Speed and direction indicator for video systems

摘要: Apparatus is disclosed for measuring the speed and direction of subject movement between two video frames using only signal. Two selected differential signals are derived from One compared to a threshold determine presence signs each other find movement. Sums signal, in an area designated as moving, accumulated over frame accordance with sign comparison signals. At end frame, sums evaluated ascertain verify lateral An embodiment invention uses this technique measure In another particularly advantageous embodiment, same basic extended both horizontal vertical Individual indicative then combined provide resultant vectorial signal complete that occurred.