VIDEO/VISION BASED ACCESS CONTROL METHOD AND SYSTEM FOR PARKING OCCUPANCY DETERMINATION, WHICH IS ROBUST AGAINST ABRUPT CAMERA FIELD OF VIEW CHANGES

Methods, systems and processor-readable media for parking occupancy determination. Changes in the field of view can be measured using template matching between templates derived from an original scene and a current scene with motion removed. The changes measured in the field of view can be employed to adjust data indicative of a region of interest for vision-based processing thereof if the changes measured are above a pre-determined threshold so that the impact of the changes with respect to the field of view to performance is minimized.