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<p>[QUOTE=&quot;TIF, post: 8252890, member: 56859&quot;]<img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie8" alt=":D" unselectable="on" unselectable="on" /></p><p><br /></p><p>Photoshop and then a free online animated gif maker (I&#039;ve used various ones; I think this one was with ezgif.com).</p><p><br /></p><p>It works best if at least one of the coins has strong devices and a good photograph (good focus and contrast).&nbsp; Whichever coin has the best contrast and focus is the one I reduce to an outline.&nbsp; In Photoshop Elements, I play around with contrast reduce shadows, then boost the lighting very very high until the fields are almost white, unless doing so obliterates the devices.&nbsp; Once it&#039;s as light as possible without sacrificing devices, I go to Filter &gt; Adjustment &gt; Threshold.&nbsp; Threshold will reduce it to black and white and with the slider I adjust it so that the fields are as white as possible but leaving as many device outlines as possible.&nbsp; After that, use the background eraser tool on the white portions, leaving the black outlines.</p><p><br /></p><p>From there you stack the outlines on pictures of the other coin and then tweak size and rotation.&nbsp; It&#039;s not hard if it&#039;s a die match.&nbsp; When one or more of the coins are not high grade or the photos are bad, it can be difficult to determine whether it&#039;s a die match.&nbsp; Generally, if you can find one strong feature, size and rotation can be adjusted to that and then you see if everything else is in the ballpark or not.</p><p><br /></p><p>Another confounding variable is whether the coins were planar to the lens when photographed because if they weren&#039;t... and that is usually the case with ancient coins the don&#039;t lie flat and with amateur photographers like most of us... you may also have skew the shape of one of the coins to correct for the distortion.&nbsp; Doing so can be guesswork.[/QUOTE]</p><p><br /></p>

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