关键词: n阶粒划分, 上近似, 数据识别, 数据隐含

Abstract: Based on an information system, n-order-granule partitions are introduced in this paper, which make the information system achieve different granule’s degrees, so that granular structures are obtained. Furthermore, by arranging elements of the universe with a special way, and after integrating n-order-granule partitions with upper approximation, a data hiding and recognizing method is established, which plays an important role in this area. Moreover, by adjusting the order of the elements of the universe, the data hiding and recognizing are more flexible. Therefore, data hide and recognition can be realized in variable ways.

Key words: n-order-granule partitions, upper approximation, data recognition, data hiding