What is the significance of averaging two or multiple images in matlab?

While going through Image processing I came across this code to find the average of two images:

I = imread('rice.png');
I2 = imread('cameraman.tif');
K = imlincomb(.5,I,.5,I2);

Can someone please explain what is the significance of averaging image in this way, whether it is with respect to pixels or RGB contrast profile or what?

Answer 1

[Image Analyst]

It is simply a weighted average of the pixel values, basically

K = uint8(.5 * double(I) + 0.5 * double(I2));

I and I2 have to be the same size, both laterally (rows and columns) and in the number of color channels (1 or 3).

K is usually the same class as I, uint8 in your example case.

Not sure what you mean by "RGB contrast profile".

[shivam sahil]

Thanks! I got what I was asking, the answer you provided cleared my queries. Thanks again :)