import rospy
from pyzbar import pyzbar
from cv_bridge import CvBridge
from sensor_msgs.msg import Image

bridge = CvBridge()

rospy.init_node('barcode_test')

# Image subscriber callback function
def image_callback(data):
    cv_image = bridge.imgmsg_to_cv2(data, 'bgr8')  # OpenCV image
    barcodes = pyzbar.decode(cv_image)
    for barcode in barcodes:
        b_data = barcode.data.encode("utf-8")
        b_type = barcode.type
        (x, y, w, h) = barcode.rect
        xc = x + w/2
        yc = y + h/2
        print ("Found {} with data {} with center at x={}, y={}".format(b_type, b_data, xc, yc))

image_sub = rospy.Subscriber('main_camera/image_raw', Image, image_callback, queue_size=1)

rospy.spin()