To be truly accepted in the village you need to be able to trace back your local roots for several generations. Everyone else is referred to as a ‘comer-in’. The recent redevelopment of an abandoned mill has created an influx of comers-in, with some good and some bad effects. The moors and valley also have their share of botanical comers-in: rhodedendrons have occupied some moorland areas, and ...

A materialized view is a certain synopsis structure precomputed from one or more data sets (called base tables) in order to facilitate various queries on the data. When the underlying base tables change, the materialized view also needs to be updated accordingly to reflect those changes. We consider the problem of batch-incrementally maintaining a materialized view under a response-time constra...

Themainproblem in the real-timerenderingofvegetation is themassiveamountofprimitives tobe rendered. These primitives are needed to fully describe the geometry of the plants. However, some of them are not visible depending on the location of the viewer. This work focuses on this fact to interactively reduce the amount of geometry needed to represent the foliage through a view-dependent multireso...

An increasing number of computer vision applications, including medical systems, are using range imaging which require real-time and accurate 3D data acquisition. Time-of-Flight cameras allow us to acquire 3D data in real-time and at high frame-rate, however, the provided depth accuracy is in order of centimeters. This thesis describes a novel method for acquiring depth images using multi-view ...

Due to the success of DS-SS CDMA and OFDM in the early nineties, several approaches were developed to combine both schemes. Many papers which deal with multi-carrier techniques concentrate on signal processing in the frequency domain. This paper reviews research on time domain signal processing for multi-carrier spread-spectrum systems. Basic characteristics such as spectral shape, correlation ...

Mass Conservative Motion Reconstruction is a new method for estimating motion in time dependent volume data. A time dependent vector field representing the movement of the data is computed from a sequence of scalar volume data sets. The principle of mass conservation in a continuum is used during the reconstruction. Standard flow visualization techniques are used for the visualization of the de...

The conventional Fourier-transform-based spin-echo sequence with a view angle tilting gradient during data acquisition can correct the in-plane distortion induced by a chemical shift or B0 field inhomogeneity. However, when extended for 3D applications, alternate k-space sampling can be beneficial for reducing the lengthy scan time. As spiral trajectories have high k-space acquisition efficienc...

In this paper we propose a novel human action recognition method, robust to viewpoint variation, which combines skeletonand depth-based action recognition approaches. For this matter, we first build several base classifiers, to independently predict the action performed by a subject. Then, two efficient combination strategies, that take into account skeleton accuracy and human body orientation,...

This paper describes a novel method of real-time virtual view generation for augmented virtuality system. The aim is to rectify the displacement between virtual eye position and video cameras which are attached on the head mounted display. It consists of three steps: Firstly, stereo calibration was used to generate cameras' internal and external parameters, and then image planes were rectified ...

This thesis addresses the topic of real-time multi-view 3D reconstruction in interventional environments. Due to the special working conditions in interventional rooms this is a very challenging topic. However, the ability to recover the 3D structure of a dynamic scene in real-time is essential for many novel and innovative interventional applications. In this thesis we take a step towards this...