基于ROS完成寻迹运动

安装opencv功能包：

$ sudo apt-get install ros-indigo-version-opencv libopencv-dev python-opencv

 检测指示线：

#!/usr/bin/env python
# coding=utf-8

import rospy
from sensor_msgs.msg import Image
import cv2, cv_bridge
import numpy
from geometry_msgs.msg import Twist


class Follower:
    def __init__(self):
        self.bridge = cv_bridge.CvBridge()
        cv2.namedWindow(&#