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On the Fly Vehicle modeling and Tracking with 2d-LidAR detector and Infrared Camera 15

On the Fly Vehicle Modeling and Tracking with 2D-LiDAR Detec...

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15th international Joint conference on Computer Vision, imaging and Computer Graphics Theory and Applications (VISIGRAPP) / 15th international conference on Computer Vision Theory and Applications (VISAPP)

作者： Sumi, Kazuhiko Takagi, Kazunari Oshiro, Tatsuya Matsumoto, Takuya Kitajima, Kazuyoshi Hayakawa, Yoshifumi Yamamoto, Masayuki Aoyama Gakuin Univ Fuchinobe Honmachi Sagamihara Kanagawa Japan Sohatsu Syst Lab Kobe Hyogo Japan Mitsubishi Heavy Ind Machinery Syst LTD Kobe Hyogo Japan

ISBN: (纸本)9789897584022

We propose a vehicle detection and tracking system that tracks vehicles from the rear using a 10-band infrared (IR) surveillance camera installed along the expressway. The main reason for using an infrared camera is to suppress the strong light reflections of head and tail lights of the vehicle at rainy night. However, due to lack of a large IR traffic video datasets covering all type of vehicles, we will not be able to take advantages of recent machine learning advances. Therefore, we propose rather straight approach to detect vehicles by a pair of 2d-LidARs, then generate the image model of vehicle to be tracked on the fly. We prototyped the system and evaluated it with a normal traffic video taken on a highway. We achieved a 94% tracking success rate at a distance of 20m to 70m from the camera and mean error of localization is less than 2m at 70m.

关键词： Vehicle detection Vehicle Tracking Localization Infra-Red Lidar

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Permanence testing of 3d-printed objects subjected to fade testing with outdoor sunlight and with high-intensity fluorescent illumination and evaluated with a multispectral camera and image analysis system

Permanence testing of 3D-printed objects subjected to fade t...

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Printing for Fabrication 2018: Materials, Applications, and Processes, NIP 2018

作者： Adams, Richard M. Wilhelm, Henry G. Littler, Jeremy School of Graphic Communications Management Ryerson University TorontoONM5B 2K3 Canada Wilhelm Imaging Research Inc. GrinnellIA50112 United States Digital Fabrication Laboratory Faculty of Communication and Design Ryerson University TorontoONM5B 2K3 Canada

ISBN: (纸本)9780892083367

In the past two decades, 3d printing using polylactic acid (PLA) and other plastics has become widely used for modeling, prototyping, and manufacturing, for both professional and amateur applications. Statistics website predicts that the global 3d printing market will grow from $12 billion in 2018 to $20 billion in 2021. Like 2d-printed signs, prints, and photos, 3d-printed objects, if placed outdoors or in windows, will be exposed to visible light and UV radiation that can cause colorant fading, surface chalking, crazing, and other degradation (including a loss of brightness in the case of fluorescing colors). Little recent work has been published concerning testing of 3d-printed materials for light fading, ozone resistance, and the long-term dark storage stability. [1] To develop a protocol for permanence testing of 3d-printed objects, the authors first developed a 3d-printable test target inspired by the widely-used Macbeth ColorChecker. Fade-resistance testing of samples placed in the 3d color test target was conducted under accelerated fluorescent illumination and in outdoor sunlight. © 2018 Society for imaging Science and Technology.

关键词： 3d printers

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design, Implementation and Characteristic of CMOS Terahertz detectors: an overview 14

Design, Implementation and Characteristic of CMOS Terahertz ...

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14th IEEE international conference on Solid-State and Integrated Circuit Technology (ICSICT)

作者： Liu, Li-yuan Fang, Tong Liu, Jian Wu, Nan-jian Chinese Acad Sci Inst Semicond Beijing 100083 Peoples R China Univ Chinese Acad Sci Beijing Peoples R China

ISBN: (纸本)9781538644416

Terahertz imaging (THz) is promising in non-invasive detection, security check, material analysis et al. Current availabe detectors using microbolometer, Golery cells although proivide satisfactory responsility, they suffer from bulky volumn and are not suitable for large array. Emerging CMOS detectors, however, can offer intensive integration capability and potentials in further integrated with digital signal processors which makes Terahertz digital camera possible. This paper overview current research progress in CMOS THz detector and image sensor. Then we present the theory, design and implementation of CMOS THz detector with commercial CMOS technology, followed by recent experimental results t.

关键词： detectors Antennas Field effect transistors imaging CMOS technology Semiconductor device modeling

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Geometric matching of 3d objects: assessing the range of successful initial configurations

Geometric matching of 3D objects: assessing the range of suc...

