| ROS Resources: Documentation | Support | Discussion Forum | Index | Service Status | ros @ Robotics Stack Exchange |
Hello,
I'm trying to launch my USB camera, i typed : roslaunch cam-test.launch so my camera is working but i had two warnings:
[ WARN ] : Camera calibration file /home/..../.ros/camera_info/head_camera.yaml not found
[ WARN ] : unknown control 'focus_auto'
These are only warnings so you're camera node should be running okay and publishing images. Have you started RVIZ and tried to view the image topic?
The first warning is caused because you haven't calibrated the camera lens model and linked this into the launch file. If you're not estimating geometry from images then you will not need this anyway. If you need to calibrate the camera this is described here.
The second warning appears to state that your USB camera hardware doesn't support switching between auto and manual focus. I wouldn't worry about this one either.
Asked: 2018-05-04 10:25:03 -0500
Seen: 8,065 times
Last updated: May 04 '18
ROS Answers is licensed under Creative Commons Attribution 3.0 Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.
In my case, the camera image is displayed well although such two warnings happened as above.