rgb_sum for mutiple images

i ve a code for calculating rgb_sum value of a region in an image . now i want to run this for number of images but its giving error. here is the code for one image.

I=imread('C:\Users\ASUS\Desktop\ref_LB\g20.tif');

I=double(I);

rgb_sum=0;

[c r]=imfindcircles(I,[10 30]); c=round(c);

c1=c(1,2);

c2=c(1,1);

for i=-5:5;

    for j=-5:5;

rgb_sum=rgb_sum+I(c1+i,c2+j);

    end
end

its working properly for single image but when im trying it for series of images like here the code for multiple images-

for i=1:20;

    file_name=strcat('C:\Users\ASUS\Desktop\ref_LB\g',num2str(i),'.tif');
    I=imread(file_name);
    I=double(I);
    rgb_sum=0;
    [c(i) r]=imfindcircles(I,[10 30]);
    c=round(c);
    c1=c(1,2);
    c2=c(1,1);
    for k=-5:5;
    for j=-5:5;

rgb_sum(i)=rgb_sum+I(c1+k,c2+j);

    end
    end

end

its giving error; In an assignment A(I) = B, the number of elements in B and I must be the same.

Error in reftest (line 11) [c(i) r]=imfindcircles(I,[10 30]); same for rgb_sum(i).

how to get them all in a single matrix . can anybody help me please..?

Answer 1

[Michael Haderlein]

 [c(i) r]=imfindcircles(I,[10 30]);

Do you need the c of every image in the end? Or will you need it only temporarily in the loop? If you need it only inside the loop, change it to

 [c r]=imfindcircles(I,[10 30]);

Otherwise, you have to index c with

 [c(:,:,i),r]

as it is a matrix.

In any case, in this line

 rgb_sum(i)=rgb_sum+I(c1+k,c2+j);

you need to write

 rgb_sum(i)=rgb_sum(i)+I(c1+k,c2+j);

[babli]

no i don't need the value of c at the end..bt as it will change for every image means in the outer loop of i=1:10 it ve written c(i)..

[babli]

it still giving error: Attempted to access rgb_sum(2); index out of bounds because numel(rgb_sum)=1.