Smart surveillance system for swimming pools

A swimming pool monitoring system comprising:

• an imaging sensor with a known distance to a base surface;
• a computer system with a non-transitory computer readable medium storing a program causing the computer system to execute processes to receive image frames from the imaging sensor, to detect an object within when comparing image frames at a horizon of each image frame to a floor of each image frame, to determine a range of the object from the imaging sensor, and to determine a width and height of the object with right triangle trigonometric equations;
• and
• an alarm system in communication with the computer system to sound at least one of an audible, visual and tactile alarm emitting from at least one of the computer system and a remote device when determined that the object is entering into a predetermined perimeter area around the swimming pool relative to the imaging sensor.