Edges : Part II

Source I: 
http://gurneyjourney.blogspot.com/2008/06/depth-and-edges.html

Source II:
http://stapletonkearns.blogspot.com/2009/04/about-edges.html
http://stapletonkearns.blogspot.com/2009/04/more-about-edges.html
http://stapletonkearns.blogspot.com/2009/04/more-about-edges_21.html
http://stapletonkearns.blogspot.com/2009/04/yet-more-about-edges.html
http://stapletonkearns.blogspot.com/2009/04/different-ways-of-making-edge.html
http://stapletonkearns.blogspot.com/2009/04/endless-information-on-edges-pt-3.html
http://stapletonkearns.blogspot.com/2009/04/edges-deweighting-for-eye-control.html