How to get coordinates of joints in Kinect? - coordinates

Question

I am learning about Kinect and I have a problem. I want to write to a text file the coordinate of joints of the skeleton but i don't know how to do that. Can anybody help me ?

Answer 1

If you are using the SDK:
using System.IO;
StreamWriter writer = new StreamWriter(#path);
int frames = 0;
...
void AllFramesReady(object sender, AllFramesReadyEventArgs e)
{
frames++;
using (SkeletonFrame sFrame = e.OpenSkeletonFrameData())
{
if (sFrame == null)
return;
skeletonFrame.CopySkeletonDataTo(skeletons);
Skeleton skeleton = (from s in skeletons
where s.TrackingState == SkeletonTrackingState.Tracked
select s);
if (skeleton == null)
return;
if (skeleton.TrackingState == SkeletonTrackingState.Tracked)
{
writer.Write("{0} {1}#", frames, timestamp);//I dont know how you want to do this
foreach (Joint joint in skeleton.Joints)
{
writer.Write(joint.Position.X + "," + joint.Position.Y + "," joint.Position.Z + ",");
}
writer.Write(Environment.NewLine);
}
}
}
This takes the joints of a detected skeleton, and writes them to a file without specifying their relative joint, but it is in the default order of the joint types. Note this is the distance from the kinect sensor.

Answer 2

Thank you, but it has one problem with 'skeletons'in this line:
Skeleton skeleton = (from s in skeletons where s.TrackingState == SkeletonTrackingState.Tracked select s);
System.IO.FileStream fs = new System.IO.FileStream(#"F:\Kinect Install\SkeletonBasics-WPF\Coordinates.txt", FileMode.Append, FileAccess.Write, FileShare.None);
int frame = 0;
Skeleton[] skeletons = new Skeleton[0];
public void AllFramesReady(object sender, AllFramesReadyEventArgs e)
{
StreamWriter sw = new StreamWriter(fs);
frame++;
using (SkeletonFrame sFrame = e.OpenSkeletonFrame())
{
if (sFrame == null) return;
sFrame.CopySkeletonDataTo(skeletons);
Skeleton skeleton = (from s in skeletons where s.TrackingState == SkeletonTrackingState.Tracked select s);
if (skeleton == null)
return;
if (skeleton.TrackingState == SkeletonTrackingState.Tracked)
{
foreach (Joint joint in skeleton.Joints)
{
sw.WriteLine(joint.Position.X + "," + joint.Position.Y + "," + joint.Position.Z + ",");
}
//writer.Write(Environment.NewLine);
sw.Flush();
sw.Close();
}
}
}