[Greg McKaskle]

As mentioned earlier, the camera defaults to use adaptive exposure and white balance. While useful for some situations, when you want to ignore most of the light except for what you are providing, I'd recommend calibrating the camera and turning off the adaptive options.

You can control this in code or from the web page. I'd recommend logging into the camera web page, setting the color to Fluorescent 1 or another fixed setting, and for the exposure, expose the camera to a bright light for a few seconds, then set it to hold. Feel free to look at other camera settings.

This should help a lot. Feel free to post photos of what the camera is taking with the ring light and we may be able to help more. Also, it is important to use multiple criteria for selecting the target. If you use a single measurement it will be far less tolerant of noise. Two measurement areas covered in the white paper are shape and color/brightness.

White light is much more common, so most of the work will fall to shape measurements. If you can use a colored LED ring, that won't guarantee uniqueness, so I wouldn't eliminate shape, but you will typically have far fewer elements to consider.

Greg McKaskle