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How to decrompress compressed image topic??

asked 2021-06-05 12:43:39 -0600

Ifx13 gravatar image

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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answered 2021-06-07 10:01:54 -0600

JackB gravatar image

updated 2021-06-07 10:02:06 -0600

Listen to what the error says and instead try:

 rosrun image_transport republish compressed in:=/D435/color/image_raw  raw out:=/D435/color/image_raw
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Thank you for your solution.

Ifx13 gravatar image Ifx13  ( 2021-06-08 01:02:16 -0600 )edit

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Asked: 2021-06-05 12:43:39 -0600

Seen: 125 times

Last updated: Jun 07