Jakob Heinzle, Alan A. Stocker
We report a system that classiﬁes and can learn to classify patterns of visual motion on-line. The complete system is described by the dynam- ics of its physical network architectures. The combination of the fol- lowing properties makes the system novel: Firstly, the front-end of the system consists of an aVLSI optical ﬂow chip that collectively computes 2-D global visual motion in real-time . Secondly, the complexity of the classiﬁcation task is signiﬁcantly reduced by mapping the continu- ous motion trajectories to sequences of ’motion events’. And thirdly, all the network structures are simple and with the exception of the optical ﬂow chip based on a Winner-Take-All (WTA) architecture. We demon- strate the application of the proposed generic system for a contactless man-machine interface that allows to write letters by visual motion. Re- garding the low complexity of the system, its robustness and the already existing front-end, a complete aVLSI system-on-chip implementation is realistic, allowing various applications in mobile electronic devices.