1. A hybrid method of video and vision based access control for parking occupancy determination, said method comprising: acquiring at least one image frame of a parking area of interest from among at least two regions of interest defined with respect to said parking area of interest; analyzing said at least two regions of interest defined within said parking area of interest for motion detection or content change detection; performing a vision-based image content classification operation with respect to a first region of interest among said at least two regions of interest based on a result of said content change detection; and performing an object tracking operation with respect to a second region of interest among said at least two regions of interest if a result of said vision-based image content classification operation indicates a presence of an object of interest within said parking area of interest to thereafter determine a type of access authorized with respect to said parking area of interest and based on a result of said object tracking operation.