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<p>[QUOTE=&quot;physics-fan3.14, post: 3909615, member: 19165&quot;]Doug, the entire point of machine learning and training a neural network, as the OP is trying to do, is that it needs multiple inputs to learn. It *needs* a variety of data, so that it can be reliable across a broad spectrum of coins. If you only trained it on Heritage pictures, it would not be able to grade anything else. </p><p><br /></p><p>Your other quibbles are red herrings. Computer grading 20 or 30 years ago when they first tried it wasn&#039;t accurate because the technology just wasn&#039;t there. But, I&#039;m fairly certain that it would be achievable now.[/QUOTE]</p><p><br /></p>

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