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2023-02-16 09:49:58 -0500 marked best answer Should I unregister from Publishers/Subscribers when I terminate a ROS node by exiting the script?

Hi everyone.

So my question is pretty much what the title is. Is it good practice or even necessary to unregister from ROS publishers or subscribers I used inside my ROS node before terminating the node from the script?

Is there any difference if my ROS node is written in python or c++?

Thanks in advance.

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2023-02-07 04:06:39 -0500 asked a question ROS2 humble in docker with ROS1 Noetic in host machine communication issues.

ROS2 humble in docker with ROS1 Noetic in host machine communication issues. Hello everyone. I am trying to use isaac_r

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2023-01-20 07:15:42 -0500 answered a question Merge multiple pcd files.....

I would suggest using the open3D python library, you can read pointclouds of many formats and then concatenate them in a

2023-01-20 06:47:05 -0500 asked a question Should I unregister from Publishers/Subscribers when I terminate a ROS node by exiting the script?

Should I unregister from Publishers/Subscribers when I terminate a ROS node by exiting the script? Hi everyone. So my q

2023-01-17 05:01:18 -0500 marked best answer How to decompress compressed image topic?

Hello people,

I have a question on how to decompress image topics. I have a /D435/color/image_raw/compressed image and I am interested in decompressing it and get a new /D435/color/image_raw topic. My search led me to the image_transport package but probably I am not using it correctly. I am interested in using the nodes it has because I have 0 knowledge of cpp and I can not use the api. So far I've tried this and I got the following warning.

rosrun image_transport republish compressed in:=/D435/color/image_raw/compressed  raw out:=/D435/color/image_raw

[ WARN] [1622914313.899141980]: [image_transport] It looks like you are trying to subscribe directly to a transport-specific image topic '/D435/color/image_raw/compressed', in which case you will likely get a connection error. Try subscribing to the base topic '/D435/color/image_raw' instead with parameter ~image_transport set to 'compressed' (on the command line, _image_transport:=compressed). See http://ros.org/wiki/image_transport for details.

Any idea how to cope with this or any other way to do it?? Thank you in advance.

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2022-09-19 17:53:52 -0500 marked best answer extrinsic calibration of non-overlapping cameras

Hello everyone,

does anybody have any idea how to calculate the relative transformation between the cameras of a multi camera rig with no overlap?

Thanks in advance.

2022-09-19 17:49:22 -0500 marked best answer how to understand image topic frame orientation?

Hello everyone,

as the title says, I want to ask how to figure out how the frame orientation of an image is set, any ideas ?

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2022-03-10 07:35:50 -0500 asked a question Adding a python node to an existing ROS package.

Adding a python node to an existing ROS package. Hello everyone, As the title says, I am interested in adding a node to

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2022-01-19 03:33:15 -0500 commented answer How to use image_proc/crop_decimate to crop an image?

Thanks, I think this should be marked as the answer

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2022-01-12 02:41:56 -0500 commented question How to project PointCloud2 points to image plane with known transformations.

@tfoote My intentions were not to ask for code; I'm sorry If that was how it appeared, I did not want to focus on the co

2022-01-12 02:37:47 -0500 edited question How to project PointCloud2 points to image plane with known transformations.

How to project PointCloud2 points to image plane with known transformations. Hello everyone, as the title says, I have

2022-01-11 08:54:03 -0500 asked a question How to project PointCloud2 points to image plane with known transformations.

How to project PointCloud2 points to image plane with known transformations. Hello everyone, as the title says, I have

2021-12-21 03:22:35 -0500 commented question How to terminate the excecution of a launch file if a node is not active?

@gvdhoorn thanks, this is exactly what I wanted to do. I am sorry for creating a duplicate.