No Skeleton Tracking features using Kinect and Image Acquisition Toolbox

Hi, I'm trying tu use Image Acquisition Toolbox and a Kinect V1 sensor to do Real Time skeleton tracking. But I have an Error, and I can't seem to find an answer on internet.So first of all this my code:

%Traqueur de Squelette
%Initialisation des variables
imaqreset;
Video = videoinput('kinect',1,'RGB_640x480'); %Video des Couleurs
Profondeurs = videoinput('kinect',2,'Depth_640x480'); %Video des Profondeurs

%Definition Trigger
triggerconfig(Profondeurs,'manual');
Profondeurs.FramesPerTrigger = 1;
Profondeurs.TriggerRepeat = 100;
set(getselectedsource(Profondeurs),'TrackingMode','Skeleton')

%Demarage Capteur de Profondeur
start(Profondeurs);
himg = figure;

%Calcul Squelette
while ishandle(himg)
    trigger(Profondeurs);
    [depthMap,~,depthMetaData] = getdata(Profondeurs);

      if sum(depthMetaData.IsSkeletonTracked > 0)
          skeletonJoints = depthMetaData.JointDepthindeices(:,:,depthMetaData.IsSkeletonTracked);
          imshow(depthMap,[0 4096]);
          hold on;
          plot(skeletonJoints(:,1),skeletonJoints(:,2),'*');
          hold off;
      else
          imshow(depthMap,[0 4096]);
      end
  end
  stop(Profondeurs)

And this is the Error I get:

Error using Kinect_SkeletonTest (line 12)
The name 'TrackingMode' is not an accessible property for an instance of class 'videosource'.

It seems like I cannot acces the skeleton tracking features even though I can acces the Color Video and the Depth Video just fine. I tried to type the following command to troubleshoot my problem: getselectedsource(depthVideo);

This is what i'm supposed to get (according to other people who tried doing the same thing as me):

getselectedsource(depthVideo);
ans =
       General Settings:
        Parent = [1x1 videoinput]
        Selected = on
        SourceName = DepthSource
        Tag = 
        Type = videosource

        Device Specific Properties:
          Accelerometer = [0.0 -1.0 0.0]
          BodyPosture = Standing
          CameraElevationAngle = 4
          DepthMode = Default
          FrameRate = 30
          IREmitter = on        
          SkeletonsToTrack = [1x0 double]
          TrackingMode = off

And this is what I personally get:

getselectedsource(depthVideo);
ans = 

     Display Summary for Video Source Object:

        General Settings:
          Parent = [1x1 videoinput]
          Selected = on
          SourceName = Depth Source
          Tag = [0x0 string]
          Type = videosource

        Device Specific Properties:
          Accelerometer = [-0.09768 -0.95238 -0.21856]
          CameraElevationAngle = 13
          FrameRate = 30.0918
          IREmitter = on

As you can see, many Device Specific Properties are not accessible on my device. And they are all related to skeleton tracking. It seems like my kinect doesn't even have any Skeleton Tracking features. Does anyone know this issue and how to fix it?

Sorry for the French Commentaries in the Code, and the bad English. Thank You for taking time to read my problem.

Answer 1

[Madhura Suresh]

Hi Elio,

1. What version of MATLAB are you using?

2. Is your sensor a Kinect for Windows Sensor or an XBOX sensor? Your sensor will have the word Kinect emblazoned on it if it is a KFW sensor.

3. What do you see in Kinect Explorer(its an application that is installed with the Kinect driver)? Do you see more properties than what you see in MATLAB?

[Elio De Gani]

Hi Madhura,

First of all thank you very much for your quick response.

For MATLAB I am using version R2015b.

My Kinect Sensor is a model 1414, but it has "XBOX 360" emblazoned on it.

For Kinect Explorer I can't seem to find it on my Computer. However, I installed Kinect for Windows Developer Toolkit v1.6.0 to check if there was a problem with the skeleton tracking of my Kinect. But the Demo skeleton tracking program they provide works just fine.

Other than that, my Kinect Drivers, SDK and Runtime are v1.6

[Madhura Suresh]

Hi Elio,

That makes sense then. The Image Acquisition toolbox only supports the Kinect for Windows sensor, and not the XBOX sensor.

Here is the link to the supported hardware page.

The 1.6 driver version is the right version that you have. If you get a Kinect for Windows sensor, you should be able to get skeleton tracking data as shown here.

Thanks, Madhura

[Elio De Gani]

Hi Madhura,

Thanks for the help.

I just have one last question. The material I use is given to me by my school and I don't know if they will be willing to purchase a new sensor. However they have a Kinect V2 sensor. Can Image Acquisition Toolbox work with that?

[Madhura Suresh]

Support for the Kinect V2 is planned for a future release of MATLAB.

[Walter Roberson]

Support for Kinect V2 was added to a later release; however, the later releases do not support Kinect for XBox at all.

Answer 2

[Unice Marasgian]

Hi! I tried using this code with a Kinect V2 sensor. But there was a time lag present on the frames (not realtime). So I would like to ask if there is also time lag present when you used a Kinect V1 sensor. Thanks!

[Alessandra Martinez]

Hello, did you get to fix the lag? I'm having the same issue

Answer 3

[Khan Rafin Ahmed]

Hello there,

I have also face this similar issue with the R2017 version of MatLab. Coudln't get a fix. But solved my problem was to run the code on previous version of Matlab like R2015a. MATLab functions are updated with every new version. Hence one code which runs on 2015 one doesn't run on 2017. They are independent. & Yes you can have both MatLab installed in the same computer and run them both.

Answer 4

[Andrei]

This error can occur in either of the following two situations: 1. Using a Kinect for XBox 360 device, which is unsupported. 2. Using a Kinect v2 device with code written for Kinect for Windows Sensor v1.

Refer to the following answer: https://www.mathworks.com/matlabcentral/answers/412741-why-am-i-getting-an-error-about-trackingmode-when-i-run-kinectforwindowsexample-m-with-a-kinect-v1