Flow visualisation has already been a very attractive part of visualisation research for a long time. Usually very large data sets need to be processed, which often consist of multivariate data with a large number of sample locations, often arranged in multiple time steps. Recently, the steadily increasing performance of computers again has become a driving factor for a new boom in flow visuali...

Five experiments examined circular heading perception with optical flows that departed from the canonical form. Noncanonicity was achieved through nonrigidity of the environment (Experiments 1 and 2), oscillations of the point of observation (Experiment 3), and the bending of light (Experiments 4 and 5). In Experiments 1 and 2, perception was impaired more by nonrigidity of the ground plane tha...

The applicability of a three-dimensional, steady, compressible, unstructured-mesh, viscous, Navier-Stokes solver and a two-dimensional, unsteady, slender-body approximation was studied for the investigation of lobed mixer flow fields. The viscous flow solver was evaluated for its ability to calculate the shed streamwise circulation, its subsequent downstream evolution and the thrust. The effect...

The estimation and detection of occlusion boundaries and moving bars are important and challenging problems in image sequence analysis. Here, we model such motion features as linear combinations of steerable basis flow fields. These models constrain the interpretation of image motion, and are used in the same way as translational or affine motion models. We estimate the subspace coefficients of...

Coordination of locomotion in a complex environment requires information about the instantaneous self-motion. Visually oriented animals, including man, may exploit ‘optic flow’ that is generated in the eyes when moving through structured surroundings. Optic flow fields are composed of local velocity vectors. They depend upon a set of motion parameters: (i) direction of gaze, (ii) the rotatory a...

The paper deals with the formulation of a consistent set of governing equations apt to describe the physical phenomenology comprising the hypersonic flow field of an ionized gas mixture and the electromagnetic field. The governing equations of the flow field and those of the electromagnetic field are revisited in sequence and differences or similarities with past treatments are pointed out and ...

The evolution of strain and development of material anisotropy in models of Earth’s mantle flow convey important information about how to interpret the geometric relationship between observation of seismic anisotropy and the actual mantle flow field. By combining feature extraction techniques such as path line integration and tensor accumulation, we compute time-varying strain vector fields tha...