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How can additional nodelets be attached to the stereo_image_proc's nodelet manager in Diamondback?

asked 2011-05-05 14:01:11 -0500

updated 2011-05-12 08:51:47 -0500

I'd like to add in image processing attached to the points2 and disparity output of stereo_image_proc, but can't figure out how to either get the stereo_image_proc stack nodelets to attach to my nodelet manager or attach to theirs.

Attempting to load nodelets using stereo_image_proc fails.

And the configuration done inside of stereo_image_proc is complex and done programmatically as work around to a topic remapping problem, and so I was unable to rebuild stereo_image_proc's elements:

  • image_proc/rect
  • stereo_image/disparity
  • stereo_image_proc/point_cloud2

... into the same functionality using simply a launch file which had a nodelet manager I could attach to.

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answered 2011-05-05 14:07:18 -0500

It appears the stereo_image_proc's nodelet manager is created with the nodelet manager API turned off which prevents other nodelets from being attached to it.

My work around was to copy stereo_image_proc.cpp to my own package, and modifying the constructor call to enable the nodelet manager API:

nodelet::Loader manager(true); // was false

It's then possible to attach additional nodelets to this modified stereo_image_proc though be careful not to try to name the resulting node executable as stereo_image_proc as this will collide since stereo_image_proc will need to be a dependency of your package.

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Yeah, I'd file a ticket, but I've heard that it won't be done programmatically in the next release so it won't matter any more. Not sure why anyone ever sets that to false; perceived cleanliness I suppose.
Asomerville gravatar image Asomerville  ( 2011-05-05 15:58:43 -0500 )edit

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Asked: 2011-05-05 14:01:11 -0500

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Last updated: May 12 '11