(triangulation of point cloud.many models validates the effectiveness of the triangulation.)

说明：  c++的绘制二维等值线源码。有示例数据，可以运行。(c++ two-dimensional contour map of the source。c++ code for contour map)

三维重建是指对三维物体建立适合计算机表示和处理的数学模型,是在计算机环境下对其进行处理、操作和分析其性质的基础,也是在计算机中建立表达客观世界的虚拟现实的关键技术。(Three-dimensional reconstruction refers to the establishment of a mathematical model suitable for computer representation and processing of three-dimensional objects. It is the basis for processing, manipulating and analyzing their properties in the computer environment. It is also the key technology for establishing a virtual reality to express the objective world in the computer.)

本资源给出了用matlab画各种三维图的源代码，非常齐全。(The resorce provides the resorce programs of drawing 3D maps using matlab.)

shape from shaping 3D重构(shape from shaping 3D reconstructed)

说明：  通过使用MATLAB语言建立三维渐开线齿轮啮合模型(use MATLAB to draw 3-D gear)

说明：  这个程序用于在图片中增加各种噪声，如高斯椒盐噪声, 加性或乘性等多种混合噪声，用于其它程序的测试。(This procedure is used to increase the variety of picture noise, such as salt and pepper Gaussian noise, additive or multiplicative noise, such as a mixture for testing other programs.)