by Hiroki Nishino.
This new fiducial tracking method is based on the combination of topological region adjacency and angle information, whereas existing works by Johnston’s RAG target , Costanza’s D-Touch , and Kaltenbrunner’s reacTIVision  are all based on the uniqueness of the topological region adjacency structure.
Such a combination of the topological region adjacency and angle information enables a wider unique ID range, while maintaining the merit of fast and robust fiducial tracking in topology-based approach. Our method makes it possible to obtain the 6 degrees-of-freedom (6DoF). Such problems of a narrow unique ID range and lack of 6DoF information have been the main deficits in most systems based on topological region adjacency approach, when compared to other fiducial tracking methods.
- Bencina, R., Kaltenbrunner, M. and Jorda, S. (2005). Improved Topological Fiducial Tracking in the reacTIVision System. Proc of IEEE Procams’05
- Costanza, E .and Robinson, J.(2003). A region adjacency tree approach to the detection and design of fiducials, Proc of VVG 2003, pp.63-69
- Johnston,D.(2001).UntetheredVR.Ph.Dthesis, University of Essex
H. Nishino, A 6DoF Fiducial Tracking Method Based on Topological Region Adjacency and Angle Information for Tangible Interaction, The Fourth ACM International conference on Tangible Embedded and Embodied Interaction (ACM TEI 2010) , MA, USA, 2010 Jan. pp.253-256