Summary: Phase Based Modelling of Dynamic Textures
Bernard Ghanem and Narendra Ahuja
Beckman Institute for Advanced Science and Technology
Department of Electrical and Computer Engineering
University of Illinois at Urbana-Champaign
Urbana, IL 61801, USA
This paper presents a model of spatiotemporal varia-
tions in a dynamic texture (DT) sequence. Most recent work
on DT modelling represents images in a DT sequence as
the responses of a linear dynamical system (LDS) to noise.
Despite its merits, this model has limitations because it
attempts to model temporal variations in pixel intensities
which do not take advantage of global motion coherence.
We propose a model that relates texture dynamics to the
variation of the Fourier phase, which captures the relation-
ships among the motions of all pixels (i.e. global motion)
within the texture, as well as the appearance of the texture.
Unlike LDS, our model does not require segmentation or