Correlated Multi-Jittered Sampling

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Tristan
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Joined: Fri Jun 29, 2012 1:27 pm

Correlated Multi-Jittered Sampling

Postby Tristan » Tue Jun 25, 2013 10:00 am

Hey guys, I came across this while reading over the new PRMan realease notes and thought it might be of interest to some of you:

http://graphics.pixar.com/library/Multi ... /paper.pdf

We present a new technique for generating sets of stratified samples on the
unit square. Though based on jittering, this method is competitive with low-
discrepancy quasi-Monte Carlo sequences while avoiding some of the struc-
tured artifacts to which they are prone. An efficient implementation is pro-
vided that allows repeatable, random access to the samples from any set
without the need for precomputation or storage. Further, these samples can
be either ordered (for tracing coherent ray bundles) or shuffled (for combin-
ing without correlation).


Sorry if it's old news!

- Tristan

Dade
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Joined: Fri Dec 02, 2011 8:00 am

Re: Correlated Multi-Jittered Sampling

Postby Dade » Tue Jun 25, 2013 3:30 pm

Very interesting, thanks.

fursund
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Re: Correlated Multi-Jittered Sampling

Postby fursund » Tue Jun 25, 2013 3:53 pm

Indeed very interesting! Don't think it's old news per-se, but just hasn't been advertised very much, oddly enough, since I guess it could be a "solution" for the NVIDIA QMC patent mess.

toxie
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Location: germany
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Re: Correlated Multi-Jittered Sampling

Postby toxie » Wed Jun 26, 2013 9:09 am

And entering the Pixar MC patent mess.. ;)
Better you leave here with your head still full of kitty cats and puppy dogs.

ingenious
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Re: Correlated Multi-Jittered Sampling

Postby ingenious » Wed Jun 26, 2013 10:48 am

When do NVIDIA's QMC patents expire exactly? I really don't like having to know how many samples I'll be taking in advance...
Image Click here. You'll thank me later.


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