How do you config Darknet_Ros (yolo) to see a camera topic?

asked 2019-02-11 08:48:08 -0500

cerebraldad gravatar image

I have yolo running on a server and the robot publishing a usb camera topic /usb_cam/image_raw - i am able to see the image in rviz, but I get a continuous "waiting for image" message from the darknet_ros package after i configure the ros.yml file to subscribe to the same topic. I tried running all the launch files with no success. Im not using a GPU, yet - I was just testing with a CPU but it cant seem to subscribe to the image topic.

Thanks for your help. The git repo doesn't seem to be responding to issues.

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I would recommend using rosnode info <node_name> on both yolo and the camera node, to confirm they are on the same topic and namespace.

PeteBlackerThe3rd gravatar image PeteBlackerThe3rd  ( 2019-02-11 09:42:29 -0500 )edit

@PeteBlackerThe3rdrosnode info /usb_cam shows no subscribers: Subscriptions: None but /darknet_ros shows /usb_cam/image_raw [sensor_msgs/Image] in subscriptions

cerebraldad gravatar image cerebraldad  ( 2019-02-12 11:54:11 -0500 )edit

/usb_cam and /usb_cam/image_raw are different topic names. You will have to remap the topic on one of these nodes so that they are connected.

PeteBlackerThe3rd gravatar image PeteBlackerThe3rd  ( 2019-02-12 12:18:20 -0500 )edit

you said rosnode above. I'm confused.

cerebraldad gravatar image cerebraldad  ( 2019-02-12 14:57:56 -0500 )edit