MATLAB: Index in position 2 exceeds array bounds

image processing

Is this problem relate to the image file? The image file is attached with this code. Thank you.
close all;
clear all;
clc;
%read image
I=imread('Left 002.jpg');
%Add salt and pepper noise
J = imnoise(I,'salt & pepper',0.01);
[m,n] = size(J);
output = zeros(m,n);
output = uint8(output);
for i = 1:m
    for j = 1:n %intensity of pixel in the noisy image is given as noisy(i,j)
        % here we define max and minimum values x and y coordinates of any
        % pixel can take
        xmin = max(1,i-1); % minimum x coordinate has to be greater than or equal to 1
        xmax = min(m,i+1);
        ymin = max(1,j-1);
        ymax = max(n,j+1);
        % the neigberhood matrix will than be
        temp = J(xmin:xmax, ymin:ymax);
        %now the new intensity of pixel at (i,j) will be median of this
        %matrix
        output(i,j) = median(temp(:));
    end
end
figure(1);
set(gcf, 'Position', get(0,'ScreenSize'));
subplot(131),imshow(I),title('Original Image');
subplot(132),imshow(J),title('Noisy Image');
subplot(134),imshow(output),title('Median Filter');

Best Answer

No, it is because of this line,
ymax = max(n,j+1); %should be min
But I agree with Rik that medfilt2 makes much more sense here.
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