Attention: Answers.ros.org is deprecated as of August the 11th, 2023. Please visit robotics.stackexchange.com to ask a new question. This site will remain online in read-only mode during the transition and into the foreseeable future. Selected questions and answers have been migrated, and redirects have been put in place to direct users to the corresponding questions on Robotics Stack Exchange. Additional details are available here.

image tracking node python

asked 2018-09-12 10:39:45 -0500

Spyros
51 ●23 ●26 ●33

I am using Ubuntu 16.04, ROS Kinetic and Python 2.7.12. I want to run a complicated code in python, which can read an avi document frame by frame, apply some filters, and export three csv documents and one new avi document. I am new in ROS and I am not sure how exactly is going to be. Can I make it only by creating a publisher node in Python? Do I have to publish in a different topic in the same node, for every different type of my data? (for example avi anf csv documents) Any possible solution or a guideline would be appreciated.

edit retag flag offensive close merge delete

Comments

If you are just reading and writing to avi and csv, why do you need ROS ?

Choco93 ( 2018-09-13 01:54:06 -0500 )edit

This will be a part of a bigger project, which will combine different applications controlled under a common platform (ROS)

Spyros ( 2018-09-13 06:45:03 -0500 )edit

add a comment

1 Answer

Sort by » oldest newest most voted

answered 2018-09-13 07:04:16 -0500

PeteBlackerThe3rd

flag of United Kingdom of Great Britain and Northern Ireland

9529 ●30 ●143 ●135 https://www.linkedin.c...

You'll want to use OpenCV for reading the video, processing it and writing the new video to a file. This can be integrated well with ROS later because it has very close integration with OpenCV.

If you want to store the output of your code in files then you do not want to use any ROS publishers or ROS at all, they would simply publish data to other nodes not store it in specific file types.

These tutorials show you how to read and save a video file. Weather this works with your AVI file will depend on the exact video codec used.

If you're using numpy to process arrays then you can save the CSV files simply using the numpy.savetxt function as below

numpy.savetxt('myfile.csv', my_numpy_array, delimiter=',')

Hope this gets you started.

edit flag offensive delete link

add a comment

Question Tools

1 follower

Stats

Asked: 2018-09-12 10:39:45 -0500

Seen: 156 times

Last updated: Sep 13 '18

image tracking node python edit

Comments

1 Answer

Question Tools

Stats

Related questions

image tracking node python