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OpenCV program doesnt start the camera

asked 2012-04-17 06:57:18 -0500

DavidLavy gravatar image

Hi, I recently installed ROS Electric, and now I'm trying to use OpenCV with it, I followed certain tutorials as this one Working with ROS and OpenCV (no sure if anyone else tried this too) ... Thing is, my built-in camera worked fine when i launch this .launch program:

<launch> <node name="uvc_cam_node" pkg="uvc_cam" type="uvc_cam_node" output="screen"> </node> </launch> (Refer to the part Test the launch script in the link above)

It does turn on, and writing this in terminal $ rosrun image_view image_view image:=/camera/image_raw I can see the image, but when I write my .cpp program for using OpenCV and I run it (refer to the part Write the code for image processing), my camera doesn't turn on, it doesnt show an error or anything it just stays there ... I have tried w another webcams and same thing happened. Does anyone have a clue why isn't running

Thanks

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answered 2012-04-17 15:00:12 -0500

Kevin gravatar image

You still have to run uvc_cam node.

The code you are talking about uses image transport in another node to grab the images from the ucv_cam node and process them. These are two different nodes working together ... one to grab images from your camera and one to process them.

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answered 2012-04-17 19:07:06 -0500

DavidLavy gravatar image

Thank you! It worked, in the morning when i was checking the code i was actually wondering when it grabs the image from the camera, cause i havent seen that in the code, and this answered that question and solved my problem. (:

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Asked: 2012-04-17 06:57:18 -0500

Seen: 458 times

Last updated: Apr 17 '12