Visual tracking is very important for many applications in computer vision, such as traac control, intelligent surveillance, industry automation, human computer interaction, etc. In this paper, we propose a hierarchical framework for estimating displacement vectors at feature points with the coarse-tone block matching method. Feature points are chosen to be the image locations having large curv...

Random walks are studied on disordered cellular networks in 2-and 3dimensional spaces with arbitrary curvature. The coefficients of the evolution equation are calculated in term of the structural properties of the cellular system. The effects of disorder and space-curvature on the diffusion phenomena are investigated. In disordered systems the mean square displacement displays an enhancement at...

The directional change of a fluid particle can be measured by the angle between two subsequent particle displacement increments. At small values of the time-increment the so-defined angle is proportional to the curvature of the trajectory. At large values this coarse-grained curvature should be affected by the presence of solid no-slip walls around the flow domain. We compare homogeneous and co...

Closed form expressions are developed for the thermoelastic curvature of the initially plane end faces of a traction free cylinder subjected to arbitrary axisymmetric heat flux, the curved surfaces being assumed insulated. The solution is developed from a potential function representation of displacement and temperature for an elastic layer. The reciprocal theorem is invoked to show that the tr...

This paper presents a new digitizing technique which integrates computer vision methods, such as the ’ photometric stereo approach, with the laser displacement sensors (LDS). The curvature at each point of the surface can be measured cost-effectively by the photometric stereo approach. Once the information of curvature of the surface is provided, the measuring speed of LDS can be improved by di...

Automatic labelling and identification of cerebral structure, such as cortical sulci, are useful in neurology, surgery planning, etc... In this paper, a method to detect the valley of the cortical sulci is presented. The aim of the method is to achieve the sulci medial surface. The method applied on MRI data, is based on geometrical features (curvature) which doesn’ t require the accurate segme...

in this paper, the time-like hyperruled surfaces in the minkowski 4-space and their algebraicinvariants are worked. also some characteristic results are found about these algebraic invariants.

Vibration-based methods of non-destructive damage detection utilizing curvature or strain energy mode shapes have been applied in a variety of applications. Attractive features of these methods include high sensitivity to damage and instant determination of the damage location. However, the quality of damage detection achieved in practice depends upon determining a proper sampling interval for ...

Abstract: Line smoothing in map generalisation is commonly seen as a comparatively simple operation. In this paper, however, the snakes model will be examined as a basic technique with respect to combined operations of displacement and smoothing. For line smoothing, two different snake models and their parametrisation with curvature controlled and constant parameters are examined. Further the s...