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DHT Issues in near-nodata regions

Falka, As the guy who sat in the office next to yours, i figured i'd come on and say thank you for your help this summer!

On a more technical note, taking a closer look at the imagery generated utilizing DHT, we found some artifacts in near-nodata (CFA ~= 0) regions of an image (or if you just hack off the bottom end prior to passing it into DHT). I believe these are just integer wrap-arounds.

lexa, we'll be sure to look into compiling with OpenMP!