coloring edges that were black and white and overlaying on top of the original

[agator2]

http://i.imgur.com/nQTBL.png is a sample frame.

Those are droplets that I have isolated but want to make sure that they have retained their original dimensions. I would love to take the image I gave (actually one frame in a video) convert the white rings to a color and overlay the rings onto the original frame. 

I have been having trouble with the coloring and am completely intimidated by the overlay process.

[DFGray]

Most image analysis programs (including NI-Vision Development Module) will do this for you as part of identifying the blobs.  However, if you really want to roll your own, consider using ImageMagick to do the work.  ImageMagick is a command line and/or DLL based utility that can be called from LabVIEW to do image processing.