Isaac_ros_detectnet can not get properly results

Robotics & Edge Computing Robotics - Isaac Isaac ROS
1

Hi,
When I try isaac_ros_detectnet(isaac_ros_detectnet — isaac_ros_docs documentation) and use RealSense camera I can not get rqt img result as quickstart. And rqt like:

rqt_scs
rqt_scs2560×1440 339 KB

And here is some key command log:
ros2 run isaac_ros_detectnet setup_model.sh --height 480 --width 640 --config-file realsense_config.pbtxt:
log.txt (134.9 KB)
ros2 launch isaac_ros_examples isaac_ros_examples.launch.py launch_fragments:=realsense_mono_rect,detectnet:
log1.txt (30.0 KB)

2

Hi @lzjie ,

According to the log1.txt, the realsense node is not loaded successfully:

[ERROR] [launch_ros.actions.load_composable_nodes]: Failed to load node 'realsense2_camera' of type 'realsense2_camera::RealSenseNodeFactory' in container '/isaac_ros_examples/container': Could not find requested resource in ament index

Could you please ran “source install/setch.bash” inside the container to source the workspac and check it again?
Please let us know if it helps, thank you.

3

Hi,
Thanks for your advice.
realsense2_camera node can works now.And I had confirmed that my cam is working:

cam
cam652×569 176 KB

However, I still can not get processed img,it is still blank.
Here is log:
log2.txt (56.3 KB)

4

Hi @lzjie ,

Are you using JP6.0(+Isaac ROS 3.1) or JP6.2(+Isaac ROS 3.2)?
Did you run the command “ros2 run rqt_image_view rqt_image_view /detectnet_processed_image” to visualize the output?
( Please refer to isaac_ros_detectnet — isaac_ros_docs documentation )

According to your attached picture, looks it’s using the wrong image view.
Please help to change the upper left corner box from “/color/image_raw/compressed” to “/detectnet_processed_image” to see if it works.
Thank you.

5

Hi,
I am using JP6.0(+Isaac ROS 3.1).
I just want to use that pic indicate that my cam can normally captured images.
When I change to /detectnet_processed_image,it is still blank like before.

6

Hi @lzjie ,

Thanks for your quick update.
I took a moment to verify this sample on my end and everything works fine.
Could you please help to check the Realsense firmware version is matched to the requirement( v.5.13.0.50) and try it again?

It is required to use RealSense firmware version 5.13.0.50, librealsense version 2.55.1 and RealSense camera ROS driver version 4.51.1. Any deviation from these versions will break Isaac ROS examples.

Thank you.

7

Hi,
OK.I will check my all steps again.
Thank you so much.

8

Hi @nvidia_user_1234 Team,

I’m also facing the same issue as described in this thread when using Isaac ROS DetectNet.

🔧 System Setup:
[list]
JetPack Version: 6.2
Isaac ROS Version: release-3.2
Platform: Jetson Orin NX
Sensor: Intel RealSense D435i
Firmware Version: 5.13.0.50

🧪 Issue:
The pipeline launches successfully without any critical errors.
However, the /detections topic from detectnet_decoder_node is either empty or not publishing proper detection results.
The image stream from the D435i camera is valid and visible on /image_rect.

✅ What I’ve Tried:
Verified camera feed and camera_info topics via rqt_image_view and [code]ros2

image
image1037×797 31.7 KB

image
image1033×762 63.6 KB

rosgraph
rosgraph1920×139 23.9 KB

image
image1256×772 64.5 KB

Thanks in advance for your support!

— Abhishek

9

Hi @chaud324 ,

Thanks for your post.
Somehow the attached rosgraph is with bad resolution, and we can see there are no data sent to /detectnet in attached image.
Could you please provide the clear picture of rqt_graph and execution logs?
Thanks.

10

Hello,

As there haven’t been any recent updates on this discussion, we’ll be closing the thread to keep the forum organized.

If you continue to experience this issue or have new questions, please start a new topic and include a reference to this discussion for context. This will help our team and other community members assist you more effectively.

Thank you for your participation in the NVIDIA Isaac ROS community.