Optimization of focus measure using Genetic Algorithm

This paper presents the use of Genetic Algorithm as a search method for focus measure in Shape From Focus (SFF). Previous methods compute focus value for each pixel locally by surnining all values within a small window. This summation is a good approximation of focus quality, but is not optimal one. The Genetic Algorithm is used as a fine tuning process in which a measure of best focus is used as the fitness function corresponding to motion parameter values which make up each gene. The experimental results show I, hat the proposed method performs better than previous algorithms such as Sum of the Modified Laplacian(SML), Grey Level Variance(GLV) and Tenenbaum Focus Measure. The results are compared using root, mean square error(RMSE) and correlation. The experiments are conducted using objects simulated cone, real cone and TFT-LCD color filter(1) to evaluate performance of the proposed algorithm.