I've been looking various options to allow me to automate processing of some images.
I've looked at sips, which doesn't seem to provide an option for this.
Also I've considered writing a mac app to do this, however I can't find much example code which would do everything I need.
I've also looked at ImageMagik which seems to have this feature, but I can't find an example.
I wondered if anyone had acheived this and if do, could point me at an example. Alternatively a different tool which would allow me to do this?
Failing this a good source of mac cocoa source which would help me.
Lots of examples here http://www.imagemagick.org/Usage/compose/ - for example
composite -compose Copy -gravity South hand_point.gif rose: -alpha set compose_copy.gif