always waiting for image

[rcpilotp51]

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.

[saipraneethd-zz]

I am facing the same issue. Did you find any fix to the problem?

[albertogiacomini]

If you are running on multiple machines pay attention they are working on the same network

[saipraneethd-zz]

I can see the topic /camera/image_raw in rostopic list and I also checked rostopic echo /camera/image_raw. I also changed ros.yaml to subscribe to /camera/image_raw. The darknet_ros is still "Waiting for image". I am using Ubuntu bash on windows.

[albertogiacomini]

My error was given by the wrong setup of the variables $ROS_IP and $ROS_MASTER_URI. So I just set them and everything was working. Check also with rosnode list if both nodes appear. Or try to follow this guide: https://wiki.ros.org/ROS/NetworkSetup

[CDRE-LXIV]

I got around this by using cv_camera instead of darknet_ros's default node. I installed and ran cv_camera, then changed the camera topic in darknet_ros's ros.yaml to "topic: /cv_camera/image_raw". After that I launched darket_ros's yolo node and everything worked fine.

[YangSiri]

Hi, we share the same issue. Should we change the codes below in src/YoloObjectDetector.cpp ?

_nodeHandle.param("subscribers/camera_reading/topic", cameraTopicName, std::string("/camera/imageraw")); nodeHandle.param("subscribers/camera_reading/queuesize", cameraQueueSize, 1); nodeHandle.param("publishers/object_detector/topic", objectDetectorTopicName, std::string("foundobject")); nodeHandle.param("publishers/object_detector/queuesize", objectDetectorQueueSize, 1); nodeHandle.param("publishers/objectdetector/latch", objectDetectorLatch, false); nodeHandle.param("publishers/bounding_boxes/topic", boundingBoxesTopicName, std::string("boundingboxes")); nodeHandle.param("publishers/bounding_boxes/queuesize", boundingBoxesQueueSize, 1); nodeHandle.param("publishers/boundingboxes/latch", boundingBoxesLatch, false); nodeHandle.param("publishers/detection_image/topic", detectionImageTopicName, std::string("detectionimage")); nodeHandle.param("publishers/detection_image/queuesize", detectionImageQueueSize, 1); nodeHandle.param("publishers/detectionimage/latch", detectionImageLatch, true);

imageSubscriber = imageTransport_.subscribe(cameraTopicName, cameraQueueSize, &YoloObjectDetector::cameraCallback, this);__

And , hi, @CDRE-LXIV could you explain more about the cv_camera?

Looking forward to your help. THANKS

[CDRE-LXIV]

I installed the ROS package cv_camera (link: http://wiki.ros.org/cv_camera), which I run using "rosrun cv_camera cv_camera_node". That publishes several topics, the one we want is: "/cv_camera/image_raw".

I edited two files in darknet_ros:
1.) In the launch folder, open darket_ros.launch: change the existing camera topic:
arg name="image" default="/camera/rgb/image_raw" / to arg name="image" default="/cv_camera/image_raw" /

2.) In the config folder, open ros.yaml: change the camera reading topic to: topic: /cv_camera/image_raw

Now if you launch darknet_ros using darket_ros.launch it should look for the image topic created by the cv_camera package instead. Good luck!

[YangSiri]

THANKS @CDRE-LXIV I'm gonna try.

[xiaofeiii]

Hello, I encountered the same problem, I use the csi camera on jetsonnano, but it keeps showing waiting for image

[Gaurav37]

I installed the ROS package cv_camera (link: http://wiki.ros.org/cv_camera), which I run using "rosrun cv_camera cv_camera_node". That publishes several topics, the one we want is: "/cv_camera/image_raw".

I edited two files in darknet_ros: 1.) In the launch folder, open darket_ros.launch: change the existing camera topic: arg name="image" default="/camera/rgb/image_raw" / to arg name="image" default="/cv_camera/image_raw" /

2.) In the config folder, open ros.yaml: change the camera reading topic to: topic: /cv_camera/image_raw

Now if you launch darknet_ros using darket_ros.launch it should look for the image topic created by the cv_camera package instead. Good luck!

This works with usb_cam also. Running, roslaunch usb_cam usb_cam-test.launch and then it tells me image location to be /usb_cam/image_raw and updated same in arg name in darknet_ros.launch and camera_reading: topic: /usb_cam/image_raw #/camera/rgb/image_raw in ros.yaml in darknet_ros/darknet_ros/config/ folder. Then roslaunch darknet_ros darknet_ros.launch and works perfetctly. Its slow on cpu though!

