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Hi,
I decided to try to enter the IRTC competition... I got a great idea
and I've been searching for information on my idea and I think it should
be very nice... or... I hope so! =)
I got a problem with color choice... Usually, i only pick from the
three R, G and B, and there is no problem, but my project requires 4
colors this time and I wonder what colors to choose.. ( I must not
choose blank nor white) On top of that, there is already a few colors
taken, like Blue, Green, Brown (light and dark)... Though I think I
could repick Blue and Green... so I'd need either two more colors or
better 4 more colors... I need my colors to be colorful (!) and
attractive and most possibly contrasting.
If any of you can come with a choice to help me out, I'd greatly
appreciate! I'm very bad with colors, I have a cerebral disfunction
which in french is called "daltonisme", I don't know what it is in
english but it make the red pigmentation wrong in my perception. So if
I see a brown color and a red color (depending on lighting) they might
look exactly the same... or if I see two different shades of red (pink
or whatever contains red) I will have much difficulty distinguishing
which is the darkest...
This said, I'm having trouble choosing good looking colors, because I
don't really know colors, I like R, G and B because they are the primary
colors of optics, they are Fact. I might eventually look in a
dictionnary to find a mythological connotation of my chosen colors, but
this might not be of use in the final image.
Anyway, I need to choose 4 colors, thanks for any help!
Xilo
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On Sat, 19 Apr 2003 16:20:30 +0500, Xilo Musimene <xil### [at] hotpop com> wrote:
> I need my colors to be colorful (!)
> I have a cerebral disfunction which in french is called "daltonisme",
> I don't know what it is in english
In English it is spelt Daltonism commonly called Colour Blindness . Why not use
the inverse of RGB; cyan, magenta and yellow.
Regards
Stephen
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Xilo Musimene wrote:
> Anyway, I need to choose 4 colors, thanks for any help!
Most people, who don't know about the RGB colour space, regard yellow as
a primary colour along with red, green and blue.
In the rainbow you have red, orange, yellow, green, blue and purple.
/Ib
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Entre otras cosas, Xilo Musimene tuvo a bien escribir:
> I got a problem with color choice... Usually, i only pick from the
> three R, G and B, and there is no problem, but my project requires 4
> colors this time and I wonder what colors to choose.. ( I must not
> choose blank nor white) On top of that, there is already a few colors
> taken, like Blue, Green, Brown (light and dark)... Though I think I
> could repick Blue and Green... so I'd need either two more colors or
> better 4 more colors... I need my colors to be colorful (!) and
> attractive and most possibly contrasting.
When 4 colours are needed (in board games, for example) it's usual to pick
Red, Blue, Green and Yellow, you can add some kind of Purple. Other
"secondary" colours like cyan and orange begin to lose contrast.
> If any of you can come with a choice to help me out, I'd greatly
> appreciate! I'm very bad with colors, I have a cerebral disfunction
> which in french is called "daltonisme", I don't know what it is in
> english but it make the red pigmentation wrong in my perception. So if
> I see a brown color and a red color (depending on lighting) they might
> look exactly the same... or if I see two different shades of red (pink
> or whatever contains red) I will have much difficulty distinguishing
> which is the darkest...
In case you don't know, it was John Dalton, the father of the Atomic Theory,
who gave name to daltonism, he was colour blind and studied that condition.
I've always wondered how would colour blind persons see the colours, in
fact, I wonder how do other people see the colours: do other people
experience the same "feeling" when seeing blue as I do? They receive some
sensation when looking at the sky, and they call it "blue", I do the same
thing, but this doesn't mean that the sensation is the same...
--
light_source{9+9*x,1}camera{orthographic look_at(1-y)/4angle 30location
9/4-z*4}light_source{-9*z,1}union{box{.9-z.1+x clipped_by{plane{2+y-4*x
0}}}box{z-y-.1.1+z}box{-.1.1+x}box{.1z-.1}pigment{rgb<.8.2,1>}}//Jellby
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Don't use such an obtuse color choice scheme.
Q: What is your image **about**?
