asrinivasan31's profile - activity

Hi:

I having trouble getting rosmake to compile with the new version of opencv. I keep getting "fatal error: opencv-2.3.1/opencv2/features2d/features2d.h: No such file or directory compilation terminated."

I don't remember personally installing opencv, it must have come up with something else, perhaps (ROS-Electric). But anyway, I have the *.so.2.3.1 libraries in the /usr/lib folder and the include directory in /usr/include/opencv-2.3.1/opencv2/.... I set the C_PATH_INCLUDE and CPLUS_PATH_INCLUDE variables to the 2.3.1 directory and yet it still can't find the .h files.

What else is required so my package can see it? I think Cmakelists.txt only has the Find_Package(OpenCv) which only finds the old opencv and not the 2.3.1 version. I need it to be this version so I can use the simple blob detection api. Any help is appreciated.

Thanks in advance.

Update: I was able to do the rest of the tutorial and duplicate what the demo was trying to achieve, so I guess it doesn't matter any more.

Hi All:

I can't get the turtle_tf demo to work based on the following link: tf/Tutorials

This is the error I get when I do roslaunch turtle_tf turtle_tf_demo.launch:

Use arrow keys to move the turtle.
process[turtle2_tf_broadcaster-5]: started with pid [9096]
process[turtle_pointer-6]: started with pid [9101]
Traceback (most recent call last):
File "/opt/ros/electric/stacks/geometry_tutorials/turtle_tf/node/turtle_tf_listener.py", line 57, in <module>
(trans,rot) = listener.lookupTransform('/turtle2', '/turtle1', rospy.Time())
tf.ExtrapolationException: Lookup would require extrapolation at time 1321729575.578088045, but only time 1321729575.578494072 is in the buffer, when looking up transform from frame [/turtle1] to frame [/turtle2]
[turtle_pointer-6] process has died [pid 9101, exit code 1].
log files: /home/adith/.ros/log/8cffc6c6-12e1-11e1-81b9-0026829e5a54/turtle_pointer-6*.log

Another post mentions this same problem but they were using diamondback. How do I resolve this on electric?

Thanks in advance.

Hi:

Has anyone used the above package with ROS? I ran roslaunch skeleton_markers markers_from_tf.launch which tracks using the openni_tracker and set my rviz config to markers_from_tf.vcg. If I use a fixed frame relative to one of the body points, say head or torso, I see the markers but not always all of them. It's like rviz shifted the image seen on the screen down or maybe its a zoom..

Anyway if I set fixed frame to the camera, ie. skeleton_openni_depth_frame, then I don't see the markers any-more. If I come real close to the camera I see the markers but they are all jumbled up and don't make any sense. Could there be a problem with the transform from the camera to the 2d representation?

Thanks in advance.

Update:

Now I can see the image from the camera display by adding the topic /camera/rgb/image_color topic to rviz using openni_launch openni.launch which I couldn't do before. However, the topics regarding point cloud 2 display don't ever get published.

Second Update: The point cloud2 display has started working. I don't know how (maybe it was the ros updates that I did yesterday), but I consistently can get them to display except now, rviz freezes and I get the following error repeatedly

Image messages received:      0
CameraInfo messages received: 84
Synchronized pairs:           0
Image messages received:      0
CameraInfo messages received: 92
Synchronized pairs:           0

I have tinyxml showing that it has been installed in ubuntu software center, yet I still get the above error. Any ideas why? This happened after I updated ROS-electric 10 min ago. The above comments imply that this should have already been fixed by now... Note: I tried to doing the sudo apt-get upgrade as well after the update and still nothing.

So I ran openni_camera openni_node.launch and changed some settings in rviz to publish the raw image topic and I saw some point clouds, although it didn't look very good. I wanted to try tinkering around the settings some more, but I did a ros update and now I can't open anything! Anyone else get this error:

/opt/ros/electric/stacks/nodelet_core/nodelet/bin/nodelet: error while loading shared libraries: libtinyxml.so.2.5.3: cannot open shared object file: No such file or directory

this is very frustrating.....

Hi:

I am encountering the same problems as Henning's post with the error in configuration file as well as "tried to advertise service that is already advertised in this node". As a result, my rviz shows that for the pointcloud2 display the topics are not publishing any messages. Has anyone successfully resolved this issue? Restarting the driver X # of times cannot possibly be the only way... I am running Ubuntu 11.04 with rose electric and my USB ports are 2.0.

Thanks in advance