Leap Motion,How to get the real hand?

Now I have got the images from Event Raw Image Received,but I want to get the hand only,What am I to do?
76163-b.png
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Thats the Raw IR image, you can’t strip out components of that. You want to get the tracking points of the hand and match that to a 3D mesh if you want to show a 3D representation of a hand.

OH,Thank you very much!