Coherent structures form spontaneously in nonlinear spatiotemporal systems and are found at all spatial scales in natural phenomena from laboratory hydrodynamic flows and chemical reactions to ocean, atmosphere, and planetary climate dynamics. Phenomenologically, they appear as key components that organize the macroscopic behaviors in such systems. Despite a century of effort, they have eluded ...

In this paper we propose a new representation of videos with spatiotemporal blocks. After a given video is decomposed into the spatiotemporal blocks, a dimensionality reduction technique is applied to obtain a compact vector representation of each block gray level values. The block vectors provide a joint representation of texture and motion patterns in videos. Our results on PETS repository vi...

A computational architecture for direct estimation of heading direction from optic flow is proposed. By representing optic flow information as undulatory spatiotemporal patterns, global first-order differential analysis of the optic flow is reconducted to spatiotemporal filtering operations with local kernels characterized with respect to the fixation point (gaze). These operations can be mappe...