【0081】 なお、本変形例を実装するための要素技術は、例えば、以下の文献などに詳しい。 (1) Thi Thi Zin, Hiromitsu Hama, and Pyke Tin, "Object Image Retrieval in Deformable Shapes Using Morphological Operations Based on Dominant Color Regions", DICTA '08 Proceedings of the 2008 Digital Image Computing: Techniques and Applications, pp. 548-555, IEEE Computer Society Washington, DC, USA,2008