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2017-02-07 04:41:33 -0500 asked a question rtabmap visual odometry

hi everyone, i'm facing some error or strange behaviour when rotating my camera along the yaw axis. i'm running the handheld tutorial ( http://wiki.ros.org/rtabmap_ros/Tutor... ) with a orbbec astra (running with the astra_camera ros package). i put the camera on a tripod just to be sure to not translate my camera while rotating it, however the odometry shows an unexpected translation on the y axis (as you can see in the attached pictures). Any sort of help will be very appreciated.

ps. i'm not sure the browser to have attached my file.. in case you can find it here https://drive.google.com/open?id=0B5G...

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2017-01-18 10:11:33 -0500 asked a question rtabmap_localization issue

hi, i'm using rtabmap and i'm pretty new to it. I'm noticing an unexpected behaviour where the algorithm is running continuously even when the robot is not moving, and it update the map->odom tf with differences under 10cm but often over 5-6 cm.. i've attached a video that illustrate this behaviour and also you can view the video here https://drive.google.com/open?id=0B5G... .

2017-01-18 09:04:38 -0500 asked a question rtabmap_ros distortion model

Hi everyone, i'm using rtabmap with his ros wrapper for slam operations. i've made a distortion model (a ".bin" file) following this guide https://github.com/introlab/rtabmap/w... but i don't know how to use the distortion model with the ros wrapper of rtabmap. the calibration tutorial show where to link the distortion model file in the standalone application only. thanks in advance

Andrea Ruzzenenti

2017-01-18 09:03:08 -0500 asked a question distortion model depth camera

Hi everyone, i'm using rtabmap with his ros wrapper for slam operations. i've made a distortion model (a ".bin" file) following this guide https://github.com/introlab/rtabmap/w... but i don't know how to use the distortion model with the ros wrapper of rtabmap. the calibration tutorial show where to link the distortion model file in the standalone application only. thanks in advance

Andrea Ruzzenenti

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2016-10-05 11:12:28 -0500 asked a question kinetic kame on tegra TX1 jetpack 23

Hi everyone, i wish to take advance of the cuda capabilities of the tegra TX1 jetpack 23 (so.. ubuntu 16.04) for slam purpose (in particular the surf/sift algorithm). is there a way to run ros and the various slam package (in my case rtab map) on the tegra?

thanks in advance

2016-10-04 10:39:11 -0500 asked a question Cannot install kinetic (unmet dependencies)

Hi, I have an installation problem. By running "sudo apt-get install ros-kinetic-desktop" on a Ubuntu 16.04.1 LTS (Xenial) i have the following output

Reading package lists... Done

Building dependency tree

Reading state information... Done

Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming.

The following information may help to resolve the situation:

The following packages have unmet dependencies:

ros-kinetic-desktop : 

Depends: ros-kinetic-common-tutorials but it is not going to be installed

   Depends: ros-kinetic-geometry-tutorials but it is not going to be installed
   Depends: ros-kinetic-robot but it is not going to be installed
   Depends: ros-kinetic-ros-tutorials but it is not going to be installed
   Depends: ros-kinetic-urdf-tutorial but it is not going to be installed
   Depends: ros-kinetic-visualization-tutorials but it is not going to be installed
   Depends: ros-kinetic-viz but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

what can i do? thanks in advance

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2016-09-20 03:00:58 -0500 commented question rviz path localization update

i'm already using the highest tf as fixed frame (map). For the transform frequency i checked with rqt and the value is around 200 Hz. is it enough?

2016-09-19 16:27:19 -0500 asked a question rviz path localization update

I to you all, i'm pretty new to to Ros and rviz and i'm not a native english speaker so i'll try my best to explain my question.

I have my own navigation module and i think that can be usefull to publish some path information to be displayed in a path channel in rviz. therefore I have my function that publish a path message with an array of point (pose messages) in it. both the path message and the poses have the robot frame in the header's frame_id parameter cause i want the poses to be expressed in the robot's coordinate system.

now everythings works fine exept one thing. the single poses are updated frequently but the Whole path is not. i'll explain better: the shape of the path change along with the messages but the position of the Whole path alins with the robots every 3/4 second (instead of following him costantly). it's seems like rviz compute the transformation from the tf very slowly.

what can i do about it? tha only solution i've thought to is to draw the path in the map coordinate system to avoid the problem. there are other solution? am i doing something wrong?

thanks in advance

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2016-08-02 08:22:06 -0500 marked best answer base_local_planner simplest navigation (no curve lines)

hi there, i'm pretty new to ros world and i want my robot to navigate only straight+inplace rotation. I noticed that with base_local_planner the robot start to go navigate forward before finishing the orientation. How can i accomplish this goal? thanks in advance

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2016-08-01 03:56:55 -0500 commented answer base_local_planner simplest navigation (no curve lines)

i'm a bit disappointed for base_local_planner (and the other local planner too) not to having a simple flag to work in this way though

2016-08-01 03:56:06 -0500 commented answer base_local_planner simplest navigation (no curve lines)

first of all, thank you for the answer. what you describe seems to work only with multiple goal so i presume i have to (by writing a simple action client) split a single goal in two sub-goal the first for the rotation and the second for the linear movement.

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2016-07-28 03:23:55 -0500 commented question base_local_planner simplest navigation (no curve lines)

@Humpelstilzchen what i'm searching is a local planner that navigate the robot in a full-in-place-rotation-first-then-go-ahead way. with the robot path that always looks like a polygon

2016-07-28 03:19:58 -0500 commented question base_local_planner simplest navigation (no curve lines)

you mean that is not possible with base_local_planner or dwa to navigate the robot only on straight lines? anyway i'll try it

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