https://github.com/ZhouJankin/MultiMap3D
安装Pangolin v0.5时报错
**编译ORM-SLAM2包时报错:**error: #error PCL requires C++14 or above
**解决方案:**在ORM-SLAM2包的Cmakelist中添加set( CMAKE_CXX_STANDARD 14),并注释掉其他C++编译器版本选择

**编译ORM-SLAM2包时报错:**error: ‘CVMat’ has not been declared
编译ORM-SLAM2包时报错:error: ‘CV_GRAY2BGR’ was not declared in this scope.
**编译ORM-SLAM2包时报错:**error: ’cvCreateMat’ was not declared in this scope等类似如下报错

编译ORM-SLAM2包时报错:‘CV_REDUCE_SUM’ was not declared in this scope