high_boost.m

a=2.8;    % can be changed to get high quality image
f=imread('Fig3.43(a).jpg');
subplot(121);imshow(f,[]);title('original image');
f=double(f);
f1=a*f;
b=ones(3);
f2=(1/9)*spatialfilt(f,b);
x=f1-f2;
subplot(122);imshow(x,[]);title('High boost image');