macOS Looking for help/advice on using Accelerate framework

[lazydog]

Hi

I need to speed up a part of my program which compares two images to see how near identical they are. I'm not doing anything complicated, just subtracting rgb components, squaring and summing over the whole image to give a final double value. I can optimise the C code but what I would really like to do is take advantage of the Accelerate framework. Has anybody here used it? If so I would appreciate any advice and/or helpful pointers before I delve into it all.

thanks

b e n