compud.m

this is matlab file for competitive fuzzy edge detection

function dir= compud(I,i,j,d);
% get direction of each pixel
dir= 0;
if d==1
   dir = imadd(imabsdiff(I(i,j),I(i-1,j-1)), imabsdiff(I(i,j),I(i+1,j+1)));
elseif d==2
       dir = imadd(imabsdiff(I(i,j),I(i-1,j)), imabsdiff(I(i,j),I(i+1,j)));
elseif d==3
       dir = imadd(imabsdiff(I(i,j),I(i-1,j+1)), imabsdiff(I(i,j),I(i+1,j-1)));
else
       dir = imadd(imabsdiff(I(i,j),I(i,j-1)), imabsdiff(I(i,j),I(i,j+1)));
  end;
return;