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international conference on 3d imaging, modeling, Processing, Visualization and Transmission (3dIMPVT)

作者： H. Hugli C. Schutz Institute for Microtechnology University of Neuchâtel Neuchatel Switzerland

This paper considers the matching of 3d objects by a geometric approach based on the iterative closest point algorithm (ICP), which, starting from an initial configuration of two rigid objects, iteratively finds their best correspondence. The algorithm does not converge always to the best solution. It can be trapped in a local minimum and miss the optimum matching. While the convergence of this algorithm towards the global minimum is known to depend largely on the initial configuration of test and model objects, this paper investigates the quantitative nature of this dependence. Considering the space C of relative configurations of the two objects to be compared, we call range of successful initial configurations, or SIC-range, the subspace of C which configurations bring the algorithm to converge to the global minimum. In this paper, we present a frame for analyzing the SIC-range of 3d objects and present a number of original experimental results assessing the SIC-range of a number of real 3d objects.

关键词： Iterative closest point algorithm Convergence Iterative algorithms Testing Geometry Shape Feature extraction Robustness Rotation measurement

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developing a Virtual TIU Campus Tour: Integrating 3d Visualization of University Facilities in VR 21

Developing a Virtual TIU Campus Tour: Integrating 3D Visuali...

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21st international Multi-conference on Systems, Signals and devices, SSd 2024

作者： Salim, Mohammad Khalilov, Savriddin Tishk International University Faculty of Applied Science IT Department Erbil Iraq

ISBN: (纸本)9798350374131

The development of 'virtual campus tours' in recent years, driven by advances in 3d and virtual reality (VR) technologies, marks a move away from traditional image displays and interactive maps ho to experiences that provide comprehensive university exposure. Even though these visits have been invaluable in enhancing the decision-making processes of potential students by allowing them to gain a comprehensive view of campus resources, they are also an indispensable educational tool in the university's marketing and recruitment process. This study explores the development and impact of a Virtual Tour Guide Application for Tishk international University, utilizing advanced 3d modeling and virtual reality technologies to enhance prospective students' campus exploration experience. By integrating Autodesk 3ds Max and Unreal Engine, this research achieves a realistic and interactive virtual tour, emphasizing the application's potential to improve university engagement and outreach. © 2024 IEEE.

关键词： Engines

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Towards printing of medicine in 2d and 3d 33

Towards printing of medicine in 2D and 3D

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33rd international conference on digital Printing Technologies, NIP 2017

作者： Preis, Maren Pharmaceutical Sciences Laboratory ÅBo Akademi University Artillerigatan 6A Turku20520 Finland

ISBN: (纸本)9780892083312

The pharmaceutical industry showed an increasing interest for printing technologies during the recent years. Besides diagnostic aspects, printing techniques are nowadays used for the fabrication of actual dosage forms or to enable the drug loading of pre-manufactured devices and dosage forms. The present work intends to give an overview of the opportunities given by inkjet printing and extrusion-based printing systems for the manufacturing of medicine. Inkjet printers have been widely used in the pharmaceutical field for depositing small amounts of drug-loaded liquids onto suitable substrates, such as orally disintegrating polymer films [1]. The precise printing process and a layer-by-layer printing approach enables flexibility in dosing. In particular with regard to special patient groups who need individualized doses and drug combinations, respectively, a fast and flexible printing process combining several active components can be considered a promising solution for on-demand patient supply. Extrusion-based printing, for example using semi-solid materials, or more common using polymer melts in a fuseddeposition modeling approach, can moreover be described as a three-dimensional printing technique. The required dosage form in terms of size, shape, surface area, and total weight, can be designed with computer-aided design softwares. The most challenging part of the 3d manufacturing process is, however, identifying the right polymers and excipients for the formulation to match with the requirements for drug release and overall disintegration of the dosage form once it has been administered to a patient [2,3]. The current developments show that more printers will enter the market, including hybrid systems combining inkjet and extrusion-based systems specifically for pharmaceutical purposes. © 2017 Society for imaging Science and Technology.

关键词： Hybrid systems

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UAV-based 3d Photogrammetry for post-Earthquake Studies on Seismic damaged Cities - A Case Study: Castelluccio di Norcia 12

UAV-based 3D Photogrammetry for post-Earthquake Studies on S...

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12th international Multi-conference on Society, Cybernetics and Informatics, IMSCI 2018

作者： Croce, Valeria Martínez-Espejo Zaragoza, Isabel Department of Energy Systems Territory and Construction Engineering Pisa University Pisa Lazzarino Largo56123 Italy A.S.T.R.O. Laboratory Civil and Industrial Engineering Department Pisa University Pisa Lazzarino Largo56123 Italy

