用opencv3.1.0做ORBSLAM2運行一下命令時
cd ORB_SLAM2
chmod +x build.sh
./build.sh
出錯：/usr/bin/ld: CMakeFiles/mono_tum.dir/Examples/Monocular/mono_tum.cc.o: undefined reference to symbol '_ZN2cv6String10deallocateEv'
/usr/local/lib/libopencv_core.so.3.1: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
解決辦法：因為該ＯＲＢＳＬＡＭ２程序時用ＯＰＥＮＣＶ2.4.Ｘ寫的，所以用opencv3.1.0時要改一下依賴包
具體做法：Instead of installing opencv again, just edit the cmakelists.txt (all) and remove version number written i.e. 2.4 from the OPENCV REQUIRED line.
即將ORBSLAM2文件夾下的CMakeLists.txt中的find_package(OpenCV 2.4.3 REQUIRED)改寫成find_package(OpenCV 3.0.0 REQUIRED)，再運行
./build.sh
即可．
