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#apertus IRC Channel Logs

2015/02/28

Timezone: UTC


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04:02
troy_s
Bertl: Greets Herbie.
04:08
Bertl
nice article
04:59
troy_s
Bertl: Well hopefully it's a step.
05:00
Bertl
yes, I hope many more will follow!
05:00
troy_s
Bertl: Would be nicer if more artists gave a flying fsck about color, given that with visual art, it is everything.
05:00
troy_s
(Frightening how few really understand what the hell is going on. I'm not exaggerating when I say that I don't believe many artists are even aware what RGB does. It simply isn't a question you ask when you "grow up with it.")
05:00
troy_s
#thedress
05:01
Bertl
I see it like this: for years, making CG films was something which required artists with deep rendering know how and a truckload of special equippment
05:02
Bertl
with the advance of technology, it becomes simpler, and artists who know little to nothing about CG can render films
05:02
Bertl
whether this is a good or bad thing depends on the perspective
05:03
Bertl
it's not so much different with color, although more subtle to understand
05:04
troy_s
Bertl: Part of the issue I believe is the invisibility of Blinn's law.
05:05
troy_s
Computing has sort of progressed dramatically while maintaining a rather false appearance of not-having-moved.
05:06
troy_s
For example, imaging in feature films went from 8 bit to 10 bit to 32 bit float etc., yet the base sort of “look” of the applications has often appeared almost identical.
05:06
troy_s
With things like Photoshop, a horrible legacy mess, artists haven't been exposed to alternate models because well... It is as though Photoshop formed the truth merely by ubiquity.
05:08
Bertl
that's the main problem of monopoly or as it is often called "state of the art" :)
05:11
Bertl
but I agree regarding "invisible" advances
05:11
troy_s
I think artists have used RGB for so long that what they are actually manipulating becomes skewed accordingly.
05:12
troy_s
For example, a common refrain when one asks what happens when you slide the green slider is “It makes the color more green.”
05:12
Bertl
same is true for the print folks with CMYK, which is even more weird :)
05:13
troy_s
Which is somewhat of a complex mangling of what it actually does. In essence, all it really does is increase the green light's intensity, yet it _does seem_ to make a mixed color more green.
05:13
troy_s
Even odder given that subtractive color is logarithmic. :)
05:13
troy_s
(Little nuance that sort of blindsided me.)
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06:32
Bertl
off to bed now ... have a good one everyone
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Bertl
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fsteinel_
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troy_s
Morn all.
14:22
Bertl_oO
morning troy_s!
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se6astian|away
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17:02
Bertl_oO
evening se6astian!
17:04
se6astian
good evening
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17:28
troy_s
se6astian: Greets.
17:30
se6astian
just started reading your article draft
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cbohnens|away
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19:10
MatthiasF
troy_s: Hello! you might also be interested in https://wiki.apertus.org/index.php?title=Noise_Reduction
19:11
troy_s
MatthiasF: Hacking away I see. ;)
19:11
troy_s
MatthiasF: Get back to the demosaicing damn you!
19:11
MatthiasF
Well, so long I find no PhD position I have plenty of free time ;)
19:12
troy_s
MatthiasF: I might suggest that for visualization that you adjust the transfer curve to normalize against the display referred value set.
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19:14
se6astian
troy_s: finished reading article, amazing work!
19:14
se6astian
lets throw in a few images and its ready to roll!
19:14
troy_s
I think you bring up a good point on the XYZ
19:14
troy_s
In terms of visualizations
19:15
troy_s
But I was constantly walking the "is this too much" line.
19:15
troy_s
I hate walls of text, and try desperately to avoid them; I would rather see several more nuanced explanations than one massive vomment.
19:15
troy_s
se6astian: You met MatthiasF?
19:16
troy_s
Damn brilliant mind working on his PhD in mathematics in signal theory. Heavy hitter if you manage to coax him into staying around.
19:17
troy_s
He introduced me to the cubic prefilter resampling routine, and has since explained the Sinc and Lanczos forms more thoroughly.
19:17
se6astian
not personally met, but we are chatting intensly :)
19:17
troy_s
He is damn brilliant.
19:17
se6astian
wonderful :)
19:17
troy_s
I tried to coax him to idle here.
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troy_s
Made me feel good too as I actually found a field he wasn't familiar with (color) which made me feel human.
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troy_s
Shhh there he is.
19:19
se6astian
:)
19:19
MatthiasF
I need a clean signal to for proper interpolation benchmarking
19:19
MatthiasF
And I need a better Wifi signal also !
19:19
MatthiasF
I suspect LTE interference
19:19
troy_s
?
19:19
troy_s
What do you mean by clean signal?
19:19
MatthiasF
without noise
19:20
troy_s
Well that is probably going to be a huge winding road.
19:20
MatthiasF
not too much at least
19:20
troy_s
Solve that Gordian knot and the Academy will line up to give you a technical achievement paper.
19:21
MatthiasF
heh, I only want to get rid of that strong DSPN noise
19:21
troy_s
se6astian: I wonder what the most cost effective spectrophotometer would be. I was thinking for the actual profiling it might be wise to make a light box.
19:22
troy_s
To generate high luminance samples in the green / yellows to really nail down the gamut of the sensor once the camera drops.
19:22
se6astian
lets ask google
19:22
troy_s
I know the Kleins are well respected
19:23
troy_s
But they are colorimeters
19:23
se6astian
I recently saw a sekonic spectrometer for 1700€
19:23
MatthiasF
troy_s: btw, to be clear, I'm not working on any PhD for now, I am looking for one ;)
19:23
troy_s
As such, they rely on the same filter based approach as any other tri-color array. Sub optimal for the sorts of zones we are heading.
19:24
troy_s
MatthiasF: Good luck with that. You are clearly not well equipped for such an effort.
19:24
troy_s
spit takes.
19:24
MatthiasF
I guess I am too much of a generalist :/
19:24
troy_s
LOL
19:26
MatthiasF
Really, I did my master in physics because CS would have been boring. Now it is hard for me to find a PhD outside physics.
19:26
troy_s
Head into imaging.
19:27
troy_s
Instant results.
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se6astian
http://www.ebay.at/itm/UPRtek-350-Spectrometer-/231488532877?pt=LH_DefaultDomain_0&hash=item35e5cab18d ?
19:32
se6astian
http://www.bhphotovideo.com/c/search?atclk=Lightmeter+Type_Spectrometer&ci=900&N=4077634543+4040100957
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sebix
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se6astian
time for bed
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se6astian
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cbohnens
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