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From: Sprinceana on 4 May 2010 16:25
Walter Roberson <roberson(a)hushmail.com> wrote in message <hrptmd$9t9$2(a)canopus.cc.umanitoba.ca>...
> Sprinceana wrote:
> > Formule de luminance c'est I(x) = f(x/r) comment ecrire cette formule en
> > matlab ?
>
> Have you considered using rgb2gray() ? Perhaps in combination with im2double() ?

Sorry for posting in french but I thought that are also people in france on this forum.

No , I must use rgb2gray when converting to a grayscale image not im2double (sorry for posting in both languages).

I'm working on this project from this morning and I have problems of understanding in implementing the formula of luminance. Can someone help me please?

The full m file is attached on mediafire link!
From: ImageAnalyst on 4 May 2010 21:48
Depending on what you mean by luminance (since that's not the correct
term for an image - see http://en.wikipedia.org/wiki/Luminance), you
can find a variety of formulas here:
http://www.easyrgb.com/index.php?X=MATH

Maybe you mean L, L*, V, Y, or I.....


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