Image Transport Compressed issue for Depth Image - ROS Fuerte

Question

Hi, I am using Depth Image for one of my applications, where I need to use compressed image transport for some server/client app. If I use param -> "_image_transport:=raw", everything works fine, but if I use "compressed" instead of "raw", then the depth values that I get are not similar.

I am using "/camera/depth/image_raw" topic and converting the image into "16UC1" format using cv_bridge. Then I access the depth values using a Mat and type "ushort".

Is there some issue with the format of image that I need to change for accessing the depth values for compressed image transport?

Thanks in advance! Sourav

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Originally posted by Sourav on ROS Answers with karma: 16 on 2013-05-22

Post score: 0

Answer 1

Solution: The default compression algorithm is "jpeg" which should be changed to "png" in case of depth image. This can be done by changing the "format" parameter for that topic(/image_transport_type).

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Originally posted by Sourav with karma: 16 on 2013-05-27

This answer was ACCEPTED on the original site

Post score: 0