dkst's profile - activity

Hi all, the ROS opencv packge (opencv2) does not build the video interface options - we took this decision early because of the fragility of the OpenCV video capture and I/O code.

In use this tends not to be a problem because we usually source images via ROS, and use cv_bridge to import images (or sequences of images for video) into OpenCV.

Could you check it on rviz? rosrun rviz rviz. If it works there, then its not the problem with the laser.

I suspect that you may not be subscribing to the right topic title. From my experience with hokuyo, I think that the correct topic title is "/scan" not "scan".

Hi all, I recently updated my diamondback version to the latest version and I realised that my packages that I had written previously that used OpenCV's VideoCapture (webcam) fail to work. That is the code:

cv::VideoCapture capture;

capture.open(0);

always returns FALSE. When I compile the latest OpenCV 2.2 library outside the ROS framework and run it, my web cam is always initialised properly so I know its not a problem with OpenCV. My webcam works fine with Cheese as well so it's not at fault too. I am running Ubuntu 10.04 LTS with a full clean install of ROS Diamondback with the required vision-opencv stacks.

Has anyone else had the same experience? Or does anyone have any advice for me to take?

Thanks.