Eigen3.2.8为矩阵计算工具，需要编译后才能运行，在官网找了很久，发现没有这个版本了，然后上传一份，方便后面有需要的人使用，可以在openCV、PCL等库中应用
Eigen3.2.8 for the matrix calculation tool, you need to compile to run, in the official website to find a long time, found that there is no such version, and then upload a, to facilitate the use of people behind the need, you can openCV, PCL and other libraries (2017-03-21, MultiPlatform, 2223KB, 下载5次)