Stereo based Obstacle Detection with Uncertainty in Rough Terrain

Autonomous robot vehicles that operate in offroad terrain should avoid obstacle hazards. In this paper we present a stereo vision based method that is able to cluster reconstructed terrain points into obstacles by evaluating their relative angles and distances. In our approach, constraints are enforced on these geometric properties by a set of...

Remarks on the palynology-based chronostratigraphical subdivision of Pliocene terrestrial deposits in NW-Europe

The chronostratigraphical subdivision of the Pliocene and Early Pleistocene as applied in terrestrial deposits of Central and NW-Europe largely relies on the pollen analytical investigations. This subdivision is almost entirely based on the interpretation of quantitative changes of the vegetational cover as recorded by the pollen content of...

Point target detection using super-resolution reconstruction

Surveillance applications are primarily concerned with detection of targets. In electro-optical surveillance systems, missiles or other weapons coming towards you are observed as moving points. Typically, such moving targets need to be detected in a very short time. One of the problems is that the targets will have a low signal-to-noise ratio...

Robust Fusion of Irregularly Sampled Data Using Adaptive Normalized Convolution

We present a novel algorithm for image fusion from irregularly sampled data. The method is based on the framework of normalized convolution (NC), in which the local signal is approximated through a projection onto a subspace. The use of polynomial basis functions in this paper makes NC equivalent to a local Taylor series expansion. Unlike the...

Finometer, finger pressure measurements with the possibility to reconstruct brachial pressure

Objective: To evaluate three methods aimed at the reconstruction of brachial pressure from non-invasive finger arterial pressure measurements as implemented in the Finometer™, (FMS, Finapres Measurement Systems, Arnhem, Netherlands), the successor to the Finapres™ (TNO Siomedical Instrumentation, Amsterdam, Netherlands). Methods: Finger arterial...

Experimental example of the pseudo-forces method used in characterisation of a structure-borne sound source

In the analysis of machinery noise the aspect of sound source characterisation is of importance. Unlike for airborne sources, no widely applicable methods are available yet for structure-borne sound sources. In previous work a 'pseudo-forces' methodology was suggested. In this approach fictitious forces on the outer surface replace the internal...

Child restraint system for children in cars - CREST results

Child restraint systems (CRS) for cars are intended to protect children in the case of a car accident. Unfortunately their effectiveness is still too low: in the range 30-50% when it would be expected to be much higher. The low effectiveness of child restraint systems can partly be explained for the youngest passengers by their greater cervical...

Head, neck, and body coupling in reconstructions of helmeted head impacts

A mathematical modeling study is conducted to investigate neck coupling in helmeted head impacts. The main objective of the study is to provide direction for the experimental reconstruction of American football player impacts. Head responses are compared in MADYMO simulations of various impact scenarios without neck coupling, with an improved...

Pedestrian human body validation using detailed real-world accidents

Pedestrian computer model validation currently relies on published data from cadaver tests, which are impact specific. Both the ethical and cost issues make large scale testing of various impact scenarios and body sizes unfeasible. This study focuses on modelling a real-world accident to determine how such a methodology can be used to further...

Barrier Ëunction in Reconstructed Epidermis and Its Resembiance to Native Human Skin

One of the prerequisitesforthe use of human skin equivalents for scientific and screening purposes is that their barrierfunction is similar to that of native skin. Using human epidermis reconstructed en de-epidermized dermis we demonstrated that the formation of the stratum corneum (SC) barrier in vitro proceeds similarly as in vivo as judged...

Barrier function in reconstructed epidermis and its resemblance to native human skin

One of the prerequisites for the use of human skin equivalents for scientific and screening purposes is that their barrier function is similar to that of native skin. Using human epidermis reconstructed on de-epidermized dermis we demonstrated that the formation of the stratum corneum (SC) barrier in vitro proceeds similarly as in vivo as judged...

Study of blast wave interactions with structures using a phase-stepped double reference beam holographic interferometer

An optical study of blast wave propagation and interaction with multiple structures is presented, as well as a method for obtaining quantitative information on the pressure distribution from a number of phase-stepped images. The blast load distribution on buildings is studied by scaling down the buildings and exposing to a plane shockwave in a...

The effects of Pleistocene glaciations on the geohydrological system of Northwest Europe

A large-scale hydrological model study is carried out to investigate the geohydrological responses to glacial climate conditions in Northwest Europe. The vertically integrated groundwater model is based on a supraregional hydrogeological model of the Cenozoic and Mesozoic subsurface in Northwest Europe. Three different layers are distinguished...

Stereo Vision and 3D Reconstruction on a Distributed Memory System

An important research topic in image processing is stereo vision. The objective is to compute a 3-dimensional representation of some scenery from two 2-dimensional digital images. Constructing a 3-dimensional representation involves finding pairs of pixels from the two images which correspond to the same point in space. Several stereo matching...

Vervormde textstrings herkennen met een spatio-temporeel patroon herkennings (SPR) neuraal netwerk

FEL heeft een SPR (Spatio-temporeel Pattern Recognition) neuraal nerwerk geïmplementeerd om vervormde woorden en/of delen van zinnen, in dit geval de namen van schepen, te herkennen in een real-time toepassing. Deze namen kunnen vervormd worden door transmissie en/of type fouten. SPR legt de nadruk op de volgorde van de karakters in een woord....