ISBN: (纸本)9781941763926

The recent advances in digital technology and mechatronic systems, by radically transforming the survey methodologies, have changed the approaches in analysis, visualization and management of the cultural heritage of buildings and historical sites. One of the most recent applications of digital technology in the field of geomatics is related to the introduction of Unmanned Aerial Vehicles (UAVs), also known as drones, that consist of remotely controlled aircrafts. Thanks to their small size and to the simplicity of use, they can navigate into places characterized by difficult accessibility or located in dangerous positions. Subject of the latest scientific researches is the application of UAV-based photogrammetry to Structure from Motion (SfM) and MultiView Stereo (MVS) techniques, derived from Computer Vision, aiming at the study of post-catastrophe scenarios, in which the traditional ground-based survey technologies cannot be carried out. The integrated digital systems and photo-modeling technologies allow to obtain a study model, in a three-dimensional view, of a certain site and at a defined scale, even in cases where a terrestrial photogrammetry is not allowed and the places are inaccessible. This methodology was applied to the case study of Castelluccio di Norcia, a village of the Municipality of Norcia (Umbria), that was largely destroyed by the earthquake that hit Central Italy in 2016, on October 30th © 2018 international Institute of Informatics and Systemics IIIS. All rights reserved.

关键词： Earthquakes

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Automatic 3-d digitization using a laser rangefinder with a small field of view

Automatic 3-D digitization using a laser rangefinder with a ...

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international conference on 3d imaging, modeling, Processing, Visualization and Transmission (3dIMPVT)

作者： d. Papadopoulos-Orfanos F. Schmitt Dept. Images Ecole Nat. Superieure des Telecommun. Paris France Images Department éėcole Nationale Supėrìeure des Télécommunications Paris France

We address the problem of the automation of surface digitization using a precision 3-d laser rangefinder. Because of their small field of view, such sensors navigate closely to the digitized object and are subject to collisions. Unlike previous techniques that addressed only the exhaustiveness of digitization, this work focuses on collision avoidance. To safely identify empty space, shadow and occlusion phenomena are carefully analyzed, and so is the effect of sampling. Then, the planning problem is solved using a hierarchical approach. At low level, we digitize a single view and address collision avoidance using path planning techniques. At high level, the problem becomes the choice of the next best view. Some implementation details and experimental results are presented.

关键词： Mechanical sensors Sensor phenomena and characterization Collision avoidance Layout Automation Surface emitting lasers Image sensors Navigation Extraterrestrial phenomena Sampling methods

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3rd international conference on Opto-Electronics and Applied Optics, OPTRONIX 2016

3rd International Conference on Opto-Electronics and Applied...

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3rd international conference on Opto-Electronics and Applied Optics, OPTRONIX 2016

ISBN: (纸本)9789811039072

The proceedings contain 85 papers. The special focus in this conference is on Opto-Electronics and Applied Optics. The topics include: Investigation of degradation in photovoltaic modules by infrared and electroluminescence imaging;status and technology of present day solar cells;a brief history of aberrometry applications in ophthalmology and vision science;application of phase-shifted fringe projection method with linear fiber arrays using talbot effect to height measurement of BGA;light amplification in photorefractive ferroelectric liquid crystal blends containing quarter-thiophene photoconductive dopant;photorefractive optical cryptography;role of light in green technology;pareto optimality between far-field parameters of lossless phase-only filters;noble metal doped optical fiber for specialty light source;digital holography for recognition and security of 3d objects;recent advances in fiber loop ringdown sensors;dynamics of dissipative solitons in active silicon waveguides;wavelength response analysis and optimization of photopolymer volume holographic elements for solar energy applications;analytical modeling of vertically oriented standalone si-nanowire metal-oxide-semiconductor capacitors for wavelength selective near-infrared sensing applications;optimal designing of higher efficiency chalcogenide thin film solar cell;highly non-linear simple designed solid core photonic crystal fiber;butterworth filter design using ternary photonic crystal structure under polarized incidence of E.M. wave;numerical simulation of millimeter wave generation in a digital fiber optic link;enhanced of photonic bandgaps in one-dimensional plasma photonic crystal with defect;design of all-optical logical ANd gate based on photonic crystal using T-shaped waveguide and gesture based audio/video player.

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WdF modeling of a korg MS-50 based non-linear diode bridge VCF 20

WDF modeling of a korg MS-50 based non-linear diode bridge V...

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20th international conference on digital Audio Effects, dAFx 2017

作者： Rest, Maximilian Parker, Julian d. Werner, Kurt James E-RM Erfindungsbüro Berlin Germany Native Instruments GmbH Berlin Germany School of Arts English and Languages Queen's University Belfast United Kingdom

The voltage-controlled low-pass filter of the Korg MS-50 synthesizer is built around a non-linear diode bridge as the cutoff frequency control element, which greatly contributes to the sound of this vintage synthesizer. In this paper, we introduce the overall filter circuitry and give an in-depth analysis of this diode bridge. It is further shown how to turn the small signal equivalence circuit of the bridge into the necessary two-resistor configuration to uncover the underlying Sallen-Key structure. In a second step, recent advances in the field of WdFs are used to turn a simplified version of the circuit into a virtual-analog model. This model is then examined both in the small-signal linear domain as well as in the non-linear region with inputs of different amplitudes and frequencies to characterize the behavior of such diode bridges as cutoff frequency control elements.

关键词： Cutoff frequency

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