Multi-View Action Recognition One Camera At a Time

For human action recognition methods, there is often a trade-off between classification accuracy and computa-tional efficiency. Methods that include 3D information from multiple cameras are often computationally expensive and not suitable for real-time application. 2D, frame-based methods are generally more efficient, but suffer from lower recognition accuracies. In this paper, we present a hybrid keypose-based method that operates in a multi-camera en-vironment, but uses only a single camera at a time. We learn, for each keypose, the relative utility of a particular viewpoint compared with switching to a different available camera in the network for future classification. On a bench-mark multi-camera action recognition dataset, our method outperforms approaches that incorporate all available cam-eras. 1