liumz

应该没有，我理解的MN3表示的是将图片二中的遗漏点映射到图片1的最后一个点索引+1的位置，所以MN3和MN2构造是相反的才对

ROS1 depends on python2.7, then your env is python3. I solve this by reinstalling roslz4 to python3. 1. delete roslz4 in `/opt/ros/xxx/lib/python2.7/site-packages` 2. downlaod roslz4 from `https://rospypi.github.io/simple` 3. pip install