compud.asv

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 = abs(imsubtract(I(i,j),I(i-1,j-1)))+abs(imsubtract(I(i,j),I(i+1,j+1)));
elseif d==2
   dir = abs(imsubtract(I(i,j)-I(i-1,j)))+abs(imsubtract(I(i,j)-I(i+1,j));
elseif d==3
   dir = abs(I(i,j)-I(i-1,j+1))+abs(I(i,j)-I(i+1,j-1));
else
   dir = abs(I(i,j)-I(i,j-1))+abs(I(i,j)-I(i,j+1));
end;
return;