Posted by
Stephan Saalfeld on
Apr 07, 2009; 11:27am
URL: http://imagej.273.s1.nabble.com/Fwd-Colour-Quantification-tp3693066p3693067.html
Hi Samatis,
if there is only "brown" in the image. The intensity itself is the
"amount of color". If you have more colors and just the "brown" has
meaning for you, you would have to make "brown" an explicit axis of your
color space which is just a linear transformation. Since you are not
interested in the other components of this color space, you can estimate
the "amount of brown" of an rgb-color c by
amount_of_brown =
c.red / brown.red +
c.green / brown.green +
c.blue / brown.blue
Blame me an idiot if this is wrong ;)
Best regards,
Stephan
On Tue, 2009-04-07 at 13:32 +0300, S. Pagakis wrote:
> Hello
>
> We would like to quantify the "amount" of a colour.
>
> We have two RGB pictures in which an area appears brown and another
> one lighter brown and our experiment will produce a series of
> "brown"
> intensities in between.
>
> We know the ImageJ tools which measure RGB intensity, but expressing
> the two areas as RGB intensities does not produce something
> "meaningful" which can be graphed.
>
> Has anyone used a specific methodology (or has a plugin) which can
> quantify this in another way? Possibly converting the RGB into
> another colour space?
>
> Regards
>
> Samatis Pagakis
>
>
> *********************************
> Stamatis Pagakis Ph.D.
> Biological Imaging Unit
> Biomedical Research Foundation, Academy of Athens
> Soranou Efessiou 4, Athens 115 27 - Greece
> M: +306946644955
> W: +302106597481
> FAX: +302106597545
>
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