Abstract
In this paper, we propose the detection method of plural polygonal figures, regardless of the figure's configuration. In this proposed method, we use the immune algorithm which can search local solutions effectively, as optimization method, and we use antibodies coding some kinds of figure's configuration respectively. In our experiment using objective image with several kinds of polygons which have less than 6 vertices, we have proven that our proposed method can search plural polygons which have different size and number of vertices.