through the use of image processing and set - up calibration techniques , an accurate position of an object may be determined . embodiments of the present disclosure measure a change in position over a known time interval . accordingly , the change in position aids in measuring the object &# 39 ; s metrics such as , for example , position , velocity , acceleration , maximum velocity , maximum acceleration and / or maximum deceleration . the object can be , for example , any person , individual body part , a group of body parts , a vehicle , or any other movable object .