How to apply Power Law Transformation in MATLAB ?

Read remote.jpg image which is an aerial image which has washed out appearance. Compression of gray level is required. Apply power law transformation with γ =3,4,5. Display and comment on the results.

CODE:

clc; clear all;

c=1;

Gamma=input('Enter the Gamma values = ');       % Must be vector, Ex:[3 4 5]

x=imread('remote.jpg');

x1=double(x);      

y=c*(x1.^Gamma(1));                             % s=c*(r^ γ)

y1=c*(x1.^Gamma(2));

y2=c*(x1.^Gamma(3));

subplot(141),imshow(x), title('Aerial image')

subplot(142),imshow((y),[]), title('Corrected image(Gamma=3)')

subplot(143),imshow((y1),[]), title('Corrected image(Gamma=4)')

subplot(144),imshow((y2),[]), title('Corrected image(Gamma=5)')

OUTPUT RESULT: