Adaptive Horizontal Filter
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This filter uses a piecewise scaling function to insure that the filter only affects the top layers of data. As it is now, the scaling function is the sum of a parabola (near the surface) and a Gaussian (below the surface). It is a bit confusing to me why it is written this way, and when I tried to use it I was surprised at how much this filter is changing the image below ~100 m.
I am thinking of changing to a tanh function with depth. Before I make any changes though, I wanted to make sure that this is leftover from stodeep and that is why it is currently confusing. @dlilien if you wrote it this way on purpose please let me know.
I didn't do this on purpose. It is also possible that I butchered the port from StoDeep on this one, I remember being quite confused as to why it was working the way it was.
Haha, I figured it wasn't you. Nick is under the impression that the St. Olaf undergrads intentionally made things more confusing than they needed to be as some sort of gate-keeping. In this case, it is possible that whoever wrote it just couldn't figure out a simpler way to do it. I can rewrite this function.