This proggram is for thresholding :

[n,m]=size(a);
abin=zeros(n,m);
thresh = 90;
for i=1:n
    for j=1:m
        if (a(i,j)>thresh)
            abin(i,j)=0;
        else
            abin(i,j)=1;
        end
    end
end

Why, in another example, did I find thresh = 0.1 ( 0 < thresh < 1 )? What's the difference? Thanks

Answer 1

[Image Analyst]

I'll fix your formatting this time for you but for next time, read this link

The answer is because the other program wanted 0.1 for a threshold - because they were using a floating point image - and you decided to use 90 because you probably have a uint8 integer image. HOW you go the 90, I don't know, but you can do your whole program more simply with just 2 lines:

thresh = 90;
abin = a <= thresh;

Everything else you have is unnecessary or overly complicated.