Vein emphasis filter for biometric authentication

In the biometric authentication using vein pattern, the precision of the emphasis of vein has a significant influence on the certification precision. Therefore making a proper filter for emphasizing the vein is important, but the problem associated with the realization of such a filter is very difficult. We decided to make the filter automatically using genetic algorithm which is one of the optimization processing. When processing genetic algorithm, we considered a filter as a gene and calculated the most suitable combination of the filters.