Thread Subject:

All the pixel value in c multiply ( c(i*j)*c(i*j) ) and add to Z.

Please correct the following coding
c=imread('2.bmp');
z=0;
for i=1:row1
    for j=1:col1
   z=z+(c(i,j)*c(i,j));
    end
end
disp('Z');
disp(z);

It is not working Properly. Its shows one constant value, to change any row1 & col1 value.
I want the all the pixel value in c multiply ( c(i*j)*c(i*j) ) and add to Z.

On 7/5/2012 6:22 PM, Ananth wrote:
> Please correct the following coding
> c=imread('2.bmp');
> z=0;
> for i=1:row1
> for j=1:col1
> z=z+(c(i,j)*c(i,j));
> end
> end
> disp('Z');
> disp(z);
>
> It is not working Properly. Its shows one constant value, to change any row1 & col1 value.
> I want the all the pixel value in c multiply ( c(i*j)*c(i*j) ) and add to Z.
>

What is 'row1' and 'col1' above? Where did they come from?

Are you trying something like

t=c.*c;
sum(t(:))

?

--Nasser

sum(c(:).^2)

or

norm(c(:))^2

% Bruno