Noise

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Offline Kalter Rauch

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« on: September 07, 2017, 01:08:31 AM »
From GIMP "solid noise" filter...

« Last Edit: October 09, 2017, 08:51:23 PM by Kalter Rauch »

Offline Kalter Rauch

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« Reply #1 on: September 10, 2017, 10:57:02 PM »
Using a GIMP "Tubulence/Fractal Noise" filter,
desaturated to greyscale and used colored lights
to make any color the result of reflected light...


Offline Kalter Rauch

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« Reply #2 on: September 11, 2017, 02:42:35 AM »

Offline v

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« Reply #3 on: September 11, 2017, 05:38:18 PM »
Noise might be the true anti-fractal since it is, by definition, not self similar.

Offline Kalter Rauch

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« Reply #4 on: September 12, 2017, 01:23:36 AM »
OK then...say I start with noise like TV snow.
Imagine a set of parameters that can generate it,
and each variable can have a certain range of action.
Also...when blind-tweaking those adjustments
there are "improvements" in the sense of looking "better"...
maybe the path towards what looks "right"
is fractal in nature.

Offline Kalter Rauch

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« Reply #5 on: September 12, 2017, 10:01:22 PM »
For instance, there is a setting called anisotropy
which may increase sharpness
but beyond that point
features become "snakelike".

Also, there is a phenomenon called "stochastic resonance"
in which, I think, 2 or more disparate noise variables (color, sound, etc.)
cause synergetic effects between such variables.
I think they use it in "Deep Dream" algorithms.

Offline Kalter Rauch

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« Reply #6 on: September 16, 2017, 01:01:53 AM »



Offline Kalter Rauch

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« Reply #7 on: September 16, 2017, 03:57:48 AM »

Offline Kalter Rauch

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« Reply #8 on: October 12, 2017, 08:44:56 PM »
Noise might be the true anti-fractal since it is, by definition, not self similar.

Here's an article on this subject...

http://libnoise.sourceforge.net/glossary/index.html#perlinnoise

"Each coherent-noise function that is part of a Perlin-noise function is called an octave. These functions are called octaves because each function has, by default, double the frequency of the previous function; musical tones have this property as well. Perlin noise generated with more octaves produce more detailed coherent noise, at a cost of additional calculation time.
Perlin noise is fractal in nature; a zoomed-in section of Perlin noise tends to look like the original section. Natural objects also have this property; for example, a twig from a tree resembles a branch of the tree, which in turn resembles the original tree. Because of this property, Perlin noise is ideal for generating natural, self-similar textures such as granite, wood, marble, and clouds. It is also ideal for generating realistic terrain.
Ken Perlin invented Perlin noise in ~1983. Because his invention is used everywhere in the special-effects industry, he won an Academy Award?. "

Offline Kalter Rauch

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« Reply #9 on: October 12, 2017, 08:48:43 PM »



Offline Kalter Rauch

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« Reply #10 on: November 20, 2017, 01:04:46 AM »
The next 2 images started as Juliabulb
with added Perlin FBM Transformation and Perlin Noise Coloring...





Offline Kalter Rauch

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« Reply #11 on: December 30, 2017, 10:43:33 PM »
GIMP solid noise followed by ~10 layers of colored fog, misc. filters...




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My Noise (and music)

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