Estimating Image Motion in Layers: The \Skin and Bones" Model Xuan Ju Doctor of Philosophy Graduate Department of Computer Science University of Toronto 1998 This thesis addresses the problem of recovering a locally layered representation of image motion. We develop the \Skin and Bones" model for estimating optical ow that strikes a balance between the exibility of regularization techniques and...

Synchronous data ow (SDF) graphs are a widely used formalism for modelling, analysing and realising streaming applications, both on a single processor and a multiprocessing context. E cient schedules are necessary to obtain maximal throughput with the optimum energy consumption in such a way that the number of resources used to run these applications is kept as low a possible. This paper presen...

Intermediate-period Rayleigh and Love waves propagating across Tibet require marked radial anisotropy within the mid-lower crust, consistent with a thinning of it. The anisotropy is largest in the western part of the plateau where the moment tensors of earthquakes indicate active crustal thinning. A preferred orientation of mica crystals resulting from the crustal thinning can account for the o...

Moving contact lines are implemented in a volume-ofuid scheme with piecewise linear interface construction. Interfacial tension is treated as a continuous body force, computed from numerical derivatives of a smoothed volume-ofuid function. Two methods for implementing the contact angle condition are investigated. The rst extrapolates the volume-ofuid function beyond the ow domain, on the basis ...

We show that the set of all ow elds in a se quence of frames imaging a rigid scene resides in a low dimensional linear subspace Based on this observa tion we develop a method for simultaneous estimation of optical ow across multiple frames which uses these subspace constraints The multi frame subspace con straints are strong constraints and replace commonly used heuristic constraints such as sp...

We derive suucient conditions on image structure that permits determination of 3-D motion parameters and depth from motion relative a rigid surface in front of the camera. We assume that only the rst order spatio-temporal derivative or of the image is given and that the image intensity is continuously diierentiable everywhere or that image contours are continuously diierentiable. This means tha...

Young basalt terrains offer an exceptional opportunity to study landscape and hydrologic evolution through time, since the age of the landscape itself can be determined by dating lava fl ows. These constructional terrains are also highly permeable, allowing one to examine timescales and process of geomorphic evolution as they relate to the partitioning of hydrologic fl owpaths between surface a...

Financial crises in countries are often accompanied by an out‡ow of foreign portfolio investment and an in‡ow of foreign direct investment (FDI). We provide an agency-theoretic framework that explains this phenomenon. During crises, agency problems a¤ecting domestic …rms are exacerbated, and, in turn, external …nancing constrained. Direct ownership can circumvent these problems, but during cris...

In this article we discuss the application of a Lagrange multiplier based ®ctitious domain method to the numerical simulation of incompressible viscous ̄ow modeled by the Navier±Stokes equations around moving rigid bodies; the rigid body motion is due to hydrodynamical forces and gravity. The solution method combines ®nite element approximations, time discretization by operators splitting and c...