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<p>[QUOTE=&quot;KurtS, post: 2064915, member: 11786&quot;]I&#039;d like to share a technique I use to build 3D models of ancient coins that can be studied from any angle. They&#039;re fun to look at, and sometimes you notice things you haven&#039;t seen before. The technique uses &quot;focus stacking&quot;, a way to create sharp composite pictures of high relief coins from many individual shots.</p><p><br /></p><p>The first step is to shoot a coin using many small focus increments that capture both the high points and the low points (such as the rim). From that, a depth map is generated that is to be used to create a 3D simulation. The software used is Helicon Focus.</p><p><br /></p><p>If you look closely, you can see the steps on the depth map, representing focus increments.</p><p><img src="https://farm8.staticflickr.com/7541/15977008372_51a33f9214_c.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p>The resulting model can be rotated at any angle to show details of the relief:</p><p><img src="https://farm8.staticflickr.com/7578/15351236304_61977bc26d_h.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p>Perhaps the most interesting use of the depth map is creating a 3D animation of the coin:</p><p>[MEDIA=youtube]quDCnOV8BGI[/MEDIA]</p><p><br /></p><p>Finally, the focus-stacked obverse and reverse:</p><p><img src="https://farm9.staticflickr.com/8600/16130652692_c82a2ace26_h.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" />[/QUOTE]</p><p><br /></p>

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