These edges may be the edges of one object in front of another or they may be texture edges , shadow borders etc .
Most color and tone variations within an image , whether manually drawn or photographically generated , originate at or are caused by edges .
These edges may be the edges of one object in front of another or edges may be edges   , edges   etc .
Most color and tone variations within an image , whether manually drawn or photographically generated , originate at or are caused by edges .