Kinect depth variance analysis

Here are the visualizations of absolute depth differences for each pixel for 40 frames using a Kinect. The setup is like this.

White color shows all pixels with absolute difference greater than 4mm

The high variance at the bottom right corner is due to the mouse which has a shiny surface and the Kinect does not work very well with shiny surfaces.  

White color shows all pixels with absolute difference greater than 2mm

White color shows all pixels with absolute difference greater than 1mm

Absolute depth variance shown as a heat map. The color changes from black, red, yellow and white as the value increases. The difference values are clipped between 0.8 and 2.