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van Hateren, J.A. (author), Kasse, C. (author), van der Woude, J. (author), Schokker, J. (author), Prins, M.A. (author), van Balen, R.T. (author)Aeolian deposits form rich archives of climatic and environmental changes, which have not been fully explored. In this study, results from end-member modelling of grain size-shape distributions were combined with palynological records to reconstruct sedimentary environments and transport mechanisms, and to distinguish climatically-caused from...article 2022
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Piscaer, P. (author), Henrion, S. (author), Binnerts, B. (author), Van Antwerpen, M. (author), Fermoselle, L. (author), Van Der Hurk, S. (author), Ter Haar, F. (author)This paper presents a systematic cost-effective approach for underwater 3D photogrammetric reconstruction. Underwater 3D reconstruction is a complicated task due to limiting and varying environmental conditions such as: low light conditions, sea snow, water currents and temperature. Quay wall inspection suffers from other possible complications...conference paper 2022
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Boehrer, N. (author), Nieuwenhuizen, R.P.J. (author), Dijk, J. (author)Long-range horizontal path imaging through atmospheric turbulence is hampered by spatiotemporally randomly varying shifting and blurring of scene points in recorded imagery. Although existing software-based mitigation strategies can produce sharp and stable imagery of static scenes, it remains highly challenging to mitigate turbulence in scenes...article 2021
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Numan, N. (author), Haar, F.T. (author), Cesar, P. (author)Head-mounted displays (HMDs) are an essential display device for the observation of virtual reality (VR) environments. However, HMDs obstruct external capturing methods from recording the user’s upper face. This severely impacts social VR applications, such as teleconferencing, which commonly rely on external RGB-D sensors to capture a...conference paper 2021
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van Eeden, T. (author), van der Knaap, F.G.P. (author), Buis, E.J. (author)The discovery of a high-energy cosmic neutrino flux has paved the way for the field of neutrino astronomy. For a large part of the flux, the sources remain unidentified. The KM3NeT detector, which is under construction in the Mediterranean sea, is designed to determine their origin. KM3NeT will instrument a cubic kilometre of seawater with...conference paper 2021
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- Boehrer, N. (author), Nieuwenhuizen, R.P.J. (author), Dijk, J. (author) conference paper 2020
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Alatrach, Y. (author), Mata, C. (author), Shoeibi Omrani, P.S. (author), Saputelli, L. (author), Narayanan, R. (author), Hamdan, M. (author)In this paper, a new approach was identified and tested to detect abnormal events in producing wells when a labeled dataset is unavailable or the number of instances are below 10% and are insufficient for conventional modelling methods. Autoencoders (AE), a type of unsupervised learning, are trained to learn normal behavior by trying to...conference paper 2020
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Buijs, R.D. (author), Schilder, N.J. (author), Wolterink, T.A.W. (author), Gerini, G. (author), Femius Koenderink, A. (author), Verhagen, E. (author)We investigate how partial knowledge of scattering nanostructures enables extraction of spatial information from far-field radiation patterns. A reconstruction technique based on singular value decomposition allows localisation of a point-like light source with nanoscale resolution.conference paper 2020
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Nieuwenhuizen, R.P.J. (author), Schottner, M. (author), Pruim, R.H.R. (author), van Dijk, R. (author), van der Stap, N. (author), Schutte, K. (author)Hyperspectral imaging sensors acquire images in a large number of spectral bands, unlike traditional electro-optical and infrared sensors which sample only one or few bands. Hyperspectral mosaic sensors acquire an image of all spectral bands in one shot. Using a patterned array of spectral filters they measure different wavelength bands at...conference paper 2019
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Boehrer, N. (author), Nieuwenhuizen, R.P.J. (author), Dijk, J. (author)Long range horizontal path imaging through atmospheric turbulence is hampered by spatiotemporally randomly varying shifting and blurring of scene points in recorded imagery. Typical mitigation strategies employ software algorithms that combine optical flow to estimate and reduce tip/tilt aberrations with lucky patch identification and data...conference paper 2019
