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3. Genetic selection

The program has been written in such a way that the "algorithms" generated can be modified in any way executing always correctly. This is necessary if we want to implement a genetic algorithm. The use of genetic algorithms for artistic purposes is now common. See for example ref. [5]. It allows the exploration of an algorithmic image space with countless members. The subjective decision of the artist (I like or I dislike it) is used to select by continue evolution the interesting forms in the image space. In this implementation the image space is the set of all possible Julia sets of which only 196 have been generated. This is the beginning point for the implementation of a genetic algorithm. In fact,the user at this point is requested to select a number of Julia sets; at the next generation the program will still create some formulas completely randomly, but the remaining formulas will be created by modifying randomly and breeding the selected formulas.Figure 3 shows an example of the breeding of two formulas. This will continue for many generations with results similar to what you see in figure 2. At the end the user can compute with bigger resolution the best results and print them (see figure 4). In this way it is possible to discover new interesting fractal formulas.


Giuseppe Zito
Wed Jul 31 18:19:39 MET DST 1996