Person Tracking mode (of which skeleton tracking is a sub-feature) is supported on SR300 but is rarely used on that camera. It is much more common for the R200 model to be used for Person Tracking.
The only SR300 Person Tracking video that I know of is this one from Mike Taulty (who has also produced tutorials on his blog ( https://mtaulty.com/ ) that have been very useful for other aspects of RealSense programming).
It is possible to create full-body tracking on an SR300 in Unity without using Person Tracking. My own Unity project does this.
Thank a lot for your reply. The idea of my app is like this Augmented Reality Virtual Fitting Room, TryLive Apparel - YouTube
Is there any unity sample provided by them which demonstrate person tracking mode?
What do you suggest should i go with realsense sr300 for developing virtual dressing room or lookout for other options such as kinect?
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Whilst Kinect may be a valid option if you are developing the dressing room app as a personal project and not a commercial one (since you can no longer buy Kinect cameras), the SR300 is much newer camera technology, so my recommendation would be to go with the SR300 in order to produce the most capable app possible.
The RealSense SDK only comes with a sample Person Tracking program for the R200 camera model and not the SR300, unfortunately. The R200 is the more suitable camera of the two, as it is better at scanning full human bodies than the SR300 is.
The '2016 R2' RealSense SDK does have a sample Unity program called AR Mirror though, which overlays virtual objects onto a real body in a similar way to the clothes in your example YouTube video.