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https://www.youtube.com/watch?v=HdJarMRYNJU

our velodyne use driver -> https://github.com/ros-drivers/velodyne

and i dont know why shadow occured what should i do?


Originally posted by dnjsxor564 on ROS Answers with karma: 11 on 2018-03-21

Post score: 1


Original comments

Comment by stevejp on 2018-03-21:
It might be useful if you could post a bag file.

Comment by dnjsxor564 on 2018-03-21:
oh thx but how to upload bag file?

Comment by M@t on 2018-03-22:
Upload it to something like Google Drive or Dropbox, then post a link here

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I'm using the same drivers and I experience the same phenomena with the HDL-32. However, if you save the point cloud, e.g. with...

$ rosrun pcl_ros pointcloud_to_pcd input:=/velodyne_points 

...you should see that the full point cloud without the shadow. In addition, if you record the data and then play it back with rosbag, you shouldn't see the shadow but you may still see a "ripple" effect that rotates around the cloud in the same way.

I think that the problem is related to how RViz displays or refreshes point clouds in it's visual display. As far as I can tell it doesn't seem to adversely affect the point cloud in any way.


Originally posted by M@t with karma: 2327 on 2018-03-21

This answer was ACCEPTED on the original site

Post score: 2


Original comments

Comment by dnjsxor564 on 2018-03-21:
i use bag file but i still can see shadow.. if u check my bagfile? and check shadow occured? if u can help me i give my bagfile, please tell me your email thx.

Comment by M@t on 2018-03-22:
Hmmm... that's odd. It would be best if you could upload a sample bag file to something like Google Drive or Dropbox and then post a link to it in your question. Then everyone can see it and take a look.

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