- The chapter06/sceneedge.cpp file in the example code
- D. Ziou and S. Tabbone (1998), Edge detection techniques: An overview, International Journal of Computer Vision, Vol 24, Issue 3
- Frei-Chen edge detector: http://rastergrid.com/blog/2011/01/frei-chen-edge-detector/
- The Rendering to a texture recipe in Chapter 5, Using Textures