most recent 30 from superuser.com 2010-03-21T08:01:02Z http://superuser.com/feeds/question/74081 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://superuser.com/questions/74081/can-photoshop-extract-similar-content-from-two-dissimilar-images 2 Collin Allen http://superuser.com/users/4876 2009-11-23T01:16:55Z 2009-11-23T01:25:33Z

<p>I have two fairly different image files, except for a single element in the photo. Is there a procedure that can be done in Photoshop (or any other app, for that matter) to extract a mask for that element? When applied, I'd like that mask to remove the background, such that the resulting image (with transparency) can be re-used elsewhere.</p> <p><img src="http://cdn.command-tab.com/2009/psd%5Fexample.jpg" alt="Image extraction example" title=""></p> <p>I can arrange one over top of the other, change the upper layer's Blending Mode to Difference, then line up the pieces and see my target appear as a black area, but that doesn't seem to get me all the way there.</p>

http://superuser.com/questions/74081/can-photoshop-extract-similar-content-from-two-dissimilar-images/74083#74083 1 NSD http://superuser.com/users/14197 2009-11-23T01:25:33Z 2009-11-23T01:25:33Z

<p>There's nothing that would do that automatically and yield satisfactory results, but you could get most of the way there with a series of channel calculations. </p> <p><a href="http://help.adobe.com/en%5FUS/Photoshop/11.0/WSFC798FF0-F7E7-4792-814D-808CCC1DCBD3a.html" rel="nofollow">http://help.adobe.com/en%5FUS/Photoshop/11.0/WSFC798FF0-F7E7-4792-814D-808CCC1DCBD3a.html</a></p>