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<td class="small"><a class="nav" target="_blank" href="http://www.charlestown.pa.us">Charlestown
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<td class="small"><a class="nav" target="_blank" href="http://www.palivesteamers.org">Pennsylvania
Live Steamers</a><span class="smallgray"> � a club of large-scale railroading enthusiasts</span></td>
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<p class="topic"><i>Creating Plans, Then Models from Photos</i></p>
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<p>Photo scaling with the intent of interpreting the original dimensions of an object is
an application just made for a computer. Today�s tools provide a variety of methods for
filling in information gaps. The photos above show the morphing of a simple grab shot into
a head-on version of an obscured wall. The photo is stretched, color corrected, perspective
corrected, and pulled into a reasonable representation of the head-on. Sizes are checked
against known values, in this case, the mortar lines in the bricks, yielding dimensions
sometimes accurate within less than an inch.</p>
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