使用kinect为wpf C＃捕获头部图像

I'm trying to capture an image using Microsoft Kinect around the head without the using of face detection. I manage to capture the whole camera image but not just around the head only. I have found some sample code on the internet but it doesn't seem to work on my program. Using Microsoft SDK v1.6 and Microsoft Visual Studio for my program. Can anyone help me on this? Thanks a lot XDI'm trying to capture an image using Microsoft