ofxCV operator for img3 = img2 + img

hi,

I am just working on getting ofxCv ready for the 006 release. There is a list in the wiki here with various stuff:

http://wiki.openframeworks.cc/index.php-…-es-for-006

one of the items is a suggestion for operator overloading that allows you to do the following:

img3 = img2 + img

What are the arguments for this feature. My concern is that this is probably not a good idea because it hides expensive image copy operations.