MATLAB TUTORIAL EIGHT

   To perform Morphological Image Processing in Matlab.

clear all;

close all;

clc;

[namefile,pathname]=uigetfile({'*.bmp;*.tif;*.tiff;*.jpg;*.jpeg;*.gif','IMAGE Files (*.bmp,*.tif,*.tiff,*.jpg,*.jpeg,*.gif)'},'Chose GrayScale Image');

a = imread(strcat(pathname,namefile));

s = size(a);

b = strel('square',9);

erode = imerode(a,b);

dilate = imdilate(a,b);

opening = imdilate(erode,b);

closing = imerode(dilate,b);

figure;

imshow(a); title('Original Image');

figure;

imshow(erode); title('Erosion');

figure;

imshow(dilate); title('Dilation');

figure;

imshow(opening); title('Opening');

figure;

imshow(closing); title('Closing');

Perform Morphological Image Processing through Programming Logic.

Dilation and Erosion

clc;

close all;

clear all;

a=imread('arjun.jpg');

p=size(a);

s=strel('square',5);

w=[1 1 1;1 1 1;1 1 1];

for x=2:1:p(1)-1

    for y=2:1:p(2)-1

        a1=[w(1)*a(x-1,y-1) w(2)*a(x-1,y) w(3)*a(x-1,y+1) w(4)*a(x,y-1) w(5)*a(x,y) w(6)*a(x,y+1) w(7)*a(x+1,y-1) w(8)*a(x+1,y) w(9)*a(x+1,y+1)];

        A1(x,y)=max(a1);  % Dilation

        A2(x,y)=min(a1);  % Erosion

    end

end

subplot(2,3,1)

imshow(a);

title('Original Image');

subplot(2,3,4);

imshow(A1);

title('Dilation using program');

subplot(2,3,5);

imshow(A2);

title('Erosion using program');

Perform Morphological Image Processing through Programming Logic.

Opening

clc;

close all;

clear all;

a=imread('arjun.jpg');

p=size(a);

w=[1 1 1;1 1 1;1 1 1];

for x=2:1:p(1)-1

    for y=2:1:p(2)-1

        a1=[w(1)*a(x-1,y-1) w(2)*a(x-1,y) w(3)*a(x-1,y+1) w(4)*a(x,y-1) w(5)*a(x,y) w(6)*a(x,y+1) w(7)*a(x+1,y-1) w(8)*a(x+1,y) w(9)*a(x+1,y+1)];

        A1(x,y)=min(a1);

    end

end

q=size(A1);

for i=2:1:q(1)-1

    for j=2:1:q(2)-1

        a11=[w(1)*A1(i-1,j-1) w(2)*A1(i-1,j) w(3)*A1(i-1,j+1)...

            w(4)*A1(i,j-1) w(5)*A1(i,j) w(6)*A1(i,j+1)...

            w(7)*A1(i+1,j-1) w(8)*A1(i+1,j) w(9)*A1(i+1,j+1)];

        A2(i,j)=max(a11);

    end

end

subplot(1,2,1)

imshow(a)

title('Original image')

subplot(1,2,2)

imshow(A2)

title('opening')

Perform Morphological Image Processing through Programming Logic.

Closing

clc;

close all;

clear all;

a=imread('arjun.jpg');

p=size(a);

w=[1 1 1;1 1 1;1 1 1];

for x=2:1:p(1)-1

    for y=2:1:p(2)-1

        a1=[w(1)*a(x-1,y-1) w(2)*a(x-1,y) w(3)*a(x-1,y+1) w(4)*a(x,y-1) w(5)*a(x,y) w(6)*a(x,y+1) w(7)*a(x+1,y-1) w(8)*a(x+1,y) w(9)*a(x+1,y+1)];

        A1(x,y)=max(a1);

    end

end

q=size(A1);

for i=2:1:q(1)-1

    for j=2:1:q(2)-1

        a11=[w(1)*A1(i-1,j-1) w(2)*A1(i-1,j) w(3)*A1(i-1,j+1) w(4)*A1(i,j-1) w(5)*A1(i,j) w(6)*A1(i,j+1) w(7)*A1(i+1,j-1) w(8)*A1(i+1,j) w(9)*A1(i+1,j+1)];

        A2(i,j)=min(a11);

    end

end

subplot(1,2,1); 
imshow(a); 
title('Original image')