Answer this question, then consult a color style book for combinations of
colors that would reflect this feeling.
I found "Designer's Guide to Color: 5" for $6 at a discount book store.
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On Sat, 19 Apr 2003 18:16:32 -0400, Jellby quoth:
> In case you don't know, it was John Dalton, the father of the Atomic
> Theory, who gave name to daltonism, he was colour blind and studied that
> condition. I've always wondered how would colour blind persons see the
> colours, in fact, I wonder how do other people see the colours: do other
> people experience the same "feeling" when seeing blue as I do? They
> receive some sensation when looking at the sky, and they call it "blue",
> I do the same thing, but this doesn't mean that the sensation is the
> same...
According to my father, who has red-green color blindness, red and green
both appear as different shades of the same rather bland color. Colors
that contain significant amounts of red or green are also affected, so for
example peanut butter is "green", and light pink and light grey look about
the same.
--
Mark Wagner
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> In the rainbow you have red, orange, yellow, green, blue and purple.
Hmmm, isn't there 7 colors in the rainbow?
Thanks!
Xilo
--
Dedicated to audio/visual and interactive artwork.
Author of The Primary Colors of CSound:
http://www.geocities.com/simonlemieux/PCCS/index.html
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> In English it is spelt Daltonism commonly called Colour Blindness .
Thanks! More vocabulary for me! =)
> Why not use
> the inverse of RGB; cyan, magenta and yellow.
Yes... combined with any of the RGB would make four colors...
interesting, I'll check what it looks like at the end...
Thanks,
Xilo
--
Dedicated to audio/visual and interactive artwork.
Author of The Primary Colors of CSound:
http://www.geocities.com/simonlemieux/PCCS/index.html
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> When 4 colours are needed (in board games, for example) it's usual to pick
> Red, Blue, Green and Yellow, you can add some kind of Purple. Other
> "secondary" colours like cyan and orange begin to lose contrast.
oh! This is good! I believe it's the same kind of colors that are used
in maps to make every adjacent territories have a different color... Good!
> In case you don't know, it was John Dalton, the father of the Atomic Theory,
> who gave name to daltonism, he was colour blind and studied that condition.
I didn't... I wonder if working in an atomic lab for long can render
someone color blind! hehe
> I've always wondered how would colour blind persons see the colours, in
> fact, I wonder how do other people see the colours: do other people
> experience the same "feeling" when seeing blue as I do? They receive some
> sensation when looking at the sky, and they call it "blue", I do the same
> thing, but this doesn't mean that the sensation is the same...
Well, I came to a good personnal explanation of how things work in my
brain...
Consider the perception of colors on the retina as a POV pigment{} for
every pixels of my vision... Then think that we see a 24bit image
containing information for Red, Green, Blue. Then there is 8bits for
every colors, combined they form the 24bit image normal people "see".
But my daltonism makes the Red pigment shrink to... say 4 bits. Red
pigment looses precision. My view is of 20bits. But my brain only
accepts 32bit, so at some place the red pigment is scaled to 8bit, and
unfortunately, the scaling is done unproperly, so the final image I see
is wrong or imprecise.
As for sensation, you see, color is a perceived information, nothing
more, the information is always and ever 24bits long. And this said,
the information will make the same kind of sensation in me because once
the color has been processed, my cognitive judgment of the color is not
affected by daltonism...
So, I believe, I see everything as you guys do... But I would have
difficulty identifying precise shades of color. In the army, if I'd go
to war in a jungle, where everything is green/brown and then ennemy is
also dressed in green/brown clothes, I would definately have a hard time
finding the ennemy!
Hope this answers your wonders!
Xilo
--
Dedicated to audio/visual and interactive artwork.
Author of The Primary Colors of CSound:
http://www.geocities.com/simonlemieux/PCCS/index.html
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> According to my father, who has red-green color blindness, red and green
> both appear as different shades of the same rather bland color. Colors
> that contain significant amounts of red or green are also affected, so for
> example peanut butter is "green", and light pink and light grey look about
> the same.
