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<p>[QUOTE=&quot;davidh, post: 2103564, member: 15062&quot;]What I&#039;m getting from all of this is that precise grading, except for as absolutely perfect MS70, is a sham.&nbsp; It&#039;s all subjective and any two persons or graders will often not see exactly the same thing.&nbsp; That&#039;s why many collectors will shop around to try and get the highest grade possible.&nbsp; Whether it&#039;s MS63 vs MS66, or VF35 vs XF40, or obverse vs reverse, there will always be disagreements.&nbsp; Although computer grading was never successful, I think that newer techniques could be developed that would overcome the shortcomings of the past, and would remove all subjectivity from the process.&nbsp; Something like dividing the image of the coin into a 225 square 25x25 grid (or larger or smaller, depending on the coin&#039;s size) and comparing it, square by square, to the design&#039;s perfect image.&nbsp; This could be done several times, with different lighting types and multiple lighting directions. That would pick up any weaknesses and flaws and develop an overall score as a percentage of deviation from the norm.&nbsp; The key is removing subjectivity from the process.</p><p><br /></p><p>I realize that computer grading isn&#039;t yet a polished art but it&#039;s day will come.&nbsp; If computers can read differences in fingerprints, they should be able to detect differences in the details of coins. </p><p><br /></p><p>For what it&#039;s worth, here&#039;s how PCGS does it&#039;s grading now [MEDIA=youtube]VTCSndJXS48[/MEDIA]&nbsp; </p><p>Two and three person grading reduces the subjectivity factor.</p><p><br /></p><p>And here was their method of computer grading <a href="http://www.google.com/patents/US5224176" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.google.com/patents/US5224176" rel="nofollow">http://www.google.com/patents/US5224176</a>[/QUOTE]</p><p><br /></p>

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