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Previously, authors proposed a method for taking the appropriate images of written area on the blackboard. In the method, the blackboard is segmentalized into several areas and template matching method is used to acquire the high-resolution images of the written area. It is however, difficult to acquire appropriate rules or search areas for template matching method. This makes decision of template size and matching areas more difficult with high accuracy. This paper proposes a new method to merge the blackboard sub image automatically by using Evolutionary Computation.