A direct approach for incomplete information systems
Hai Huang, Guoyin Wang, Yu Chuan Wu · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2004
There are already some extensions of rough set theory for incomplete information systems, such as tolerance relation, limited tolerance relation, similarity relation, and etc. But there are no approaches and algorithms for these extensions. A direct approach for processing incomplete information systems is developed in this paper, including discretization, attribute reduction, value reduction, and rule matching. This approach can be used in all kinds of extensions of rough set theory for incomplete information systems. It is both effective in complete and incomplete information systems.