Hi Homer, You are just awesome. It is working fine. I took '/' as namespace. Thanks for your reply. Now i am getting the disparity image. abhy -- View this message in context: http://ros-users.122217.n3.nabble.com/uvc-camera-and-stereo-proc-tp2451433p2456856.html Sent from the ROS-Users mailing list archive at Nabble.com.