I did sort of figure out the image sampler thing.  Do you need help with something similar?

I ended up having to create a graphic language for showing the information.  Visualizing this information is a challenging task.  You have to or will go through many iterations of how to get your point/info across.  So I will ask you, what are trying to do with this information?  And are you looking at a per pixel data value?  Could you send me a link to the image I posted?  Also, what kind of timeline are you working with?  I am pretty busy today during the day, but should have some time this evening or Sunday.