Implement Image compression using IGS

Implement Image compression using IGS.

Program:-

clc;
clear all;
close all;
a=imread('C:\Users\a1\Desktop\rainbow.jpg');
y=rgb2gray(a);
[r,c]=size(y);
sum=dec2bin(0,8);
for i=1:r;    
for j=1:c;       
 if y(i,j)>=240;            
t=0;        
else           
t=[sum(5) sum(6) sum(7) sum(8)];           
t=bin2dec(t);        
end        
sum=y(i,j)+t;
sum=dec2bin(sum,8);        
IGS=[sum(1) sum(2) sum(3) sum(4)];       
 p(i,j)=bin2dec(IGS);    
endendsubplot(3,3,1);
imshow(a);
title('original image');
subplot(3,3,2);
imshow(y);
title('grayscale image');
subplot(3,3,3);
colormap(gray)imagesc(p);
title('compressed image');

Output:- 

Image compression using IGS

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