Cloud Scenes Generation Based on the Improved Random Midpoint Displacement Method

In order to generate more rational and more diversified natural cloud scene, the improved random midpoint displacement method is proposed in this paper. We find that the cloud scenes generated by the traditional random midpoint displacement method are simple and similar through simulation analysis. The limitation of the traditional random midpoint displacement method is caused by unreasonable method by generating random numbers. So the improved random midpoint displacement method uses a new method to generate random numbers. In improved method, the normalized function is used and the difference between the average value and the maximum and minimum value is taken into account. According to a large number of simulations, the law of that parameters of the improved method which influence the cloud scenes is given and the qualification about parameters of the improved method is presented. Simulation results show that the cloudy scenes by improved method are more rational and more diversity.