How to calculate the inter-band average image.

i am new to matlab, help me?

How to calculate the inter-band average image.

[Image Analyst]

First define what it is? What is a band? Do you mean like a spectral band, like a color channel like R, G, or B? Or something different? And how do you define "interband"? How many bands do you want it averaged over, and is there any weighting applied to the different bands?

[S .p.aramesh S]

Let B = b (i, j ) ; i = 1, 2, . . . , Mm ; j = 1, 2, . . . , Nn I need sir,but i don't know how to do this

A set of image blocks of size m × n, containing the RGB color pixel information. The original image block b(i, j ) is firstly converted into the inter-band average image ¯bk,l (i, j )

[Image Analyst]

Explain the "B = b(i, j )" comment. Which little b is the big B equal to? There are 4 little b's: bBar, bRed, bGreen, and bBlue. Which one are you calling capital B? And why?

Answer 1

[Thorsten]

If you have your RGB image in a MxNx3 matrix, you can use

 I = im2double(imread('peppers.png')); % sample image
    % make sure I is double
 Ibar = mean(I, 3);

[S .p.aramesh S]

Thank u sir,

Answer 2

[Paul Sponagle]

Better late than never:

I was trying to find band mean values, which I initially thought you wanted. Regardless this is how I did it.

For a hypercube, Z with dimensions rowXcolXband, this would be:

    band_means = sum(sum(Z,2),1)/(row*col)