* Top: 1942 photograph of roadside sign which is skewed, and Bottom: digitally enhanced image which is not skewed
<ul><li>Uploader used Photoshop Elements to rotate original image; applied 'skew' function to correct for optical foreshortening; adjusted brightness and contrast and sharpness.</li></ul>
John Vachon
<p>Top image:
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<ul><li><a rel="nofollow" class="external free" href="https://loc.gov/item/2017814578">https://loc.gov/item/2017814578</a></li>
<li>Archive of source: <a rel="nofollow" class="external free" href="https://web.archive.org/web/20200801051244/https://loc.gov/item/2017814578">https://web.archive.org/web/20200801051244/https://loc.gov/item/2017814578</a></li></ul>