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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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Illing, B. (author), Westhoven, M. (author), Gaspers, B. (author), Smets, N. (author), Bruggemann, B. (author), Mathew, T. (author)Despite advances regarding autonomous functionality for robots, teleoperation remains a means for performing delicate tasks in safety critical contexts like explosive ordnance disposal (EOD) and ambiguous environments. Immersive stereoscopic displays have been proposed and developed in this regard, but bring about their own specific problems, e...conference paper 2020
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Sioutas, S. (author), Stuijk, S. (author), Basten, T. (author), Corporaal, H. (author), Somers, L. (author)The Halide DSL and compiler have enabled high-performance code generation for image processing pipelines targeting heterogeneous architectures through the separation of algorithmic description and optimization schedule. However, automatic schedule generation is currently only possible for multi-core CPU architectures. As a result, expert...conference paper 2020
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Mohamed, S. (author), De, S. (author), Bimpisidis, K. (author), Nathan, V. (author), Goswami, D. (author), Corporaal, H. (author), Basten, T. (author)Image Processing (IP) applications have become popular with the advent of efficient algorithms and low-cost CMOS cameras with high resolution. However, IP applications are compute-intensive, consume a lot of energy and have long processing times. Image approximation has been proposed by recent works for an energy-efficient design of these...conference paper 2019
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van de Wouw, D.W.J.M. (author), ter Haar, F.B. (author), Dubbelman, G. (author), de With, P.H.N. (author)We propose a real-time change detection system to be used as a vehicle-mounted early-warning system for indicators of improvised explosive devices. Within the context of military route clearance, the system automatically detects suspicious changes in the environment with respect to a previous patrol. For this purpose, historical images of the...article 2019
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Medina Sánchez, R.A. (author), Stuijk, S. (author), Goswami, D. (author), Basten, A.A. (author)Image-based control uses image-processing algorithms to acquire sensing information. The sensing delay associated with the image-processing algorithm is typically platform-dependent and time-varying. Modern embedded platforms allow to characterize the sensing delay at design-time obtaining a delay histogram, and at run-time measuring its precise...conference paper 2019
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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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Mohamed, S. (author), Zhu, D. (author), Goswami, D. (author), Basten, A.A. (author)Image-Based Control (IBC) systems have a long sample period. Sensing in these systems consists of compute-intensive image processing algorithms whose response times are dependent on image workload. IBC systems are typically designed for the worst-case workload that results in a long sample period and hence suboptimal quality-of-control (QoC)....conference paper 2018
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van der Stap, N. (author), van Opbroek, A.G. (author), Huizinga, W. (author), Wilmer, M.M.G. (author), van den Broek, S.P. (author), Pruim, R.H.R. (author), den Hollander, R.J.M. (author), Schutte, K. (author), Dijk, J. (author)Detecting maritime targets with electro-optical sensors is an active area of research. One current trend is to automate target detection through image processing or computer vision. Automation of target detection will decrease the number of people required for lower-level tasks, which frees capacity for higher-level tasks. A second trend is that...conference paper 2018
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Hogervorst, M.A. (author), Bijl, P. (author), Fuller, P. (author), Aartsen, R. (author), Jovanov, L. (author)Image-based Electro-Optical system simulation including an end-To-end performance test is a powerful tool to characterize a camera system before it has been built. In particular, it can be used in the design phase to make an optimal trade-off between performance on the one hand and SWaPC criteria on the other. During the design process, all...conference paper 2018
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Bouma, H. (author), Joosten, B. (author), Kruithof, M.C. (author), de Boer, M.H.T. (author), Ginsca, A. (author), Labbe, B. (author), Vuong, Q.T. (author)Due to the increasing need for effective security measures and the integration of cameras in commercial products, a huge amount of visual data is created today. Law enforcement agencies (LEAs) are inspecting images and videos to find radicalization, propaganda for terrorist organizations and illegal products on darknet markets. This is time...conference paper 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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Dijk, J. (author), Bijl, P. (author), Oppeneer, M. (author), ten Hove, R.J.M. (author), van Iersel, M. (author)The Electro-Optical Signal Transmission and Ranging (EOSTAR) model is an image-based Tactical Decision Aid (TDA) for thermal imaging systems (MWIR/LWIR) developed for a sea environment with an extensive atmosphere model. The Triangle Orientation Discrimination (TOD) Target Acquisition model calculates the sensor and signal processing effects on...conference paper 2017
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de Boer, M. (author), Pingen, G. (author), Knook, D. (author), Schutte, K. (author), Kraaij, W. (author)In content based video retrieval videos are often indexed with semantic labels (concepts) using pre-trained classifiers. These pre-trained classifiers (concept detectors), are not perfect, and thus the labels are noisy. Additionally, the amount of pre-trained classifiers is limited. Often automatic methods cannot represent the query adequately...article 2017
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Toet, A. (author)We have tested whether natural dynamic backgrounds affect perceived facial dominance. Facial evaluation is based on just two fundamental dimensions of facial appearance: valence and dominance. Perceived facial valence has been shown to be biased towards background valence. However, it is currently unknown, if the perception of facial dominance...article 2016
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Keyvani, A. (author), Tamer, M.S. (author), van Es, M.H. (author), Sadeghian Marnani, H. (author)In this paper we present a new AFM based nano-patterning technique that can be used for fast defect repairing of high resolution photomasks and possibly other high-speed nano-patterning applications. The proposed method works based on hammering the sample with tapping mode AFM followed by wet cleaning of the residuals. On the area where a...conference paper 2016
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Hogervorst, M.A. (author), Toet, A. (author)Previously, we presented a method for applying daytime colours to fused nighttime (e.g., intensified and LWIR) imagery (Toet and Hogervorst, Opt.Eng. 51(1), 2012). Our colour mapping not only imparts a natural daylight appearance to multiband nighttime images but also enhances the contrast and visibility of otherwise obscured details. As a...conference paper 2016
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Dijk, J. (author), Schutte, K. (author), Nieuwenhuizen, R.P.J. (author)Visual and infrared imagery is degraded by turbulence caused by atmospheric conditions. Because the degradation gets worse for longer distances, turbulence especially hampers long range observation. At sea this turbulence affects classification and identification of ships and other objects. State of the art software based processing algorithms...conference paper 2016
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Van Den Berg, Freek (author), Hooman, Jozef (author), Hartmanns, Arnd (author), Haverkort, Boudewijn R. (author), Remke, Anne (author)System designers need to have insight in the response times of service systems to see if they meet performance requirements. We present a high-level evaluation technique to obtain the distribution of services completion times. It is based on a high-level domain-specific language that hides the underlying technicalities from the system designer....bookPart 2015
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Schavemaker, J.G.M. (author), Spitters, M.M. (author), Koot, G. (author), de Boer, M.H.T. (author)In this paper we present a simple, novel method to use state-of-the-art image concept detectors and publicly available image search engines to retrieve images for semantically more complex queries from local databases without re-indexing of the database. Our low-key, data- driven method for associative recognition of unknown, or more elaborate,...conference paper 2015