compare image and give out not similar or in boolean (1/0) form

i am using R2012 matlab

i have to compare two image and get out put in numeric term

or in words like not similar

psnr, immse, ssim is not working any other option to replace this.

actually i am doing activity detection

in which i will compare frame and detect walking activity

Answer 1

[KSSV]

doc corr2

[Mohammedashraf Shaikh]

please give en example if posssible