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Questions tagged [ar-kinect]

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Problem with assigning different colors to segments in PointCloud

Hello, I am trying a segment tracking algorithm. Right now I have 2 segments. I am coloring each segment with different RGB values, pushing the segments into output_cloud which is pcl::PointCloud2pcl::...
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How to invert coordinate frames of a Transform

I have a fixed transform coming from the ar_track_alvar pkg, that gives me the markers pose into the camera_link. I want to get the inverse of it and save the exact data but reversed. The problem is ...
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what is the major difference between ROS distributions

Hello, I want to ask about what is the differences between different ROS distributions? Originally posted by ShehabAldeen on ROS Answers with karma: 97 on 2017-11-28 Post score: 1
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local costmap empty in ros navigation

Hi everyone, I have a Kinect on a mobile robot, where I use the package pointcloud_to_laserscan to publish a fake laser in the topic /scan for the navigation stack. The problem is that I am not able ...
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pointcloud_to_laserscan, how to change the slice height

Hi everyone, I am running the pointcloud_to_laserscan package successfully with a Kinect. Now I want to change the height/angle at which the laser takes the slice from the pointcloud. Probably I am ...
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How to read QR with kinect and get position of that QR?

I am trying to locate qr code and want its position as well . I am using kinect v1 can any one help me in this scnerio . Originally posted by Qayyum on ROS Answers with karma: 11 on 2016-09-17 Post ...
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Problem building ar_kinect

Hello everyone, Can anyone help me? I'm working with ROS Indigo on Ubuntu 14.04. I need to read some tags through artoolkit using a kinect camera. I had cloned ar_kinect into my catkin_workspace and ...
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ar_kinect with pointcloud_throttle

Hello, I run the ar_kinect node to detect some ARmarkers. This works fine as long as I do not use pointcoude_throttle nodelet to reduce the amout of calculations. I started the pointcloud throttle as ...
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Marker long distance tracking with Kinect

I would like to use the Kinect to detect my Turtlebot and have a better odometry. So the Kinect is located between two and five meters from the turtlebot.I tried so many package like ar_pose, ...
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Transform between /openni_depth_frame and /camera_link

Hi I'm a bit confused since I'm new to ROS. I'm using the openni_tracker and ar_kinect packages together. Rviz complains that it can't transform from any of the skeleton topics (e.g. /head1) to /...
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ar_markers - import coordinates python file

Hi. I use the ar_kinect package to recognize the ar_markers. I like to import the coordinates in the python file so I have to initialise the Markers which I use at the begin of the file and found this ...
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ar_kinect node not found

Is there a possibility how I can check that a node exists in a package? Because in the ar_kinect package should be the ar_kinect node, but when I start the launch file, I get the error message that ...
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ar_kinect crashes after throwing 'std::out_of_range'

Hi, ar_kinect keeps throwing an instance of 'std::out_of_range' after running for a few seconds on my computer (see code below for a typical run). I'm using it to detect and track the pose of 6 ...
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Filtering transform over time

I am using ar_kinect and I'm getting some noise in the orientation. Since my camera motion is relatively slow I wanted to filter the transforms over time. I have designed an FIR filter. I was ...
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roboearth: record object, could not get camera pose

Hi, I'm trying to run the roboearth object recording package on electric turtlebot. I started the turtlebot by running minimal bring up, run the kinect by ar_kinect_turtlebot.launch. Now I run the ...
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ar_kinect nan value in the transform

I set up ar_kinect and printed the 4x4 pattern on a piece of paper (letter size). Everything seems to be working except that the recognition of pattern is on and off. In particular it only recognizes ...
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Doing a tf lookupTransform without publishing a specific transform?

Perhaps this is not the best title for my question, so let me briefly explain a situation. I have a system where there is an ARTag which I am detecting from the camera using ar_kinect. I know this ...
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how do i change topic name for ar_pose?

By default, ar_pose package looks for Image data published by usb_cam, but I would like it to look for Image data published by a different node (ar_drone). Is there a way to change the topic source ...
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ar_kinect not finding published point cloud data

Hello, I'm trying to use ar_kinect (http://www.ros.org/wiki/ar_kinect) to report pose information of a fiducial, visual marker. I'm taking the following steps to run ar_kinect: Open terminal and run: ...
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