Hi , I wanted to know what the camera frames corresponding to the PR-2 are? The PR-2 at Upenn publishes narrow_stereo_gazebo_l_stereo_camera_frame and similar ones for the right, and wide stereo pair. Is this the valid camera frame? Also the _stereo_camera_optical_frame(gazebo version). Is it pixel co-ordinates? I'm confused . Can someone point me in the right direction? Bharath Sankaran Research Assistant GRASP Lab, University of Pennsylvania