OpenImageIO/oiio — pull request #765 by lgritz (2013-12-24 04:01:46+00:00)
Title: oiiotool --label lets you label and save the top image on the stack

At any point on the oiiotool command line '--label NAME' gives you a new name (alias) to the current top-of-stack image, with which you can refer to that image later on the command line, in the same manner that you would refer to a new image by filename.