danwills

26 ms·

271.
by danwills 5y ago
Three of my favourite things!: reaction-diffusion, fractals, and cruciferous vegetables! I thought that they could have had a better go at describing the mechanism (or even how any of the models worked). The actual Nature paper is of course
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by danwills 5y ago
I was, similarly to some things Kai says here very inspired to find ever more 'dense' areas in fractals, full of detail everywhere. I found two basic ways to find fractals that appear to be 'detailed everywhere' rather t
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by danwills 5y ago
It seems to me that with humans making so much of these 'harmless' (or at least relatively-low-toxicity) plastics, we have essentially created a giant niche waiting there for the first micro (or even perhaps macro) organism(s) tha
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by danwills 5y ago
Yeah Kefir is usually only slightly thicker than buttermilk, but it can be strained to make it thicker. It doesn't form solid curds like yoghurt though, but has its own particular fractal-y curd structure. When not in use I just put th
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by danwills 5y ago
I think this might be because a large part of what Instagram filters do /is/ just color grading.
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by danwills 5y ago
Yeah totally! Some of the ideas from openEXR seem like they could help a lot here! Of course there's nothing stopping ppl from storing not-linear pixel values in whatever color space you like in an exr file, but at least the format can
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by danwills 5y ago
I found this: https://developer.nvidia.com/gpugems/gpugems3/part-iv-image-... This is about working with linear-to-light values on GPUs however the issues in VFX are largely the same.
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by danwills 5y ago
In VFX for film, color is a huge issue too. What companies mostly do is to try to use a 'linear-to-light' color-space internally, pre-linearizing turned-over footage before working with it, and then post-transforming the final com
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by danwills 5y ago
Apologies, should have read the link.. which is indeed about following a yoghurt-like process using milk kefir grains! But you don't have to do it that way, it can be really easy!
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by danwills 5y ago
Milk kefir usually doesn't require any temperature control, it just goes faster when the ambient temp is higher. I believe the idea is that the kefir 'team' is able to easily outcompete any weed microorganisms. For me it&#x27
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by danwills 5y ago
It's so handy to have functions that evaluate to either the derivative or the integral for a particular (version of a) shaping function like smoothstep. Analytic integration has yielded some of the most stunning optimizations in graphi
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by danwills 5y ago
For some types of system, searching through all possible rules for the behaviour that you want isn't out of the question, and can sometimes lead to finding a solution faster than wandering around in parameter-space (either along a dire
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by danwills 5y ago
Hooray for any tool (or workflow) that makes it easier to work with otherwise-abstract formulas! This way sounds to me like a handy method for everyday in-mind adding and subtracting too.. I definitely aspire to upgrade my understanding of
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by danwills 5y ago
I agree that's the intended sense of what was said, but what a fascinating side-track! I can readily imagine the idea of illegal "states of mind" (1984/Orwell style: simply things the state made a law stating that it&#x2
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by danwills 5y ago
"Another Brick in the Wall - Part II" is the song, and it's by Pink Floyd, not Led Zeppelin.
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by danwills 5y ago
Although they could call this an automata, I think it's incorrect to call it a CA as it's not cell-neighbourhood based: "A cellular automaton consists of a regular grid of cells, each in one of a finite number of states, such
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by danwills 5y ago
I don't think you could really call this a cellular automata, as that's defined by the cellular-neighbourhood-processing update rule. To put it another way, this looks like a 'vector' simulation (or automata) compared to
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by danwills 5y ago
Crikey, What a lot of fun! Thanks to Eleuther for making this available to play with! Here's my prompt (I'm into fractals, and I have a feeling that neural nets are loosely exploring in some fairly fractal spaces internally so I t
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by danwills 5y ago
Here here! This format stands right in the way of simply reading.
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by danwills 5y ago
I gave up after the first section after mashing some bits of the 'UI' to try to read the next bit.. simply posting a link could provide a far better reading experience imo.
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by danwills 5y ago
And as long as it hasn't been pasteurized, is a living probiotic too. (though I prefer milk kefir myself)
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by danwills 5y ago
I'm somewhat left wondering what really happens to the high frequency bits? Can they move around a lot like in the style-transfer examples early in the video? It seems a bit like this method assumes the image will not be 'deformed
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by danwills 5y ago
Agreed! And in cases where the convolution kernel (bokeh, but in frequency space) is something more complicated than gaussian, FFT can definitely be a very good option (kernel/bokeh-res can be near-ish to the res of the image-to-convol
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by danwills 5y ago
This doesn't use wavelets afaics (they are not mentioned in the article), it uses something called 'Laplacian Pyramid'. That can be used separate a signal by frequency but seems to do the whole image at once. Looks to be the
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by danwills 5y ago
Yep you're totally right! Apologies.. I had always thought the 'zoa' on the end meant they were animal. TIL about metazoa! thanks!
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by danwills 5y ago
Fascinating, the possibilities for such different patterns/behavior of space+energy+matter at different pressures, temperatures (scales) etc! There is so much left to discover here. I do love the idea of potential forms of life in the
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by danwills 5y ago
From the article: Mariana Snailfish (found at depths beyond 26,000 feet (~8000m): > These extremophiles only grow to be around 11 inches long, but despite their small size, they are among the top predators of their realm. They consume ti
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by danwills 5y ago
Yeah very interesting but I had trouble with the units too. Had to jump out to convert imperial to metric a few times. It really seems like very little effort to provide both units (metric could go in parentheses if imperial is default) I w
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by danwills 5y ago
Currently that Wikipedia page has an inexplicable (hillarious?) image of a bush turkey on it, can't really see the connection.. but didn't try to find out how it got there either.
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by danwills 5y ago
There are even microscopic single-celled animals, such as Amoeba: https://en.m.wikipedia.org/wiki/Amoebozoa

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