adrienlucca
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Tag: math
August 24, 2012
Planck’s blackbody colors (first layers)
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This is a new thing.
For the moment I just did the first 2 layers of paint (depending on the case, Titanium White + Ultramarine Blue, or: Titanium White + Cadmium Yellow light,) – there are 2 left.
In the squares will be the average color (50%/50%) of the color of my background and of the colors of the planckian balckbody locus with temperatures from 4000 K° to 9500 K° – as given by these (approximative) formulae in the CIE UCS 1960 color space:
I choose to make these samples with the same brightness as my backgound, so only the color difference is visible. None of them is neutral grey because I’m working with illuminant D65 (my “white point” is there…,) which is not located on the planckian locus, but slightly blue-grennisher (see below)
The locus in the CIE UCS 1960 color space (after wikipedia)
July 26, 2012
D65 n°3 part II starts
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I’m gonna do a “lamp simulation” (a circular gradient with constant tint and varying brightness, based on the abstract model of a “perfect lamp,”) based on 11 colors: 3 times RGB with 3 levels of brightness (I dont enter into the detail of how I choosed them) and Black/White.
July 21, 2012
hi-resolution pictures of the prototype
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Light ON/OFF, hi-resolution orthographic panorama made with Hugin.
For me, there’s not much difference between such a work (the prototype, made of laserprints on paper) and a “traditionnal painting.”
I’m really starting to think it’s just the same thing, like Richter includes amateur photography in the field of “painting.”
July 19, 2012
about to end
The central part being equalized.
Something is slightly wrong – the values are increasing where the light is intense -, but it’s still very close to what I wanted (an equalized luminance everywhere in the rectangle).
July 10, 2012
good & bad news :)
The bad news: the laser printer cannot handle large black prints, some unit of the printer makes a random glossy layer on it.
the random gloss
the (very) good news id that the luminance correction is not very angle-dependant, means that except for that random gloss, the correction works at a wide variety of viewpoints, that’s really nice.
from the left side, the gloss dissappears and the flat is still “flat.”
below: zooms on different parts from the left side (same shutter speed)
June 27, 2012
wall to be visually uniformized: “ganzfeld” prototype
I will try to create a “ganzfeld” on this wall by subtracting light (using black printed patterns.)
This is the object of my residency at Netwerk, Aalst, BE, from last Monday to next Saturday.
More documents will come…
June 22, 2012
D65 lighting prototype @ JVE, Maastricht – 2011
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D65 Normlicht light tubes mounted with an aluminium reflector
”Table-Tops Room,” Jan van Eyck Academie, Maastricht, NL, 2011
June 6, 2012
D65 #3 1st “fake lamp”
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June 4, 2012
D65 #3 sunlight picture
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I just came back from a long journey, the blog will be re-updated regularly soon.
°
May 16, 2012
fake Light, 1st TW pass (in progress…)
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The lightness will change as if there was a perfect lamp at 17 cm from the center of the figure.
The white structure appears really “transparent.”
This geometrical solution could be called the “pixel solution,” since the surface is divided in 2×2 cm squares, other solutions are possible and will be tried later on the study: concentric zones, gradients… The only color added to the grey background is Titanium White (TW), later I’ll try color, enjoy ;)
May 14, 2012
transparent square
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Fine-tuning of titanium-White and carbon-Black to “match’ the lightness of the grey background. Bizarre: following my measurements it was supposed to disappear in the middle, maybe a mistake…
detail below, click to zoom!
May 14, 2012
(will) disappear
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Fine-tuning of titanium-White and carbon-Black to “match’ the lightness of the grey background.
