angle and edge pixel matrix in which according to angle i need to compute pixel difference based upon threshold value please anyone suggest

for i=1:256; for j=1:256; if angle(i,j)==0; t=1;k=256; for r=1:k; xm=e(i,j-r); xo=e(i,j); xn=e(i,j+r); if abs(xm-xo)<=t && abs(xn-xo)<=t; xm1=e(i,j-r); xn1=e(i,j+r); end end

[Image Analyst]

I have no idea what all that means. People are supposed to upload an image if they want image processing advice, so help us help you by inserting your image and reading this link and this link.