A little better than the Pang's method in tone

Worse than the Ostromoukhov's mehtod and the error diffusion in tone match



The MSSIM comparison by 2003 Zhou Wang(matlab codes from their page)

http://www.ece.uwaterloo.ca/~z70wang/research/ssim/
The PSNR comparison(matlab codes from matlab central)

http://www.mathworks.com/matlabcentral/fileexchange/135
Use the Gaussian filter first for both images(11 by 11 window)