CODEWITHSUNDEEP
matlabreturn-valuepixel
Simplicity
Simplicity

Reputation: 48946

Result appearing not as expected

I have the function listed at the bottom of this post which is supposed to return a matrix that has the same size of a matrix x with pixels that had a degree of membership y=1 to 1 and the other pixels to 0.

But, when I ran the function I didn't get the expected results as follows (why is that?):

    >> x = [1 4 3; 6 4 3; 6 9 3; 2 4 3; 5 4 0; 5 3 1; 6 4 7];
    >> y = [0 0 1; 1 1 0; 1 1 0; 0 1 1; 0.2 0.8 0.54; 1 1 1; 0 0 0];

>> pixel_val(x,y)

ans =

     0     0     0
     0     0     0
     0     0     0
     0     0     0
     0     0     0
     1     1     1
     0     0     0



        function c = pixel_val(x, y)
        [ii,jj]=find(y==1); 
        x(ii,jj)=1; 
        [ii2,jj2] = find (y~=1); 
        x(ii2,jj2)=0;   
        c = x;
        end

Thanks.

Upvotes: 0

Views: 38

Answers (1)

jerad
jerad

Reputation: 2028

The indices [ii, jj] returned by find are not what you think they are.

You actually dont need two output arguments. Try this instead

ii      = find(y==1); 
x(ii)   = 1; 
ii      = find(y~=1); 
x(ii)   = 0;

Or, better yet, use logical indexing rather than find and do it in one line:

x(y==1) = 1;
x(y~=1) = 0;

Upvotes: 1

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