DrawAckley

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.)

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)

osgEarth的地形分页流程，我大致的写一下，感兴趣的话，大家可以去代码中看看，以MPEngine为例(osg tile TilePagedLOD* plod = new TilePagedLOD( _engineUID, _liveTiles, _deadTiles ); plod->setCenter ( bs.center() ); plod->addChild ( tileNode ); plod->setFileName( 1, Stringify() << tileNode->getKey().str() << "." << _engineUID << ".osgearth_engine_mp_tile" );)

计算机图形学重要参考。对理解OpenGL和D3D的渲染过程有重要帮助。(Computer graphics is a vast field that is becoming larger every day. It is impossible to cover every topic of interest, even within a specialization such as CG rendering. For many years, Noriko Kurachi has reported on the latest developments for Japanese readers in her monthly column for CG World. Being something of a pioneer herself, she selected topics that represented original and promising new directions for research. Many of these novel ideas are the topics covered in The Magic of Computer Graphics. Starting the basic behavior of light, the first section of the book introduces the most useful techniques for global and local illumination using geometric descriptions of an environment. The second section goes on to describe image-based techniques that rely on captured data to do their magic. In the final section, the author looks at the synthesis of these two complementary approaches and what they mean for the future of computer graphics.)

三维点云的伪彩色显示示例。自带5片点云用于测试。可平移、旋转、缩放视图；可单色、伪彩色显示点云。(An example of pseudo-color display of three-dimensional point clouds. It has five point clouds for testing. It can translate, rotate and zoom views; it can display point clouds in monochrome and pseudo-color.)

本程序通过光流来对连续的两幅二位图像进行运动估计，非常有效(through the procedures of optical flow to the two consecutive two image motion estimation, a very effective)

VTK里面的对点云进行降采样的程序，可以直接使用。(VTK point cloud inside the down-sampling procedure can be used directly.)

低秩的求解 denoise an image by sparsely representing each block with the already overcomplete trained Dictionary, and averaging the represented parts. Detailed description can be found in "Image Denoising Via Sparse and Redundant representations over Learned Dictionaries(low rankdenoise an image by sparsely representing each block with the already overcomplete trained Dictionary, and averaging the represented parts. Detailed description can be found in "Image Denoising Via Sparse and Redundant representations over Learned Dictionaries)

3D点云拼接,实现旋转平台点云，ICP配准。点云格式ply，标定好旋转轴后实现拼接然后配准(3D point cloud splicing, rotating platform point cloud, ICP registration. Point cloud format ply, after calibrating the rotating axis, realize registration and registration.)

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.)