MSYazeed's profile - activity

Hi guys,

I'm using ar_kinect for marker detection on ros hydro, as far it works perfectly and can visualize it on Rviz. But How would I get the coordinates (x,y,z) of the marker and the distant between the marker and the camera

Thanks for your help

Hi Guys,

I'm new to ros and this packages system. I'm trying to edit the cpp files for ar_track_alvar package, yet I can't find where are they, I can only see the header files but not the cpp files

Thanks for your help

Thank you so much for your help

/usr/include/eigen3/Eigen/src/Core/DenseStorage.h:69: Eigen::internal::plain_array<t, size,="" matrixorarrayoptions,="" 16="">::plain_array() [with T = float, int Size = 4, int MatrixOrArrayOptions = 0]: Assertion `(reinterpret_cast<size_t>(array) & 0xf) == 0 && "this assertion is explained here: " "http://e

Thank you so much its working now and can detect the the marker, but some how it shows the marker on Rivz for a second then it gives me the following error

Hello guys,

I'm still new to ros. and at the moment I'm using ar_track_alvar to detect markers. so far I was able to detect them and show them on Rviz but it only flashes the location of the markers then it gives me this error :

/usr/include/eigen3/Eigen/src/Core/DenseStorage.h:69: Eigen::internal::plain_array<T, Size, MatrixOrArrayOptions, 16>::plain_array() [with T = float, int Size = 4, int MatrixOrArrayOptions = 0]: Assertion `(reinterpret_cast<size_t>(array) & 0xf) == 0 && "this assertion is explained here: " "http://eigen.tuxfamily.org/dox-devel/TopicUnalignedArrayAssert.html" " **** READ THIS WEB PAGE !!! ****"' failed. Aborted (core dumped)

Any idea what would be causing this ?

I'm simply running:

roscore

roslaunch openni_launch openni.launch

rosrun ar_track_alvar individualMarkers 4.4 0.08 0.2 /camera/depth_registered/points /camera/rgb/camera_info /camera_rgb_optical_frame   

rosrun rviz rviz

Thank you for your help!

This is the full error: [ERROR] [1424775599.179064296]: Client [/marker_detect] wants topic /camera/rgb/image_color to have datatype/md5sum [sensor_msgs/PointCloud2/1158d486dd51d683ce2f1be655c3c181], but our version has [sensor_msgs/Image/060021388200f6f0f447d0fcd9c64743]. Dropping connection.

I also should note that I ran roscore first then openni_launch then the ar_track_alvar and rviz. it gives me weird error saying '[1424775599.179064296]: Client [/marker_detect] wants topic /camera/rgb/image_color to have datatype/md5sum [~], but our version has [~]. Dropping connection.

currently I'm using /camera/rgb/image_color for Camera image topic to make the camera receive the coloured image . and for the output frame I'm using camera_link(not sure its right). but I can't see any output yet and I can't manage to show it on rviz. What am I doing wrong here ?

Hello guys,

I'm new to ros and want to use it for markers detection. I don't know how to use ar_track_alvar (individualMarkers) in the proper way to make it work using Kinect camera. I'm also confused about the parameters (Camera image topic, Camera topic info, output frame) what should be used there ?

And finally should I run rviz to before using ar_track_alvar package ?

Thank you for your help!