I'm not sure if this is a true fact, but I heard that only the Red
information was wrong by daltonism. And the brain interprets the color
in some way that makes any color containing red to be blended somehow...
Even when I see a pure Blue thing, I can't say for sure that it's blue,
it might contain some red pigments that I don't perceive...
Xilo
--
Dedicated to audio/visual and interactive artwork.
Author of The Primary Colors of CSound:
http://www.geocities.com/simonlemieux/PCCS/index.html
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> Don't use such an obtuse color choice scheme.
>
> Q: What is your image **about**?
Well, you see, i'm used to programming with OpenGL (interactive 3D, like
3D games, etc..) and I often program abstract screensavers and when I
have to chose the colors I simply rely on the 3 RGB...
But now that I'm doing a project for povray, I will probably eventually
change the way I use colors...
Actually, I might even use different kind of metals like bronze, silver,
gold, etc... I'm not sure, I'm just stuck with the color choice and if
I get a simple good color choice, I'll use it, then when the image is
done, I'll change the colors to better looking ones!
Xilo
--
Dedicated to audio/visual and interactive artwork.
Author of The Primary Colors of CSound:
http://www.geocities.com/simonlemieux/PCCS/index.html
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Xilo Musimene wrote:
>> In the rainbow you have red, orange, yellow, green, blue and purple.
>
>
> Hmmm, isn't there 7 colors in the rainbow?
Which one do you miss? (Actually, there is infinitely many colors in the
rainbow :)
/Ib
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> Which one do you miss? (Actually, there is infinitely many colors in the
> rainbow :)
Well, i don't know, but since I'm a kid I've been told there were 7
colors in a rainbow, though I know for having done some optical physics
at school that there is the whole visible spectrum.
But I was wondering what were the 7 colors I've been told when I was a
kid...
Xilo
--
Dedicated to audio/visual and interactive artwork.
Author of The Primary Colors of CSound:
http://www.geocities.com/simonlemieux/PCCS/index.html
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On Sun, 20 Apr 2003 04:04:08 +0500, Xilo Musimene <xil### [at] hotpopcom> wrote:
>But I was wondering what were the 7 colors I've been told when I was a
>kid...
>
Roy G Biv
Red, Orange, Yellow, Green, Blue, Indigo and Violet.
Personally I only ever see a maximum of six in nature, the Blue, Indigo and
Violet seem to be so close in hue they blend into two colours. In a darkened lab
I'm sure I saw the seven but I wanted to, that may have helped.
Regards
Stephen
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Xilo Musimene <xil### [at] hotpopcom> wrote in news:3EA### [at] hotpopcom
[...]
main "colors" in common interpretation, colud be :
gray- rgb 1 rgb 0 rgb .5
RGB- rgb x rgb y rgb z
CMY- rgb x+y rgb y+z rgb z+x
and maybe also brown collor about ~ <1,.7,.3> and orange ~ <1,.7,.1>
--
#macro g(U,V)(.4*abs(sin(9*sqrt(pow(x-U,2)+pow(y-V,2))))*pow(1-min(1,(sqrt(
pow(x-U,2)+pow(y-V,2))*.3)),2)+.9)#end#macro p(c)#if(c>1)#local l=mod(c,100
);g(2*div(l,10)-8,2*mod(l,10)-8)*p(div(c,100))#else 1#end#end light_source{
y 2}sphere{z*20 9pigment{function{p(26252423)*p(36455644)*p(66656463)}}}//M
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Among other things, Xilo Musimene wrote:
>> In case you don't know, it was John Dalton, the father of the Atomic
>> Theory, who gave name to daltonism, he was colour blind and studied that
>> condition.
