3 ms·
All I mean is that the statistics of the magnitude are different than the author expects, probably. You can certainly generate complex numbers with the magnitud
by cozzyd 5y ago
All I mean is that the statistics of the magnitude are different than the author expects, probably. You can certainly generate complex numbers with the magnitude, but picking from a uniform distribution is unlikely to generate what you want.
Also, it will certainly be a problem if the DC/Nyquist terms aren't pure real, though maybe that is actually being done and I missed it.
- dahart 5y ago> picking from a uniform distribution is unlikely to generate what you want. I see now, and I think this is a good point. Maybe I just said almost the same thing. Without looking at frequency plots, if I just think about what I expect to get with a DFT of high-pass filtered white noise, I’d assume it’s blue-ish in the sense of having less low frequency, but I don’t think I would expect it to produce the same perfectly even spread that the void-and-cluster algorithm produces. It seems like this implies that a forward DFT of a void-and-cluster blue noise texture has some structure that might be hard to see in frequency space, we can’t assume frequency noise that looks white really is white, and maybe there is a relationship between the frequency and phase components that just aren’t met by picking a random angle & radius.
- deleted 5y ago[deleted]
- cozzyd 5y agoYeah, looking up void and cluster, I think it's clear the phases won't be uncorrelated between frequencies, though may not be easy to describe in the frequency domain.