Can you please explain this max and temp?

Idilate = Igray;

for i = 1:rows

 for j = 2:cols-1

 temp = max(Igray(i,j-1), Igray(i,j));

 Idilate(i,j) = max(temp, Igray(i,j+1));

 end

Answer 1

[Steven Lord]

It's computing a moving maximum. If you're using release R2016a or later of MATLAB you could use the movmax function instead.