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2019-05-20 02:10:02 -0500 | marked best answer | Minimum time between publishing a joint state and tf listener update Hi, I have 8 laser range finders propped up on a rotating vertical rod connected to a motor. The laser range finders is fixed to the sides of the rod at some 'xyz rpy' pose. I get the current angular position of the rod and use this to publish the joint state of the rod (which is free to rotate along the z axis). So when the motor runs in real world i can see the vertical rod and the lidar attached to it rotate as well in rviz. Now at each instant of rotation i want to use tf to get the instantaneous pose of the lidar so that i can calculate the 3D point observed by the lidar. I create a point cloud each rotation of the lidar. Here is the code snippet i used for getting the tf. I do not have any problems getting the transforms. I do not get "Cannot lookup transform" or any other warning from the try block. |
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2017-11-20 18:04:21 -0500 | edited question | Load Parameters using roslaunch saved as .yaml from RQT Dynamic Reconfigure Reload Parameters using roslaunch saved as .yaml from RQT Dynamic Reconfigure Hello All, I have a motor controller boar |
2017-11-20 18:03:50 -0500 | edited question | Load Parameters using roslaunch saved as .yaml from RQT Dynamic Reconfigure Reload Parameters using roslaunch saved as .yaml from RQT Dynamic Reconfigure Hello All, I have a motor controller boar |
2017-11-20 18:02:25 -0500 | edited question | Load Parameters using roslaunch saved as .yaml from RQT Dynamic Reconfigure Reload Parameters using roslaunch saved as .yaml from RQT Dynamic Reconfigure Hello All, I have a motor controller boar |
2017-11-20 18:01:34 -0500 | edited question | Load Parameters using roslaunch saved as .yaml from RQT Dynamic Reconfigure Reload Parameters using roslaunch saved as .yaml from RQT Dynamic Reconfigure Hello All, I have a motor controller boar |
2017-11-20 18:00:38 -0500 | asked a question | Load Parameters using roslaunch saved as .yaml from RQT Dynamic Reconfigure Reload Parameters using roslaunch saved as .yaml from RQT Dynamic Reconfigure Hello All, I have a motor controller boar |
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2017-09-27 17:57:02 -0500 | commented answer | Minimum time between publishing a joint state and tf listener update Thank you @tfoote. THank you for linking me to MessageFilter. It was something i was looking for. I have already switche |
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2017-09-25 16:32:27 -0500 | commented question | Minimum time between publishing a joint state and tf listener update @gvdhoorn Thank you for that insight.i had not known the difference. However i tried with both and results are still the |
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2017-09-25 00:20:39 -0500 | edited question | Minimum time between publishing a joint state and tf listener update Minimum time between publishing a joint state and tf listener update Hi, I have 8 laser range finders propped up on a r |
2017-09-25 00:15:04 -0500 | edited question | Minimum time between publishing a joint state and tf listener update Minimum time between publishing a joint state and tf listener update Hi, I have a laser range finder propped up on a ro |
2017-09-25 00:13:28 -0500 | asked a question | Minimum time between publishing a joint state and tf listener update Minimum time between publishing a joint state and tf listener update Hi, I have a laser range finder propped up on a ro |
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2017-09-16 19:15:43 -0500 | answered a question | tf_echo is correct, yet no result from lookuptranform I had a local scope for the buffer which made it fail. In the tutorials its mentioned "The TransformListener object shou |
2017-09-16 18:23:41 -0500 | answered a question | Faster way to get stereo images at 640x480 from Raspberry pi Using UDP for streaming. https://github.com/surajshanbhag/Indoor_SLAM |
2017-09-16 18:09:39 -0500 | commented question | tf_echo is correct, yet no result from lookuptranform I am having the exact same issue. using tf2 didnt help. Did you solve it ? |
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2017-02-20 02:46:26 -0500 | asked a question | Faster way to get stereo images at 640x480 from Raspberry pi Hello All, I have connected 2 logitech C930e web cameras to a Raspberry Pi3 running a Ubuntu Mate and ROS Kinetic. I want to process the images on my laptop and only remotely see what the Pi sees using ROS. Using uvc_camera package and some tweaks, I am able to publish 320x240 grayscale stereo frames at about 5fps. Output of rostopic delay is as follows, From iftop i can see that for 2s the used bandwidth is 3.65Mb. Could anyone help me as to how i can increase the speed of the transfer. ? I want to be able to work at atleast 15fps. Also is it possible to run a live video stream using gstreamer or flask and then publish it to ros from the host system. ? Thank you ! |