Adjusting motion capture based on the distance between tracked objects

A non-transitory computer readable memory storing instructions for adjusting a camera parameter using a distance of two or more objects in a 3D monitored space, which instructions, when executed by a processor perform a method comprising:

• receiving a selection of first and second objects in a 3D monitored space identified in images captured by one or more cameras using a gesture;
• using spatial coordinates obtained for the first and second objects, obtaining a calculated distance between the first and second objects calculated for the selection;
• and
• providing, based at least in part upon the calculated distance, an adjusted at least one camera parameter;
• whereby the adjusted at least one camera parameter enables repeatedly obtaining spatial coordinates for the first and second objects from additional captured images of the first and second objects.