/sci/ - Science & Math

bump

Come on.

I know that if you substitute Y for a simple average of the 3 channels, the conversion back is easy.

r = R / (R + G + B)
g = G / (R + G + B)
I = (R + G + B) / 3

R = 3 * r * I
G = 3 * g * I
B = 3 * (1 - r - g) * I

So, how do I do the same but when Y is a weighted average?

>>4701676
Are you telling me you can't do basic kiddy algebra?

Really? How fucking old are you?

>>4701676
Step 1) Go to elementary schpp;
Step 2) Learn basic algebra
Step 3) Proffit????

>>4701789
>>4701797

Mind explaining it then, kings of 8th grade algebra.

i assume your are that dude on stack overflow right? just do it with the gaussian elimination... you have to extend the equations appropriately to be able to eleminate certain variable and yes its a fucking pain in the ass

or actually:
http://www.wolframalpha.com/input/?i=solve+r%3D+R%2F%28R%2BG%2BB%29+and+g+%3D+G%2F%28R%2BG%2BB%29+an
d+y+%3D%28R*k1%2BG*k2%2BB*k3+%29+for+R

>>4701868

Yeah, that's really no help at all. I asked how do you remove a small block Chevy engine from a car and you gave me a book all about spanners.

>>4701886

I don't see anything useful inside of that mess.

fucking equations drive me insane
prolly wrong but still writing it down:

G= y*g(r(1-g)-1) / (r (g*k3-g*k1) -((g-1)*k3 -k2*g)(r(1-g)-1))

http://www.wolframalpha.com/input/?i=solve+r%3D+R%2F%28R%2BG%2BB%29+and+g+%3D+G%2F%28R%2BG%2BB%29+an
d+y+%3D%28R*0.299%2BG*0.587%2BB*0.114%29+for+R+and+G+and+B

Seriously, what the fuck is this supposed to mean. That a conversion is impossible?

>>4701676
I think you don't understand what you're doing. Here's the solution anyway.

>>4701931

Uh, negative on that.

>>4701952

No, that's not helpful at all.

3 equations 3 "unknowns" i think my 6th grade math teacher can help you.
good laugh though

>>4701972

It's obviously not that simple, otherwise somebody could have found the answer already.

>>4701676
>can't basic algebra

Are you an engineer or something?

If you delete this shitty thread, I will post the answer in the putnam thread.

NOW DELETE YOUR SHITTY THREAD!

>>4701978

see

>>4701985

You clear

Wow, dumbasses will line up to say how easy this is, and then when they actually attempt it, they haven't got shit.

>>4701989
Post tits or something to make it worth MY while and I will give you the answer. This is a very very very very very very very basic problem, THAT A FUCKING MONKEY COULD DO.

>>4702005
Waiting....

>>4702005

You lie. It's not simple, and you don't have any answer worthwhile.

>>4702001

>>4702012

Contribution to thread: 0

http://www.wolframalpha.com/input/?i=solve+for+R%2CG%2CB+in+r+%3D+R+%2F+%28R+%2B+G+%2B+B%29%2C+g+%3D
+G+%2F+%28R+%2B+G+%2B+B%29%2C+Y+%3D+R+*+0.299+%2B+G+*+0.587+%2B+B+*+0.114

>>4702020

Wow, congratulations. You went to the same site as me and typed in the same shit as me, and you got the same non-answer as me.

>>4701676

Your parents should be fucking raped and executed for the shitty job they did rasing you.

Jesus FUCKING CHRIST! How fucking stupid are you?
1) Solve first quation for R
to obtain
R(r, G, B)
2) Plug R(r, G, B) into to second equation, then solve it for G to obtain

G(r, g, B)
3) Plug G(r, g, B) into the thrid equation, then solve for B to obtain

B(r, g, Y)
4) Plug B(r, g, Y) into G(r, g, B) to obtain
G(r, g, Y)
5) Plug B(r, g, Y) and G(r, g, Y) into R(r, G, B) to obtain
R(r, g, Y)

\thread

>>4701676

Fine, you asshats who claimed to have the answer but don't want to share it with me because I am unworthy, then prove it.

You don't have to post the formula, just prove that you have it.

r = 0.166775244
g = 0.332899023
Y = 0.464053

R = ?
G = ?
B = ?

Have at it you wankers.

Since OP can apparently not into reading:

http://www.wolframalpha.com/input/?i=solve+for+R%2CG%2CB+in+r+%3D+R+%2F+%28R+%2B+G+%2B+B%29%2C+g+%3D
+G+%2F+%28R+%2B+G+%2B+B%29%2C+Y+%3D+R+*+0.299+%2B+G+*+0.587+%2B+B+*+0.114%2C+r%3E0%2C+g%3E0%2C+Y%3E0

>>4702031
\THREAD

>>4701676
OP is a pathetic excuse for a human being.

>>4702038
.256, .511, .768

>>4701676
The homeless community loves when OP comes around. OP just can't get enough of disease ridden cocks! I never knew a person could love the taste of AIDS!

>>4702041

Thanks.

I got what I came for. The rest of you can fuck off.

>>4701676
Stop wasting your time OP. It is obvious that you will never amount to anything. Drop out of school while you are stil young. Older men will love your tight little holes. I hope you like the taste of CUM.

>>4702076
I'm too busy fucking your mom.

>>4702084

I hope you are happy alone.

>>4702090

Stay classy /sci/

>>4701676
ITT: Scientifc proof that OP is a fag