1. Y. Gong, H. Zhang, H. Chuant, and M. Skauuchi, An image database system with contents capturing and fast image indexing abilities, in: Proceedings of IEEE International Conferences on Multimedia Computing and Systems, Boston, Massachusetts, USA, May, 1994, pp. 121–130.
2. Design and evaluation of algorithms for image retrieval by spatial similarity;Gudivada;ACM Transactions on Information Systems (TOIS),1995
3. Y. Gu, B. Panda, K.A. Haque, Design and analysis of data structures for querying image databases, in: Proceedings of the ACM Symposium on Applied Computing, Las Vegas, Nevada, USA, 2001, pp. 236–241.
4. Image retrieval: current techniques, promising directions, and open issues;Rui;Journal of Visual Communication and Image Representation,1999
5. Similarity of color images;Stricker;SPIE: Storage Retrieval Image and Video Database III,1995