from Hacker News

Stable Fiddusion: Frequency-domain blue noise generator

by cgadski on 11/16/23, 10:16 PM with 17 comments

  • by tlb on 11/17/23, 7:38 AM

    When you generate blue noise by shaping in the frequency domain and transforming, the samples are gaussian distributed, not uniform, as the author mentions. I wonder if you can transform to a uniform distribution by sorting the samples, choosing 256 bins of equal size, then quantizing each pixel into those bins. That would be fast: O(n log n) in number or pixels.

    Changing from gaussian to uniform is a distortion that presumably adds harmonics, but since they can only be higher frequencies than the original, the noise should still be blue.

  • by neoneye2 on 11/17/23, 7:46 AM

    The front page of this website has a 3d demo'ish interactive ui. Love it. https://acko.net/

    Great article.

  • by ReactiveJelly on 11/17/23, 2:51 AM

    Not related to ML/AI or Stable Diffusion.

    It's about generating 3D blue noise for rendering, it's very interesting on its own but the title is misleading.

  • by chupapimunyenyo on 11/17/23, 6:57 AM

    Why does this site block zooming on mobile? What's the reason? I won't read a reader hostile blog

  • by kookamamie on 11/17/23, 10:03 AM

    > noise generation is slow

    looks at the tool

    It's implemented in TS.