Slide 6 (left): Vittorio Ferrari. "Shape Matching and Contour-based Object Recognition" lecture, Image Analysis and Computer Vision Course, Computer Vision Lab, Department of Information Technology and Electrical Engineering, ETH Zurich (2010-2013). http://www.vision.ee.ethz.ch/~cvcourse/lectures/11.pdf [Accessed 30 June 2014]. (right) Christian Borgelt. From: www.borgelt.net/bcview.html [Accessed 14 October 2014]
Slide 6 (right): http://www.borgelt.net/bcview.html [Accessed 30 June 2014].