Patent ID: 7239720

Claim:
An optical monitoring system, comprising: a moving body detection sub-system that images a monitored region onto an optical image plane and detects a moving body from changes over time in the monitored region; a speed detection sub-system that detects a speed of the moving body in the optical image plane; a scale detection sub-system that detects a size for the moving body in the optical image plane; and a moving body estimation sub-system that decides whether the moving body is a predetermined monitored subject based on the speed detected by the speed detection sub-system and the size detected by the scale detection sub-system, the moving body estimation sub-system having an actual scale estimation sub-system that determines an estimated actual size of the moving body based on the speed detected by the speed detection sub-system and the size detected by the scale detection sub-system, the moving body estimation sub-system deciding whether the moving body is the predetermined monitored subject based on the estimated actual size of the moving body.