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Re: Calculating colocalization of three colours [message #66750 is a reply to message #66692]

Wed, 10 June 2009 12:42

cgguido
Messages: 195
Registered: August 2005

Senior Member

Grazie for the reply Paolo... ;-)

I guess if you consider a triangle with side lengths C_ab, C_ac, and
C_bc, where these are the correlation coefficients, you can describe
the triangle with only two numbers if you put one apex at the origin
and one side along an axis... hmmm.

Anyway thanks again,
Gianguido

On Jun 10, 10:29 am, Paolo <pgri...@gmail.com> wrote:
> On Jun 4, 12:42 pm, Gianguido Cianci <gianguido.cia...@gmail.com>
> wrote:
>
>
>
>> Hi all,
>
>> say I have two images, r(ed) and g(reen), and I want to know how
>> colocalized these colours are. I do c1=correlate(r,g). if c is close
>> to 1 then there is a lot of colocalization, if c~0 then there is none,
>> if c~-1 then some joker just gave me the same image twice, inverting
>> one of the copies! (usually, one calculates c on a ROI...)
>
>> I am trying to figure out how to do something similar when a b(lue)
>> image is added to the mix. I could do them pairwise, but that means
>> for each set, I would end up with three numbers...
>
>> Any ideas?
>
>> Many thanks,
>> Gianguido
>
> Well, considering that you have 3 possibilities:
>
> - all 3 correlated
> - 2 correlated, one not
> - none are correlated
>
> I don't think anything less than 3 numbers would be enough anyway...
>
> Ciao,
> Paolo
>
> Ciao,
> Paolo

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[Message index]

		Calculating colocalization of three colours By: cgguido on Thu, 04 June 2009 09:42
		Re: Calculating colocalization of three colours By: cgguido on Wed, 10 June 2009 12:50
		Re: Calculating colocalization of three colours By: cgguido on Wed, 10 June 2009 12:42
		Re: Calculating colocalization of three colours By: pgrigis on Wed, 10 June 2009 08:29
		Re: Calculating colocalization of three colours By: cgguido on Tue, 09 June 2009 08:37

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