Satellite-orbit

一种属性离散化的方法，对粗糙集适用(An attribute discretization method, the rough set for)

nsct 非下采样的contourlet变换的matlab工具箱,很详细的(nsct non-sampled contourlet transform Matlab toolbox, a very detailed)

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.)

说明：  通过设置5个不同的时域窗尺度和8个方向（theta），得到40个Gabor滤波器。但在滤波器显示的时候出现了问题。以下分别把程序的源代码、调用代码(Forty Gabor filters are obtained by setting 5 different time window scales and 8 directions (theta). But there was a problem when the filter was displayed. The following procedures are the source code, call code)

计算机图形学 图形填充算法 有序边表算法 通用性强 新边表建立有新意(Computer graphics graphics to fill algorithm ordered edge list algorithm versatility of the new side table to establish innovative)

一种简易有效的CT图像三维重建方法。利用MATLAB软件编写，实现CT图像的面绘制。(A simple and effective method of three-dimensional reconstruction of the CT image. Using MATLAB software development, surface rendering of the CT image.)

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)

对二维数据进行变分模态分解，可用于地震数据去噪等(Variational mode decomposition of two-dimensional data can be used for seismic data denoising, etc.)

说明：  用VB开发的简单二维绘图程序，特别推荐其中的关于图形几何算法，包括点、直线、圆、圆弧之间的距离、交点、切点。(VB development of simple two-dimensional mapping procedures, in particular the recommendation of the graphic geometric algorithms, including point, line, circle, arc gap between Nodal, the cut-off point.)

This Program Deals With All Two-D Transformation Such As Translation, Scaling, Rotation, Reflection, Shearing In Homogeneous Coordinates. 3-D Transformation bresenham line drawing polygon filling polygon clipping