find if a table exists!!

hi i have the above code

for i=300:430
    for j=2500:3500
        if(K3==Foto2(i:i+60,j:j+190))
           do these...............
           imshow(Foto2(i:i+60,j:j+190))
        end 
    end
end

My problem is that i want to convert the code so the if statement checks if the 2 metrices are the same by a catrain rate eg 80%.How can i do that?

[Walter Roberson]

How does this differ from your previous question that Sean already answered?

[Konstantinos Kontos]

with the previus answer i couldnt see in what exactly spot K3==Foto2.Furthermore it didnt work really good for that i want to do.

Answer 1

[Walter Roberson]

if mean2(K3==Foto2(i:i+60,j:j+190)) >= 0.8

[Konstantinos Kontos]

it finds the small matric but only if the K3 taken for Foto2.In other cases that has a lot of same elements does not work.ty anyway!!