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2014-12-15 17:36:12 -0500 commented answer camera_info override

I've been using an android app (which doesn't appear to be on the store anymore), basically it was missing some information in the topics published that prevented other nodes that would consume camera data to function properly. I was curious if I could manually fake this data.

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2014-10-02 18:02:04 -0500 asked a question camera_info override

Hi! I've been using an android app to pipe the camera image into ROS.

This works moderately well, even though there is some lag to get the image.

The problem is that the published /camera/camera_info is all empty. (see below)

Is there a way I can override the camera_info topic with the calibration data I've gathered, and bypass what the AndroidCameraViewer driver reports ?

Thank you

Output of :

$ rostopic echo /camera/camera_info 

  seq: 7485
    secs: 1412290798
    nsecs: 453000000
  frame_id: camera
height: 960
width: 1280
distortion_model: ''
D: []
K: [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
R: [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
P: [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
binning_x: 0
binning_y: 0
  x_offset: 0
  y_offset: 0
  height: 0
  width: 0
  do_rectify: False
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2013-11-07 14:33:22 -0500 commented answer Replacing base ubuntu ros packages with mine compiled from source

Did you call $ source /path/to/catkin/devel/setup.bash ? It should setup catkin as the first thing in you ROS_PACKAGE_PATH env variable.

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2013-11-05 20:00:44 -0500 answered a question Replacing base ubuntu ros packages with mine compiled from source

Ok it seems that using catkin it was as simple as :

cloning the repo of roscpp into catkin/src and then doing catkin_make

Conveniently catkin seems to export a LD_LIBRARY_PATH so that the library compiled in catkin take precedence over the rest of ros.

2013-11-05 05:54:46 -0500 asked a question Replacing base ubuntu ros packages with mine compiled from source


I'm using ros groovy on armv7l, and I'm getting a bus error from from roscpp_serialization.

The error is well documented (on this forum too) and It seems that there is a patch that fixes it, but it hasn't made it into my ubuntu packages yet. And I can't find a way to replace this package in my ros build.

If I try to apt-get remove ros-groovy-roscpp-serialization, based on dependencies almost all of ros-groovy-* will be removed.

Is there a way to supersede binary packages with compiled ones ?

Thank you

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2013-09-26 07:46:32 -0500 asked a question catkin optional build dependency

I'm trying to compile hector_quadrotor using catkin_make, but I'm running into this issue :

The main problem is that hector_pose_estimation uses the hector_uav_msgs package only if it is available at build time (by find_package).

But hector_pose_estimation is usable without hector_uav_msgs, so it can't be a build dependency.

And because hector_uav_msgs is not a build dep of hector_pose_estimation, catkin_make will try to build hector_pose_estimation before hector_uav_msgs.

Is there a trick to declare optional build dependencies, or to force the dependency to build hector_uav_msgs prior to hector_pose_estimation ?