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by lcrs
4616 days ago
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Last I played with FFT convolution it didn't end up being a win for any sane filter size, even compared to brute-force convolution with arbitrary non-separable kernels. Admittedly I was using off-the-shelf tools in Nuke, but I would imagine both their FFT and Convolve nodes are reasonably optimized. There's an analysis of the 1D case here with some interesting cautions at the end: http://www.engineeringproductivitytools.com/stuff/T0001/PT15... |
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