script2

clear
close all
bw = imread('char.png');
imshow(imresize(bw,3,'nearest'));

se = strel('disk',1)

bw2 = imerode(bw,se);
figure
imshow(imresize(bw2,3,'nearest'));

se = 

strel is a disk shaped structuring element with properties:

      Neighborhood: [3×3 logical]
    Dimensionality: 2

sz = size(bw2);
for n=1:sz(1)
    for m=1:sz(2)
        %fprintf('%d',bw2(n,m));
        if bw2(n,m) fprintf('1');
        else fprintf(' ');
        end
    end
    fprintf('\n');
end

                                                
                                                
                                                
                                                
                                                
                                                
                                                
                                                
                    1111111                     
                    1111111                     
                    1111111                     
                    11111111                    
                   111111111                    
                   1111111111                   
                  11111111111                   
                  11111 111111                  
                 11111   11111                  
                 1111    111111                 
                11111     11111                 
                1111      111111                
               11111       11111                
               1111        111111               
              11111         11111               
              1111          111111              
             11111          111111              
             1111            111111             
            111111          1111111             
            111111111111111111111111            
           1111111111111111111111111            
           11111111111111111111111111           
          111111               111111           
          11111                 111111          
         11111                  111111          
         11111                   111111         
        11111                    111111         
        11111                     111111        
       11111                      111111        
       111111                     1111111       
                                                
                                                
                                                
                                                
                                                
                                                
                                                
                                                
                                                
                                                

bw3 = imdilate(bw,se);
figure
imshow(imresize(bw3,3,'nearest'));

subplot(1,3,1);
imshow(imresize(bw,3,'nearest'));
title('original');
subplot(1,3,2);
imshow(imresize(bw2,3,'nearest'));
title('eroded');
subplot(1,3,3);
imshow(imresize(bw3,3,'nearest'));
title('dilated');

imwrite(bw2,'eroded.png');
imwrite(bw3,'dilated.png');

Published with MATLAB® R2017b