How to apply image labeling algorithm using neighborhood values?

How do I prodcue an image using neighbourhood 3 x 3, median value ? I cannot see where i am going wrong. Help much appreciated. Peter

Im = imread('Ruben Weg hl.jpg'); % input image
S = size(Im); %size of image X & Y
%NewImage = zeros(size(Im));
%[row,column,depth]=size(Im);
%I need to put something in here
for Tl=1:size(Im,1)
     Th=1:size(Im,2)
     pixel=Im(Tl,Th);
   % p = Im(m) /9
    %Im(:,:,1)
V = Im(m)/9; %pixel values of p neighborhood //9 values
m = median(V); %//Median value of V
V = m(:,:,1);
if Im(p) >= Th && Im(p) > m
 Bi(p) = 1;
 else ifIm(p) >= Th || (Im(p) > Tl && Im(p) > m)
 Bi(p) = 2; 
 else
 Bi(p) = 3;
     end
end 
end
 
subplot (1,1,1)
imshow(Im);
title('output');

Answer 1

[Image Analyst]

Well for one, m is not defined when you use it as an index to your image Im.

V = Im(m)/9; %pixel values of p neighborhood //9 values

Also if you're doing it manually, you'd need 2 for loops, not one. And we'd need to know if the image is color or not.

And why not simply use the built-in function medfilt2()???

Also, do you know that you can type control-a, control-i in the MATLAB editor to fix your indenting. Can you do that and edit your post with the fixed indenting so people can read it.

[Peter Masters]

Hello, thank you. I didn't know that you could type control-a controli. I have done that now. I'm not sure how to use the medfilt function as i am still learning how to use matlab.

Im = imread('Ruben Weg hl.jpg'); % input image
S = size(Im); %size of image X & Y

Med = median(V); %//Median value of V
V = m(:,:,1);
for Tl=1:size(Im,1);
    
    for   Th=1:size(Im,2);
        p=Im(Tl,Th);
        % p = Im(m) /9
        %Im(:,:,1)
        
        % V = Im(m)/9; %pixel values of p neighborhood //9 values
        
        if Im(p) >= Th && Im(p) > m
            Bi(p) = 1;
        else if Im(p) >= Th || (Im(p) > Tl && Im(p) > m)
                Bi(p) = 2;
            else
                Bi(p) = 3;
            end
        end
    end
end

subplot (1,1,1)
imshow(Im);
title('output');