[ptx] Registration testcases

[Edward Wildgoose]

> By having that, you didn't need anymore to worry about overexposure,
> underexposure, etc. Just take many pictures with different exposures and let
> have the algorithm solves that. Moreover, blending is really simplified.
> ... It's just an idea for future ...

Why stop there...?  Once you go down that route you can aim for super-resolution.

At the limit you could imagine holding down the trigger on your SLR, waving it around, and then having the pictures all aligned, overexposed and underexposed shots used to fill in fully dynamic range, and the overlapping shots used to create super-resolution images...  





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