ImageMagick Batch replacing color with transparency

ImageMagick Batch replacing color with transparency

http://graphicdesign.stackexchange.com/questions/16120/batch-replacing-color-with-transparency
http://www.mograblog.com/2013/04/removing-background-from-image-with.html
http://snippets.aktagon.com/snippets/558-how-to-remove-a-background-with-imagemagick
http://stackoverflow.com/questions/12424018/how-to-replace-white-background-color-with-transparent-of-an-image-in-imagemagic

http://www.imagemagick.org/discourse-server/viewtopic.php?t=18196
http://stackoverflow.com/questions/2322750/replace-transparency-in-png-images-with-white-background
http://stackoverflow.com/questions/10913944/set-background-color-opposite-of-transparent
http://stackoverflow.com/questions/12424018/how-to-replace-white-background-color-with-transparent-of-an-image-in-imagemagic
http://graphicdesign.stackexchange.com/questions/16120/batch-replacing-color-with-transparency
http://codeyarns.com/2014/11/19/how-to-set-background-color-in-imagemagick/
http://www.fmwconcepts.com/imagemagick/tidbits/image.php
http://superuser.com/questions/213336/using-graphicsmagick-or-imagemagick-how-do-i-replace-transparency-with-a-fill-c