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2012-02-02 06:08:41 -0500 marked best answer Skeletal tracker?

The rotation is represented as a quaternion which has values in a non-readable format. You can use tf to convert between quaternions and euler angles ( e.g. tf::Quaternion createQuaternionFromRPY(double roll,double pitch,double yaw) ).

What do you mean by height and left-right? What joint are you referring to?

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2012-02-02 06:08:28 -0500 commented answer Skeletal tracker?
This helped... Thanks a lot !!
2012-02-02 05:42:33 -0500 commented answer Skeletal tracker?
If camera is the origin, then what are the three axes directed along (for any joint) ?
2012-01-31 23:18:47 -0500 asked a question Skeletal tracker?

I was trying to use the skeletal tracker under openni_kinect and i noticed that it publishes translation and rotation values. But the rotation is represented by w,x,y,z; what do these represent? Also in case of translation, which variable represents depth, which one for height and which one for left-right?

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2011-10-15 16:17:40 -0500 commented answer ImportError: No module named yaml
I havent separately installed yaml, it came along with python installation. Also I see yaml folders in /usr/lib/python2.6/dist-packages as well as /usr/lib/python2.7/dist-packages. So i am guessing that yaml is installed for 2.7 also. now what does that mean?
2011-10-15 16:17:06 -0500 answered a question ImportError: No module named yaml

I havent separately installed yaml, it came along with python installation. Also I see yaml folders in /usr/lib/python2.6/dist-packages as well as /usr/lib/python2.7/dist-packages. So i am guessing that yaml is installed for 2.7 also. now what does that mean?

2011-10-14 19:14:51 -0500 asked a question ImportError: No module named yaml

After i recently installed a new version of python, nothing is working in ros. Every time i get import error saying no yaml found. For example, when i run roscore, i get an error as follows:

Traceback (most recent call last):

File "/opt/ros/diamondback/ros/bin/roscore", line 34, in <module>

from ros import roslaunch

File "/opt/ros/diamondback/ros/core/roslib/src/ros/__init__.py", line 41, in <module>

import roslib

File "/opt/ros/diamondback/ros/core/roslib/src/roslib/__init__.py", line 50, in <module>

from roslib.launcher import load_manifest

File "/opt/ros/diamondback/ros/core/roslib/src/roslib/launcher.py", line 45, in <module>

import roslib.manifest

File "/opt/ros/diamondback/ros/core/roslib/src/roslib/manifest.py", line 46, in <module>

import roslib.packages

File "/opt/ros/diamondback/ros/core/roslib/src/roslib/packages.py", line 58, in <module>

import roslib.os_detect

File "/opt/ros/diamondback/ros/core/roslib/src/roslib/os_detect.py", line 49, in <module>

import yaml

ImportError: No module named yaml

.............................................................................................

And yes, i have installed yaml.

"sudo apt-get install python-yaml" gives

Reading package lists... Done

Building dependency tree

Reading state information... Done

python-yaml is already the newest version.

0 upgraded, 0 newly installed, 0 to remove and 107 not upgraded.

.............................................................................................

What could be the problem?

2011-07-19 17:32:04 -0500 marked best answer Creating supernode

rosh offers introspection capabilities into the ROS API and may offer a good set of tools to start with.

2011-06-22 16:45:19 -0500 asked a question Creating supernode

I want to create a node which handles other nodes. Like it looks into the clients and their requests, and looks for the servers which provide the required service, starts those servers and provide the corresponding service to the client. How do i go about it? Thanks in advance...