can anyone demo me how to do a tamper localization?

thank you..

Answer 1

[Image Analyst]

What if you simply subtract the image known to be legitimate from the one suspected of being tampered with? (Be sure to cast both to double before subtracting.)

Answer 2

[Youssef Khmou]

hi, That is new field to me, let us try to apply what @Image Analyst described as an example :

X=im2double(imread('circuit.tif'));
T=X;T(200:210,150:170)=T(200:210,150:170)+1.2*randn(size(T(200:210,150:170)));
D=abs(T-X);
subplot(1,3,1), imshow(X), title(' original');
subplot(1,3,2), imshow(T), title(' tampered');
subplot(1,3,3), imshow(D), title(' localization')