An expression approach of special directional relation

Spatial relations among image objects play a vital role in the domains of computer vision, but the expression method of special directional relation has not been the subject of as much investigation. In this paper we propose a fuzzy model of special directional relation to describe `surround´ and `between´. The new expression method to judge special directional relation based on F-histogram (Force histogram) is described in detail. The experimental results show that the model can get close to the verdict like human cognition for special directional relation.