reference.py 1.18 KiB
#!/usr/bin/env python
from __future__ import print_function
import sys
import rospy
import cv2
from std_msgs.msg import String
from sensor_msgs.msg import Image
from cv_bridge import CvBridge, CvBridgeError
class image_converter:
def __init__(self):
self.image_pub = rospy.Publisher("image_topic_2",Image, queue_size=10)
self.bridge = CvBridge()
self.image_sub = rospy.Subscriber("/camera/color/image_raw",Image,self.callback)
def callback(self,data):
try:
cv_image = self.bridge.imgmsg_to_cv2(data, "bgr8")
except CvBridgeError as e:
print(e)
(rows,cols,channels) = cv_image.shape
if cols > 60 and rows > 60 :
cv2.circle(cv_image, (50,50), 10, 255)
cv2.imshow("Image window", cv_image)
cv2.waitKey(3)
try:
ret_img = self.bridge.cv2_to_imgmsg(cv_image, "bgr8")
ret_img.header = data.header
self.image_pub.publish(ret_img)
except CvBridgeError as e:
print(e)
def main(args):
ic = image_converter()
rospy.init_node('image_converter', anonymous=True)
try:
rospy.spin()
except KeyboardInterrupt:
print("Shutting down")
cv2.destroyAllWindows()
if __name__ == '__main__':
main(sys.argv)