I am dealing with same this problem.
Kinect is on the ground and want to correct the perspective like seeing in the front of person.
Here is dtr's thankful patch contribution.
but the shadows won't make the depth visual look normal as a front view.
So If I use 2 Kinect (on the ground-look up, and over the head-look down),
Can I make the corrected perspective like seeing in front of the person?
Any suggestion please!