text: #!/usr/bin/env python
  import rospy
  import cv2
  from std_msgs.msg import String
  from sensor_msgs.msg import Image
  from cv_bridge import CvBridge, CvBridgeError
  import numpy as np 
  import imutils
  
  
  class ImageListener:
  
      #define the constructor 
      def __init__(self,racecar_name):
          self.cv_bridge=CvBridge()
  
          self.image_topic=str(racecar_name)+'/camera/zed/rgb/image_rect_color'
  
      #image callback
      def image_callback(self,ros_image):
          #convert the ros_image to an openCV image
          try:
              cv_image=self.cv_bridge.imgmsg_to_cv2(ros_image,"bgr8")
              print(cv_image.shape)
          except CvBridgeError as e:
              print(e)
          cv2.imshow(self.image_topic,cv_image)
          cv2.waitKey(3)
          #img = cv2.resize(cv_image,(224,224),interpolation=cv2.INTER_AREA)
          cv_image= imutils.resize(cv_image,width=200)
          print(cv_image.shape)
          cv2.imshow('224 x 224 topic',cv_image)
          cv2.waitKey(3)
          
  
  
  if __name__=='__main__':
      rospy.init_node("image_listener",anonymous=True)
      #get the arguments passed from the launch file
      args = rospy.myargv()[1:]
      racecar_name=args[0]
      il=ImageListener(racecar_name)
      image_sub=rospy.Subscriber(il.image_topic,Image,il.image_callback)
      try: 
          rospy.spin()
      except KeyboardInterrupt:
          print("Shutting Down")
      cv2.destroyAllWindows()
  