recibir_imagen.py

#!/usr/bin/env python
import rospy
from sensor_msgs.msg import Image
from sensor_msgs.msg import CompressedImage
from cv_bridge import CvBridge
import cv2
import numpy as np

# known pump geometry
#  - units are pixels (of half-size image)

def start_node():
    rospy.init_node('camera_subscriber_hd1')
    rospy.loginfo('camera_subscriber_hd1 started')
    rospy.Subscriber("image", Image , process_image)
    rospy.spin()

def process_image(msg):
	#Image

    showImage(CvBridge().imgmsg_to_cv2(msg))
	#CompressedImage
	#np_arr = np.fromstring(msg.data, np.uint8)
        #image_np = cv2.imdecode(np_arr, cv2.IMREAD_COLOR)
        #cv2.imshow('cv_img', image_np)

        # key = cv2.waitKey(1) & 0xFF
        # if key == ord('q'):
        #     cap.release()
        #     cv2.destroyAllWindows()
        
 
        
def showImage(img):
    cv2.imshow('image', img)
    cv2.waitKey(10)
    
    
    
    
if __name__ == '__main__':
    try:
        start_node()
    except rospy.ROSInterruptException:
        pass