Hello !
I want to have a value to be returned when I call a callback function while subscribing to a topic. I am using ROS-Hydro
I have wrote a demo code that what I want. Please also suggest some new way to achieve this if callback function can't return anything !
def bridge_opencv():
image_pub = rospy.Publisher("quadrotor/videocamera1/camera_info",Image)
cv2.namedWindow("Image window", 1)
image_sub = rospy.Subscriber("quadrotor/videocamera1/image",Image, callback)
get value of y from callback function when it is returning
y = z
return z
def callback(data):
bridge = CvBridge()
try:
cv_image = bridge.imgmsg_to_cv2(data, "bgr8")
except CvBridgeError, 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)
return y
def my_function()
x=cv_bridge()
if x = 1:
return "true"
else:
perform the task
def pilot():
rospy.init_node("pilot")
my_value = my_function()
if my_value = true:
stop everything...
else: do the above process again
rospy.spin()
if __name__ == '__main__':
pilot()
Thanks a lot !
Looking forward for answers !
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