Cleaning up images in matlab

Question

How would you use Matlab to do the following? I've got fuzzy square images about the same size and then inside the fuzzy square there's smaller fuzzy squares, and I want to clean up the larger squares - not the smaller ones - so that they are no longer blurred. It looks like I'd have to make some type of morphological mask, but I'm not sure how in this case.

Answer 1

If you know where the large fuzzy squares pixels are, (based on pixel values) you can save their location(s). Turn all other pixels to 0 or 1 except at these locations. Use the 'find' function (location - find(image==value) to find the location.

If the values of the large fuzzy square are a range [ value1 value2], then u could use a for loop with if statement.

for a =1:m
  for b= 1:n % image is mxn matrix
     if image(a,b)<=value1 && image(a,b) >=value2
        image(a,b) = 0;
     end
  end
end

Sounds simple enough unless I misunderstood your question