Evolutionary Optimization has attracted many researchers to use it in solving many optimization problems that have no trivial solutions. Some of these techniques include; Genetic Algorithms (GA), Simulated Annealing (SA), Artificial Bee Colony (ABC), Ant Colony Optimization (ACO), etc. This book covers; The comparison of GA, SA, ABC and ACO in TSP, ACO algorithm for Edge Detection, DWT-Based ACO algorithm for Edge Detection, DWT Sub-Band fusion using ACO for Edge Detection, Summary and discussions.