must have way user can turn off system and turn back on
must have way for system to respond when user is detected as fallen ---show highlighted person in image on floor, pop up alert message saying going to call some emergency number if user does not respond in X minutes.
must have way user can respond (best but, of course not required to use speech recognition that is part of Kinect) withing the X minute timeframe they are okay.
Testing and Measurement -
you must setup a series of tests (could save to video or live) to test cases when user normally walking, sitting, laying on couch.
you must setup a series of tests when user is falling and then on floor (have different cases when person still, body moving but still on ground ---you come up with ideas --legs only moving, rolling, fast movement as lay on floor, falling - slow to fast---grabbing things as go down.
Problems
What are the problems you are encountering ---what if user falls behind the couch or partially occluded by a chair
Does system respond differently when user is moving on ground compared to still,etc.