1. A method for parking occupancy determination, said method comprising: acquiring video of an entrance to a parking lot utilizing at least one video camera focusing on a pre-defined vision-based region of interest and a pre-defined video-based region of interest; video processing said video via at least one classifier pre-trained to take into account potential camera shake disturbances to generate video output data thereof; and analyzing said video output data for parking lot occupancy data, wherein an impact of camera shake with respect to said at least one video camera is minimized to determine parking lot occupancy.