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Du Bosq, T. (author), Agarwal, S. (author), Dijk, J. (author), Gungor, A. (author), Guven, H.E. (author), Haran, T. (author), Laurenzis, M. (author), Leonard, K. (author), Mahalanobis, A. (author), Paunescu, G. (author), Piper, J. (author), Repasi, E. (author), Sheng, Y. (author)Conventional electro-optical and infrared (EO/IR) systems (i.e., active, passive, multiband and hyperspectral) capture an image by optically focusing the incident light at each of the millions of pixels in a focal plane array. The optics and the focal plane are designed to efficiently capture desired aspects (like spectral content, spatial...conference paper 2018
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Guo, Y. (author), Liu, Y. (author), de Boer, M.H.T. (author), Liu, L. (author), Lew, M.S. (author)General captioning practice involves a single forward prediction, with the aim of predicting the word in the next timestep given the word in the current timestep. In this paper, we present a novel captioning framework, namely Dual Prediction Network (DPN), which is end-to-end trainable and addresses the captioning problem with dual predictions....conference paper 2018
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Nieuwenhuizen, R.P.J. (author), Bouwman, D.D. (author), Schutte, K. (author)High resolution images are critical for a wide variety of military detection, recognition and identification tasks. Super-resolution reconstruction algorithms aim to enhance the image resolution beyond the capability of the imaging system being used. Until recently, undersampling of the optical signal on the image sensor has been the key factor...conference paper 2018
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de Vet, H.C.W. (author), Mullender, M.G. (author), Eekhout, I. (author)Objective: The concept of specific agreement (SA) has been proposed for dichotomous outcomes for two or more raters. We aim to extend this concept for variables with more than two ordinal or nominal categories and more than two raters. Study Design and Setting: We used two data sets: four plastic surgeons classifying photographs after breast...article 2018
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Nieuwenhuizen, R.P.J. (author), Kruithof, M. (author), Schutte, K. (author)High resolution imagery is of crucial importance for the performance on visual recognition tasks. Super-resolution (SR) reconstruction algorithms aim to enhance the image resolution beyond the capability of the image sensor being used. Traditional SR algorithms approach this inverse problem using physical models for the image formation combined...conference paper 2017
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Hoek, W.Z. (author), Lammertsma, E.I. (author), Bohncke, S.J.P. (author), Bos, J.A.A. (author), Bunnik, F.P.M. (author), Kasse, C. (author), Schokker, J. (author), Westerhoff, W.E. (author)This study provides an overview of existing palynological and chronological data of the northern Meuse valley which have been collected over recent decades. The palynological data were used to make a vegetation reconstruction in time and space for the Lateglacial and early Holocene. The vegetation development is strongly influenced by the rapid...article 2017
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- Bekers, J. (author), Van Rossum, W.L. (author), Jacobs, S. (author), Heiligers, M.J.C. (author), Anitori, L. (author), Stolp, E. (author), Cifola, L. (author), Podt, M. (author) conference paper 2016
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de Wit, J.J.M. (author), van Rossum, W.L. (author)Automated extraction of building features is a great aid in synthesizing building maps from radar data. In this paper, a model-based method is described to detect and classify canonical scatters, such as corners and planar walls, inside a building. Once corners and walls have been located, a building map can be synthesized. To detect and...article 2016
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Anitori, L. (author), van Rossum, W.L. (author), Huizing, A.G. (author)In this paper we present some preliminary results on antenna array extrapolation for Direction Of Arrival (DOA) estimation using Sparse Reconstruction (SR). The objective of this study is to establish wether it is possible to achieve with an array of a given physical length the performance (in terms of accuracy, resolution and sidelobe level) of...conference paper 2015
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van Neer, P.L.M.J. (author), Volker, A.F.W. (author)A proper spatial sampling is critical for high quality imaging. If the sampling criterion is not met, artifacts appear in the image, generally referred to as grating lobes. For inspection efficiency the width of the field of view is becoming larger leading to an increase in the number of elements and therefore transducer complexity and cost. The...conference paper 2015