Hi, I'm trying to design a solution to the problem of finding golf balls in the rough. I've had a few thoughts so far: - Image processing to detect white objects in a predominantly green environment - UV light emitter and detector to take advantage of fluoresence of the whitening coating of the ball - Ultrasonic system to detect solid objects in grass, followed by profiling to determine shape I expect the system should be portable so golfers can scan the grass as they walk and receive some feedback when a ball is found. My main focus is on the latter idea and I was wondering if anyone with any experience of ultrasound knew if this was possible. Would, perhaps, the solid ball reflect ultrasound waves more strongly than a clump of grass? Once I've established if this works I can (attempt to) devise a system to ID a ball from any other solid object. Thanks.