MATLAB: How to apply an auto-correlation to a Radon Transformation

Question

I have the following code

I = imread('img.jpg');
I = rgb2gray(I);
theta = 1:180;
[R,xp] = radon(I,theta);

how can I apply auto-correlation on this radon transformation on an image?

I have the following formula for auto-correlation which I want to apply:

where g(s,0) is the radon transformation. How can I implement this in Matlab? or is there an equivalent function that I can use?

Thank you in advance!

Answer 1

Just apply conv() or xcorr(), if you have it, to each of the columns of R. A simple for-loop will do.