>
> I didn't... I wonder if working in an atomic lab for long can render
> someone color blind! hehe
I was talking of XVIII century, Dalton postulated elements were made out of
atoms which combined to form compounds, there were no neutrons or gamma
rays back then ;)
--
light_source{9+9*x,1}camera{orthographic look_at(1-y)/4angle 30location
9/4-z*4}light_source{-9*z,1}union{box{.9-z.1+x clipped_by{plane{2+y-4*x
0}}}box{z-y-.1.1+z}box{-.1.1+x}box{.1z-.1}pigment{rgb<.8.2,1>}}//Jellby
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Among other things, Ib Rasmussen wrote:
> Most people, who don't know about the RGB colour space, regard yellow as
> a primary colour along with red, green and blue.
Actually, when I was a child I was taught basic colours were red, blue and
yellow. Secondary colours would be green (blue + yellow), purple (red +
blue) and orange (yellow + red), cyan looks like a light blue.
I know this doesn't comply with colour theory, but it works when using real
paints (and when you're 6) ;)
--
light_source{9+9*x,1}camera{orthographic look_at(1-y)/4angle 30location
9/4-z*4}light_source{-9*z,1}union{box{.9-z.1+x clipped_by{plane{2+y-4*x
0}}}box{z-y-.1.1+z}box{-.1.1+x}box{.1z-.1}pigment{rgb<.8.2,1>}}//Jellby
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In article <3EA### [at] hotpopcom>,
Xilo Musimene <xil### [at] hotpopcom> wrote:
> > In the rainbow you have red, orange, yellow, green, blue and purple.
>
> Hmmm, isn't there 7 colors in the rainbow?
Uh...the rainbow contains the entire spectrum. It has every color
possible with a single wavelength. It would look quite strange with 7
colors.
--
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/
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In article <3ea2c000@news.povray.org>, Jellby <jel### [at] M-yahoocom>
wrote:
> Actually, when I was a child I was taught basic colours were red, blue and
> yellow. Secondary colours would be green (blue + yellow), purple (red +
> blue) and orange (yellow + red), cyan looks like a light blue.
>
> I know this doesn't comply with colour theory, but it works when using real
> paints (and when you're 6) ;)
That's subtractive color, or CMY: "blue" == cyan, "red" == magenta. The
crayons are close enough you can use the same rules and get something
close to the desired result, though proportions are different.
--
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/
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On Sun, 20 Apr 2003 02:43:51 +0500, Xilo Musimene <xil### [at] hotpopcom>
wrote:
>Hmmm, isn't there 7 colors in the rainbow?
When I was a kid, I was taught the colors of the rainbow using the
name of a guy called "Roy G. Biv". That's Red, Orange, Yellow, Green,
Blue, Indigo, Violet.
Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] vipbg
TAG e-mail : pet### [at] tagpovrayorg
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> Red, Orange, Yellow, Green, Blue, Indigo and Violet.
>
> Personally I only ever see a maximum of six in nature, the Blue, Indigo and
> Violet seem to be so close in hue they blend into two colours. In a darkened lab
> I'm sure I saw the seven but I wanted to, that may have helped.
Ok, good, I took note of it... actually I'm just thinking it might be
extremely wonderful to add a rainbow in my project!
Thanks,
Xilo
--
Dedicated to audio/visual and interactive artwork.
Author of The Primary Colors of CSound:
http://www.geocities.com/simonlemieux/PCCS/index.html
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> Uh...the rainbow contains the entire spectrum. It has every color
> possible with a single wavelength. It would look quite strange with 7
> colors.
Yes, I knew that, but you know that when children are drawing their
firsts drafts, they draw a horse, a house, the familly with a rainbow
and they ask what colors are in a rainbow. I remember having identified
7 colors of the full spectrum that were known to be visually very
identifiable when looking at a rainbow. It is those 7 colors I wish to
know (though it's already been answered elsewhere in this thread).
Thanks,
Xilo
--
Dedicated to audio/visual and interactive artwork.
Author of The Primary Colors of CSound:
http://www.geocities.com/simonlemieux/PCCS/index.html
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> When I was a kid, I was taught the colors of the rainbow using the
> name of a guy called "Roy G. Biv". That's Red, Orange, Yellow, Green,
> Blue, Indigo, Violet.
WOW! This is the most incredible memory helper I've ever heard! (I know
a sentence that names the planet of the solar system in order, but this
is very fun!)
