MATLAB: How to compare 2 binary images pixel by pixel

image analysisimage processingImage Processing Toolboxmatrixmatrix array

hello i need help please.
how to compare 2 binary images pixel by pixel? by using "for" in function "compare"?
it show me error (under text) and i do not know how to solve it:
??? Cell contents reference from a non-cell array object.
Error in ==> compare at 4
        if BW1{a,b}==BW2{a,b}
Error in ==> com at 9
    if compare(BW1,BW2)>100
i have this code:
    if true
  n=1;
  p=2;
  i=1;
  max=100;
  while p <= max
BW1=im2bw(o{n},0.4);    % in "o" are colour pictures
BW2=im2bw(o{p},0.4);
      if compare(BW1,BW2)>100
          c{i}=o{p};
          n=p;
          p=p+1;
          i=i+1;
      else
          p=p+1;
      end
  end
    end
and function for compare:
    if true
     function [same] = compare( BW1, BW2 )
  for a=1:500
      for b=1:500
          if BW1{a,b}==BW2{a,b}
              same=same+1;
          end
      end
  end
  end
    end

Best Answer

Change to
if BW1(a,b)==BW2(a,b)
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