参考:
https://github.com/raulmur/ORB_SLAM2/pull/21/commits/4122702ced85b20bd458d0e74624b9610c19f8cc
然后编译
cd /home/jo/workspace/orb_demo/src/ORB_SLAM2 chmod +x build.sh sh build.sh
ORBSLAM2 添加二进制词库
原文：https://www.cnblogs.com/polipolu/p/13192407.html
