Quote:
Originally posted by Didée
In case of yv12convolution, I cheated a little: since I was too lazy to create Pascal's Triangle up to the 34th line, I made radius=16 by applying 4 times radius=4 ("1 8 28 56 70 56 28 8 1"). Dunno wether or not this put any penalty on yv12convolution, but still ...
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That's a radius=2 gaussian, and convolving 4 of them gives you a radius=4, not 16.
Likewise, you have to chain 256 blur(1)'s to get a radius=16 gaussian.