mean2 image processing question

[jimodoherty]

Hi,
I need some help with the mean2 command in the image processing toolbox.
Basically id like to know how Matlab calculates the mean2 of an image that i have been using
All i have been able to find so far is that it "calculates the mean of an n-Dimensional array"

Can anyone describe briefly how the mean of an image is calculated??

Thanks
Jim O Doherty

 

[IRstuff]

Is it supposed to be something different than the sum of all the values of the array divided by the number of elements in the array

TTFN

 

[jimodoherty]

I am not sure. I know how to get the mean of an array, but my worry was that since an image is made up of 3 arrays (red green and blue) there is a certain value of red green and blue for each pixel present. I was wondering if Matlab takes this into account and how it deals with it

 

[IRstuff]

Why would you want to take the mean of a color image?

Shouldn't you convert to grayscale first?

TTFN