why do i got blank figure

why do i got blank figure after the k means applied?

clear ;
clc;
I = imread('(5)PA5.jpg'); 
A = rgb2gray(I)
figure(1),imshow(A);title('ORG Image');
% 
F = fspecial('gaussian');
G = imfilter(A,F);
figure(5),imshow(G);title('G Image');
figure, 
imshow(G);
R = imrect(gca,[50 50 100 100]);
bw= imsegkmeans(G,2);
figure;
imshow(A),title('segmented');

[KSSV]

Attach your input jpeg image.

[MOHAMED GILANI]

attached

Answer 1

[Abhishek Kolla]

Hi,

I have segmented the image into 2 regions using the k-means clustering algorithm. The document for k-means can be referred here K-means clustering based image segmentation - MATLAB imsegkmeans (mathworks.com)

The following changes have been done to the above code

clear ;
clc;
I = imread('image3.jpg'); 
figure(1),imshow(I);title('ORG Image');
F = fspecial('gaussian');
G = imfilter(I,F);
figure(5),imshow(G);title('G Image');
[bw,centre]= imsegkmeans(G,2);
t=labeloverlay(G,bw);
figure(7);
imshow(t),title('segmented');

Results for the final segment image

[MOHAMED GILANI]

how to get it in black&white ?

[Abhishek Kolla]

Hi,

The below code will give the desired result in black and white

clear ;
clc;
I = imread('image3.jpg'); 
figure(1),imshow(I);title('ORG Image');
F = fspecial('gaussian');
G = imfilter(I,F);
figure(5),imshow(G);title('G Image');
[bw,centre]= imsegkmeans(G,2);
t = label2rgb(bw,im2double(centre));
t1=rgb2gray(t);
%t=labeloverlay(G,bw);
figure(7);
imshow(t1),title('segmented');