The codes copy from https://github.com/ros-perception/vision_opencv.
This version of cv_bridge depends on opencv2, the newest version depends on opencv3,but i still use opencv2, so i just keep this version as a preemergency.
YoungRainy/cv_bridge2
This version of cv_bridge depends on opencv2,the newest version depends on opencv3,but i still usd opencv2,so i keep this version as a preemergency.