I'll try to remember it too!
Thanks Peter,
Xilo
--
Dedicated to audio/visual and interactive artwork.
Author of The Primary Colors of CSound:
http://www.geocities.com/simonlemieux/PCCS/index.html
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> Actually, when I was a child I was taught basic colours were red, blue and
> yellow. Secondary colours would be green (blue + yellow), purple (red +
> blue) and orange (yellow + red), cyan looks like a light blue.
>
> I know this doesn't comply with colour theory, but it works when using real
> paints (and when you're 6) ;)
Well those colors work in the Pigment theory, but in the Optics theory
it's quite different, though the Pigment and Optic theory are linked as
Pigment reflects Optics in a special manner...
Xilo
--
Dedicated to audio/visual and interactive artwork.
Author of The Primary Colors of CSound:
http://www.geocities.com/simonlemieux/PCCS/index.html
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>
> I was talking of XVIII century, Dalton postulated elements were made out of
> atoms which combined to form compounds, there were no neutrons or gamma
> rays back then ;)
>
Ok, now I understand what you were talking about... the atomic theory,
about the atoms, in no way (well, mostly) related to nukes! ;)
Thanks,
Xilo
--
Dedicated to audio/visual and interactive artwork.
Author of The Primary Colors of CSound:
http://www.geocities.com/simonlemieux/PCCS/index.html
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> RGB- rgb x rgb y rgb z
>
> CMY- rgb x+y rgb y+z rgb z+x
That's interesting, I did not know the relationship between to two color
"formats"...
Thanks Rafal!
Xilo
--
Dedicated to audio/visual and interactive artwork.
Author of The Primary Colors of CSound:
http://www.geocities.com/simonlemieux/PCCS/index.html
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Among other things, Xilo Musimene wrote:
>> When I was a kid, I was taught the colors of the rainbow using the
>> name of a guy called "Roy G. Biv". That's Red, Orange, Yellow, Green,
>> Blue, Indigo, Violet.
>
> WOW! This is the most incredible memory helper I've ever heard! (I know
> a sentence that names the planet of the solar system in order, but this
> is very fun!)
>
> I'll try to remember it too!
How I like a drink, alcoholic of course, after the heavy chapters involving
quantum mechanics...
Now count the letters in the words: 3.14159265358979... Does it look
familiar? ;)
--
light_source{9+9*x,1}camera{orthographic look_at(1-y)/4angle 30location
9/4-z*4}light_source{-9*z,1}union{box{.9-z.1+x clipped_by{plane{2+y-4*x
0}}}box{z-y-.1.1+z}box{-.1.1+x}box{.1z-.1}pigment{rgb<.8.2,1>}}//Jellby
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Among other things, Xilo Musimene wrote:
>> Actually, when I was a child I was taught basic colours were red, blue
>> and yellow. Secondary colours would be green (blue + yellow), purple (red
>> + blue) and orange (yellow + red), cyan looks like a light blue.
>>
>> I know this doesn't comply with colour theory, but it works when using
>> real paints (and when you're 6) ;)
>
> Well those colors work in the Pigment theory, but in the Optics theory
> it's quite different, though the Pigment and Optic theory are linked as
> Pigment reflects Optics in a special manner...
It's an approximation to subtractive colour theory, valid for everyday
crayons and for children (how many chindren do know what "magenta" and
"cyan" are?).
--
light_source{9+9*x,1}camera{orthographic look_at(1-y)/4angle 30location
9/4-z*4}light_source{-9*z,1}union{box{.9-z.1+x clipped_by{plane{2+y-4*x
0}}}box{z-y-.1.1+z}box{-.1.1+x}box{.1z-.1}pigment{rgb<.8.2,1>}}//Jellby
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On Mon, 21 Apr 2003 23:38:51 +0200, Jellby <jel### [at] M-yahoocom> wrote:
>
>How I like a drink, alcoholic of course, after the heavy chapters involving
>quantum mechanics...
>
Pi did you say that :-)
Regards
Stephen
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