Kinect User Detection

Kinect user Detection

Also see Jurgeon D's answer on Kinect SDK player detection, as it deals with skeleton index. @Fixus is also right in that you could use a ID. But if you mean more than 2 people are detected, then only one is detected, that is not programming, that is in the Kinect's hardware and @FelixK. was right.

Skeletal Index

void nui_SkeletonFrameReady(object sender, SkeletonFrameReadyEventArgs e) 
{
    SkeletonFrame sf = e.SkeletonFrame;
    //check which skeletons in array are active and
    // use that array indexes for player index
    SkeletonData player1 = sf.Skeletons[playerIndex1];
    SkeletonData player2 = sf.Skeletons[playerIndex2];
}

Skeletal IDs

void nui_SkeletonFrameReady(object sender, SkeletonFrameReadyEventArgs e)
{
    SkeletonFrame sf = e.SkeletonFrame;

    if (sf.TrackingState == SkeletalTrackingState.Tracked)
     {
          int ID1 = sf.TrackingID;
     }

Also the code for detecting humans

 DepthImageFrame depthFrame;
 short[] rawDepthData = new short[depthFrame.PixelDataLength];
 depthFrame.CopyPixelDataTo(rawDepthData); 
 Byte[] pixels = new byte[depthFrame.Height * depthFrame.Width * 4];     
 int player = rawDepthData[depthIndex] & DepthImageFrame.PlayerIndexBitmask;

 if (player > 0)
 {
     //do something
 }      

How to restrict the detection of users to be 1?

look at the example here

http://www.codeproject.com/Articles/743862/Kinect-for-Windows-version-Body-tracking

where the array _bodies gets filled with people data, then simply take the first array element if available.

How to dynamically detect user is standing or sitting mode in Kinect SDK 2.0

Have you tried checking the positions of bones relative to one another?

If the hips are above the knees by some threshold maybe the user is standing.

You might also just be able to check how far the hips (or some other bone) is above the ground plane.

Kinect SDK player detection

Every player has an index in the Skeleton array:

void nui_SkeletonFrameReady(object sender, SkeletonFrameReadyEventArgs e) {
    SkeletonFrame sf = e.SkeletonFrame;
    //check which skeletons in array are active and use that array indexes for player index
    SkeletonData player1 = sf.Skeletons[playerIndex1];
    SkeletonData player2 = sf.Skeletons[playerIndex2];

You can use that index to identify your players if one leave and comes back.

But if both players leave the sight of the Kinect it is not granted that the player index is correct when they enter the Kinect visibility again.

c# Kinect 2.0 How to detect how far a body away from the center of Kinect sensor

For me I use the CameraSpacePoint class.

For this I use 1 Joint for example the center of the body, and i convert it in CameraSpacePoint.

For example:

CameraSpacePoint myPoint = myJoint.Position;
Console.WriteLine(pointLeft.X);//for have your distance 

The distance was in meter with 0 the center of Kinect Sensor

It works also with Y and Z.

You can found more information here: CameraSpacePoint Structure.

Unable to use the 'Gesture Detection using Kinect' from the Kinect SDK samples

Ok I still don't know where I was going wrong. What I did was work around this by creating methods to update flags in MainWindow from within `GestureDetect' funtion and using those flags to call my 'Capture' method.

So that's a possible workaround. If somebody can tell me where I was going wroung though I would really appreciate it as I couldn't figure it out.

Thanks.

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