FcBD: an Agent-Based Architecture to Support Sketch Recognition Interfaces

Sketch-based interfaces are increasingly used for interaction with desktops or mobile devices, favouring natural interaction through the expression of commands and concepts with graphical symbols. However, developing this kind of human-oriented interfaces is still challenging, due to: the limited number and type of graphical symbols definable and recognizable in a device-independent way, the computational cost incurred for recognizing complex symbols, and the different users’ styles in tracing symbols. FcBD’s agentbased architecture supports the definition and real-time recognition of sets of 2D graphical symbols, independently of the input style. FcBD’s layered organisation favours abstraction from the concretely employed device, and proposes an approach to symbol recognition based on associating with each recognition agent disjoint sets of primary and secondary features.