ROS ubuntu18.04 cv_bridge python3配置 opencv4.4.0

一、cv_bridge官方文档

http://wiki.ros.org/cv_bridge/Tutorials/ConvertingBetweenROSImagesAndOpenCVImagesPython
调用方式：

from cv_bridge import CvBridge
bridge = CvBridge()
# opencv图像转换为sensor_msgs/Image图像
image_message = bridge.cv2_to_imgmsg(cv_image, encoding="bgr8")
# 把sensor_msgs/Image图像转换为opencv图像
cv_image = bridge.imgmsg_to_cv2(image_message, desired_encoding='bgr8')

二、python3.6配置

2.1 依赖包安装

sudo apt-get install python-catkin-tools python3-dev python3-catkin-pkg-modules python3-numpy python3-yaml ros-melodic-cv-bridge

2.2 创建工作空间

cd ~ && mkdir cv_bridge_ws

2.3 初始化工作空间

注：出现的红色警告不用管

cd cv_bridge_ws &&am