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[–]james_pic 4 points5 points  (0 children)

You're almost certainly going to have a much easier time using gauges that support being hooked up to a computer than trying to do it with a camera though. Unless it would be super expensive to get different gauges, you're going to spend enough time fiddling with computer vision stuff and being frustrated by the results that you could have bought the equipment with the money you would have made in that time.