concept behind genetic algorithm based edge linking

edge linking of a broken edge using genetic algorithm is explained with examples

fitness: pixel intensity
contraints: no pixel repeat && starting in opposite direction
technique:genetic algorithm
chromosomes:12 pixels(6 per side)
decoding method:edgemap connectivity angles
method:
a point is extended on both sides to the nearest edge curve within 6 pixel radius.
reference:
"Particle Swarm Optimisation for Edge Detection in Noisy Images" by Mahdi Setayesh, Victoria University of Wellington