Why is my Kinect metadata Incorrect ?

I have a Kinect for XBoxOne device.

My Mattalb Version is R2016a .

I have installed " Image Acquisition Toolbox Support Package for Kinect For Windows Sensor " from here . then , I detected the Kinect V2 Devices like this correctly .

After that , I followed this to Acquire Image and Body Data .

But , Why is my Kinect metadata different ???????

my Kinect metadata :

metaData = 

10x1 struct array with fields:

    AbsTime
    BodyIndexFrame
    BodyTrackingID
    ColorJointIndices
    DepthJointIndices
    FrameNumber
    HandLeftConfidence
    HandLeftState
    HandRightConfidence
    HandRightState
    IsBodyTracked
    JointPositions
    JointTrackingState
    RelativeFrame
    TriggerIndex

This is not correct !

and , " metaData.IsBodyTracked " gives me ten anses !! why ten ?

    >> metaData.IsBodyTracked

ans =

     0     0     0     0     0     0


ans =

     0     0     0     0     0     0


ans =

     0     0     0     0     0     0


ans =

     0     0     0     0     0     0


ans =

     0     0     0     0     0     0


ans =

     0     0     0     0     0     0


ans =

     0     0     0     0     0     0


ans =

     0     0     0     0     0     0


ans =

     0     0     0     0     0     0


ans =

     0     0     0     0     0     0

These are not in accordance with this link .

and :

>> metaData.JointPositions(:,:,1)

gives me this error in red :

Expected one output from a curly brace or dot indexing expression, but there were 10 results.

What's the problem ?? What should I do ??

Answer 1

[GUO WU]

Hello , have you solved this problem? Now I also have problem with "isBodayTracked".

Answer 2

[Walter Roberson]

10x1 struct array with fields:

You have a 10 x 1 struct array because you had information returned for 10 different frames.

Each frame has its own metadata, indexed by the frame number. So where you have

 metaData.IsBodyTracked

you should be using

  metaData(frame_index).IsBodyTracked

for appropriate frame_index value .

If you want to get all of the isBodyTracked information for all of the frames at the same time, then use

   vertcat(metaData.IsBodyTracked)

Answer 3

[Ahmet Yilmaz]

Hello , have you solved this problem? Now I also have problem with "isBodayTracked". If you have a solution would you please share with us? Thank you.

[Walter Roberson]

Are you doing the indexing I talked about in my Answer, but still getting told that metaData(frame_index).IsBodyTracked has multiple outputs?