well, that depends a lot on the lighting, the color contrast between what you are looking for and the background, how well you calibrate your camera, your color tolerances, etc.
My camera can (read has) acquire an 18" traffic cone in a park seting at about 18', pretty much every time.
The Crazed Inventor
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My camera can (read has) acquire an 18" traffic cone in a park seting at about 18', pretty much every time.
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