MATLAB: Image Processing

Question

Hi 2 all,

I have one formula for finding moments But i could not know how to proceed further i.e) how to write matlab code for this.Anyone can clarify this? Please send ur suggestion….

imagemoment=summation(imagepixel(i,j)*(x-x')2) / summation(imagepixel(i,j))

summation will be perfformed from 1 to 8

My code:

im=imread('image.jpg'); %binary image of 256x256
u1=xcos(0)+ysin(0);
for i=1:256
for j=1:256 
   for k=1:8
      for l=1:8
         sigma(k,l)=im(k,l)*u1; %doubtful statement
end
end
end
end

%here sigma value must be the summation of 64 values that means in x axis 8 values and y axis 8 values(8×8 block) How to perform this cumulative addition Please post how to perform basic summation Thx in advance……..

im1=
x=1 to 8
x'=summation(imagepixel*x) / summation(image pixel)
i,j varies from 1 to 8

Answer 1

for each 8x8 block, you will want to calculate:

im = rand(8)>.5;             % generate image data
xbar = 4.5;                  % mean x
ybar = xbar;                 % mean y
im2moment = zeros(8);       % allocate memory 
for c = 1:8
    for r = 1:8
        im2moment(r,c) = (r-ybar).^2*(c-xbar).^2*im(r,c);
    end
end
imagemoment = sum(sum(im2moment))/sum(sum(im));