p4p-problem-matlab-code

matlab gui实现三维图形的旋转，平移及缩放(matlab gui to achieve rotation, translation and scaling of 3D graphics)

osgearth的文档资料不多，这里几乎是所有可以找到的中文资料，以及一些osg的中文资料(osgearth documentation much, here you can find almost all the Chinese data, as well as some of the Chinese data osg)

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.)

三维点云数据读取并显示。格式为按行读取，坐标为（X,Y,Z）(3D point cloud data read and displayed. The format is read by line, the coordinates (X, Y, Z))

这是一个博士编写的关于RBF插值的三维重建的源程序，有需求的人赶紧下！(This is a prepared by Dr. RBF interpolation on the three-dimensional reconstruction of the source, there is a demand for people who hastened to the next!)

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：  对高光谱图像进行目标检测，首先滤波处理然后降维，利用输出能量最小原则用于探测亚像元的小目标。(In target detection of hyperspectral images, first filter processing and then dimensionality reduction are used to detect sub-pixel small targets by using the principle of minimum output energy.)

说明：  Snake模型，也就是常说得Active Contour模型的MATLAB实现，其中还包含了原文献。(Snake model, which is often put Active Contour MATLAB model, it also includes the original literature.)

根据降雨数据和流量数据，可在同一张图上绘制倒立的降雨柱状图和对应的流量过程线(According to rainfall data and flow data, inverted rainfall column charts and corresponding flow process lines can be drawn on the same chart.)

时间4阶，交错网格，有限差分方法，波动方程(time 4—order ，staggered grid， fd )