I cannot view the image published by usb_cam
In ran the usb_cam node with rosrun usb_cam usb_cam_node
the images are published and i ensured that with rostopic echo /usb_cam/image_raw
but when i tried running rosrun image_view image_view image:=/usb_cam/image_raw
to view the published images a blank (black) window pops up and image is not shown. how to fix it.
I am using ROS Hydro on Ubuntu 12.04 and I don't have this problem with your commands. Have you any warning or error messages ? Is your camera connected to this port : /dev/video0 ?
I'm in the same problem, could you tell me the way to fix this, pls!