[AnukritiSinghh]

@rcpilotp51 hey I am very new to this. Can you please help me how do you view images in rviz? Also I tried updating the camera reading topic but I still face the same problem

[Albert337]

I installed the ROS package cv_camera (link: http://wiki.ros.org/cv_camera), which I run using "rosrun cv_camera cv_camera_node". That publishes several topics, the one we want is: "/cv_camera/image_raw". I edited two files in darknet_ros: 1.) In the launch folder, open darket_ros.launch: change the existing camera topic: arg name="image" default="/camera/rgb/image_raw" / to arg name="image" default="/cv_camera/image_raw" / 2.) In the config folder, open ros.yaml: change the camera reading topic to: topic: /cv_camera/image_raw Now if you launch darknet_ros using darket_ros.launch it should look for the image topic created by the cv_camera package instead. Good luck!

This works with usb_cam also. Running, roslaunch usb_cam usb_cam-test.launch and then it tells me image location to be /usb_cam/image_raw and updated same in arg name in darknet_ros.launch and camera_reading: topic: /usb_cam/image_raw #/camera/rgb/image_raw in ros.yaml in darknet_ros/darknet_ros/config/ folder. Then roslaunch darknet_ros darknet_ros.launch and works perfetctly. Its slow on cpu though!

I tried to use cv_camera or usb_cam bag, and i fixed the code as instructions, but the error still occured which is "waiting for image" and nothing shows.Is there any other ideas to slove it? thanks!

[adhilcodes]

(1) How I solved the issue is, I installed the usb_cam module and updated my ros.yaml file as below (2) Also update your darknet_ros.launch file with topic: /usb_cam/image_raw

`subscribers:

camera_reading: topic: /usb_cam/image_raw queue_size: 1

actions:

camera_reading: name: /darknet_ros/check_for_objects

publishers:

object_detector: topic: /darknet_ros/found_object queue_size: 1 latch: false

bounding_boxes: topic: /darknet_ros/bounding_boxes queue_size: 1 latch: false

detection_image: topic: /darknet_ros/detection_image queue_size: 1 latch: true

image_view:

enable_opencv: true wait_key_delay: 1 enable_console_output: true`

[imertyuz]

I installed the ROS package cv_camera (link: http://wiki.ros.org/cv_camera), which I run using "rosrun cv_camera cv_camera_node". That publishes several topics, the one we want is: "/cv_camera/image_raw". I edited two files in darknet_ros: 1.) In the launch folder, open darket_ros.launch: change the existing camera topic: arg name="image" default="/camera/rgb/image_raw" / to arg name="image" default="/cv_camera/image_raw" / 2.) In the config folder, open ros.yaml: change the camera reading topic to: topic: /cv_camera/image_raw Now if you launch darknet_ros using darket_ros.launch it should look for the image topic created by the cv_camera package instead. Good luck!

This works with usb_cam also. Running, roslaunch usb_cam usb_cam-test.launch and then it tells me image location to be /usb_cam/image_raw and updated same in arg name in darknet_ros.launch and camera_reading: topic: /usb_cam/image_raw #/camera/rgb/image_raw in ros.yaml in darknet_ros/darknet_ros/config/ folder. Then roslaunch darknet_ros darknet_ros.launch and works perfetctly. Its slow on cpu though!

I tried to use cv_camera or usb_cam bag, and i fixed the code as instructions, but the error still occured which is "waiting for image" and nothing shows.Is there any other ideas to slove it? thanks!

I have same issue. What should I do ? Thanks.

[imertyuz]

I installed the ROS package cv_camera (link: http://wiki.ros.org/cv_camera), which I run using "rosrun cv_camera cv_camera_node". That publishes several topics, the one we want is: "/cv_camera/image_raw". I edited two files in darknet_ros: 1.) In the launch folder, open darket_ros.launch: change the existing camera topic: arg name="image" default="/camera/rgb/image_raw" / to arg name="image" default="/cv_camera/image_raw" / 2.) In the config folder, open ros.yaml: change the camera reading topic to: topic: /cv_camera/image_raw Now if you launch darknet_ros using darket_ros.launch it should look for the image topic created by the cv_camera package instead. Good luck!

This works with usb_cam also. Running, roslaunch usb_cam usb_cam-test.launch and then it tells me image location to be /usb_cam/image_raw and updated same in arg name in darknet_ros.launch and camera_reading: topic: /usb_cam/image_raw #/camera/rgb/image_raw in ros.yaml in darknet_ros/darknet_ros/config/ folder. Then roslaunch darknet_ros darknet_ros.launch and works perfetctly. Its slow on cpu though!

I tried to use cv_camera or usb_cam bag, and i fixed the code as instructions, but the error still occured which is "waiting for image" and nothing shows.Is there any other ideas to slove it? thanks!

I have same issue. What should I do ? Thanks.

Hi. I solved my problem. I am using realsense D435i camera. I changed topic : "/camera/color/image_raw/". It worked