updated variableblur to version 0.2 Mainly optimization of the gaussian blur (now uses a 5x5 mask instead of 3x3) and the average blur(smarter algorithm resulting in a factor 20 to 100 speed increase). I'm thinking about renaming the gaussian blur to binomial blur because it works like that. With higher radius it aproaches the true gaussian blur more. With radius = 2 it's closest to a gaussian blur with SD=1 and with radius=7 it's closest to SD=2.
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