Why is my Kinect metadata struct different?

Question

Seonghoon Noh 2017-7-31

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/350987-why-is-my-kinect-metadata-struct-different

回答： Sahir Moreno 2017-11-7

I have the Kinect for Xbox One with the adapter for Windows, and I am running r2017a.

When I use getdata from the depth videoinput object, I get a 10 x 1 struct that looks different from the one here. https://www.mathworks.com/help/imaq/acquiring-image-and-skeletal-data-using-the-kinect.html?requestedDomain=www.mathworks.com

depthVid = videoinput('kinect',2,'Depth_512x424');
start(depthVid);
[~, ~, metadata] = getdata(depthVid);
    metadata = 
    10×1 struct array with fields:
      AbsTime
      BodyIndexFrame
      BodyTrackingID
      ColorJointIndices
      DepthJointIndices
      FrameNumber
      HandLeftConfidence
      HandLeftState
      HandRightConfidence
      HandRightState
      IsBodyTracked
      JointPositions
      JointTrackingState
      RelativeFrame
      TriggerIndex

I especially need the IsSkeletonTracked field, but I am not sure why it is not listed.

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Answer 1

Sahir Moreno 2017-11-7

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https://ww2.mathworks.cn/matlabcentral/answers/350987-why-is-my-kinect-metadata-struct-different#answer_289911

Hi! is because you checked the metadata from the kinect V1 and you are using the kinect v2 in this case the "IsBodyTracked" property is the same as "IsSkeletonTracked", also the parameters changed and you only have to write "on" to activate the property. This link indicates the properties of kinect v2 for skeleton data:

https://www.mathworks.com/help/supportpkg/kinectforwindowsruntime/ug/acquire-image-and-body-data-using-kinect-v2.html