label2rgb in MATLAB: code and output

Code:

I = imread('rice.png');

subplot(1,2,1);

imshow(I);

title('original image');

BW = im2bw(I, graythresh(I));

CC = bwconncomp(BW);

L = labelmatrix(CC);

RGB = label2rgb(L);

subplot(1,2,2);

imshow(RGB);

title('RGB image'); 

Output: