A while back (can't find the thread) we were discussing a service that provided measurements from photographs. I know how to do this in Photoshop in simple situations, but that's of little practical value to home inspectors as most photos depict the surface or object you want to measure in perspective (the size of an object in pixels is reduced as it's position recedes).
Well, today I found this:
http://www.adobe.com/designcenter/vi...op/?id=vid0019