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检索条件"机构=Fraunhofer Institute of Optronics System Technologies and Image Exploitation"

共 595 条记录，以下是121-130 订阅

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Generic Convoying Functionality for Autonomous Vehicles in Unstructured Outdoor Environments 31

Generic Convoying Functionality for Autonomous Vehicles in U...

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31st IEEE Intelligent Vehicles Symposium, IV 2020

作者： Albrecht, Alexander Heide, Nina Felicitas Frese, Christian Zube, Angelika Fraunhofer Iosb Karlsruhe Germany Fraunhofer Institute of Optronics System Technologies and Image Exploitation

Autonomously following a leading vehicle is a major step towards fully autonomous vehicles. The contribution of this work consists in the development, implementation, and validation of two following modes: 1) Exact following: accurate compliance with the reference path. 2) Flexible following: tolerate deviation from the reference path in order to avoid obstacles. The proposed method can easily be integrated into existing frameworks for autonomous vehicles. Therefore our approach is flexible enough to be applied to a large variety of different vehicles. To demonstrate the feasibility of our approach an experimental validation is carried out on two autonomous vehicles with major differences in kinematics, weight, and size: A cross-country wheelchair and an off-road truck. Both exact and flexible following have been successfully demonstrated in unstructured outdoor environments. © 2020 IEEE.

关键词： Autonomous vehicles

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Modelling, Measurement and Correction of Underwater Turbulence Effects on Optical Communications

Modelling, Measurement and Correction of Underwater Turbulen...

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Underwater Communications and Networking (UComms)

作者： Szymon Gładysz Max Segel Jose Montoya Italo Toselli Osvaldo Javier Galicia Gasperin Karin Stein System Technologies and Image Exploitation Fraunhofer Institute of Optronics Germany

We report on progress made in the last few years at fraunhofer IOSB with regards to understanding the effects that underwater turbulence poses for laser-based communications and also with regards to design and implementation of efficient wavefront correction strategies. We have pursued, through parallel efforts, analytical modelling of light propagation through oceanic turbulence, conception and validation of turbulence characterization methods, and construction of “wavefront sensorless” adaptive optics for underwater communications.

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Multi-Modal image Acquisition for AI-Based Bulky Waste Sorting (Incl. Terahertz Synthetic Aperture Radar)

Multi-Modal Image Acquisition for AI-Based Bulky Waste Sorti...

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International Conference on Infrared and Millimeter Waves

作者： D. Čibiraitė-Lukenskienė D. Gundacker M. Bihler M. Heizmann F. Schlüter J. Aderhold L. Roming R. Gruna J. Jonuscheit F. Friederich Fraunhofer Institute for Industrial Mathematics (ITWM) Kaiserslautern Germany KIT Institute of Industrial Information Technology (IIIT) Karlsruhe Germany Fraunhofer Institute for Wood Research (WKI) Braunschweig Germany Fraunhofer Institute of Optronics System Technologies and Image Exploitation (IOSB) Karlsruhe Germany

This work presents the results of the initial acquisition of a multi-modal dataset that will be utilized to train and test a neural network for wood sorting. The aim of the project is to improve wood recycling from bulky waste by using four complementary sensing systems: visual, infrared, terahertz, and thermography. The four systems were combined to capture 57 multi-modal images of bulky waste samples moving on the conveyor belt at a speed of 10 cm/s. Early fusion results on THz show 0.77 accuracy, whereas the best multi-modal data fusion accuracy equals 0.921.

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Measuring game immersion and flow with electroencephalography 15

Measuring game immersion and flow with electroencephalograph...

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15th International Conference on Interfaces and Human Computer Interaction, IHCI 2021 and 14th International Conference on Game and Entertainment technologies, GET 2021 - Held at the 15th Multi-Conference on Computer Science and Information systems, MCCSIS 2021

作者： Kannegieser, Ehm Ratz, Johannes Fraunhofer Institute of Optronics System Technologies and Image Exploitation Fraunhoferstraße. 1 Karlsruhe76131 Germany Karlsruhe Institute of Technology Kaiserstraße 12 Karlsruhe76131 Germany

ISBN: (纸本)9789898704313

Immersion and Flow are important parameters when it comes to an enjoyable experience of video games. To measure these mental states usually self-assessment questionnaires, answered by the subject after the experience, are used. Because of the shortcomings of this method, the ultimate goal is to establish an alternative measuring method through correlations of physiological sensor data. While there are many physiological data sources to be looked at, such as recording the heartrate or skin conductance, measuring brain activity with electroencephalography (EEG) is one of the most promising candidates towards a way of objectively measuring Immersion and Flow. In this paper, an experiment to record EEG data during and questionnaire data after game play is presented. As a proof of concept, the experiment is tested with an initial test study on three subjects and the recorded data is used for analysis and a first correlation attempt. Although the results are not yet generalizable, they indicate that increased overall beta and frontal theta activity may be related to Flow and Immersion. This remains to be proven by conducting further studies in the future to achieve statistical significance. © MCCSIS *** right reserved.

关键词： Electroencephalography

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Towards Self-learning Industrial Process Behaviour from Payload Bytes for Anomaly Detection

Towards Self-learning Industrial Process Behaviour from Payl...

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International Conference on Emerging technologies and Factory Automation (ETFA)

作者： Ankush Meshram Markus Karch Christian Haas Jürgen Beyerer KASTEL Security Research Labs Vision and Fusion Laboratory (IES) Karlsruhe Institute of Technology Information Management and Production Control Fraunhofer Institute of Optronics System Technologies and Image Exploitation (IOSB) Karlsruhe Germany

Network Intrusion Detection system (NIDS) for process-based anomaly detection have been developed as one of the cybersecurity solutions against industrial process targeted attacks such as Stuxnet. In practice, the real-world industrial plants could not complement the advancements in the industrial cybersecurity research as upgrading the infrastructure is an expensive and deterrent process for plant owners. In addition, the infrastructure information might be lost over the intended longer lifetime, hence, configuring a NIDS in the absence of such information is a challenge. Moreover, the existing NIDS solutions analyze the industrial process values/parameters with the knowledge of their semantics, and would fail when the semantics is not known or lost. As a solution to aforementioned problem, we propose an industrial communication paradigm aware Process Payload Profiling Framework (P3F), capable of self-learning process behavior from network traffic without the knowledge of underlying process parameters being exchanged. We also report P3F’s successful detection of an anomaly in the process of a miniaturized PROFINET-based industrial system, caused by a simulated process-targeted cyberattack.

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Practical Tests for Sub-Rayleigh Source Discrimination with Imperfect Demultiplexers

Practical Tests for Sub-Rayleigh Source Discrimination with ...

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Optica Quantum 2.0 Conference and Exhibition, Quantum 2.0

作者： Schlichtholz, Konrad Linowski, Tomasz Walschaers, Mattia Treps, Nicolas Rudnicki, Lukasz Sorelli, Giacomo International Centre for Theory of Quantum Technologies University of Gdansk Gdańsk80-308 Poland Laboratoire Kastler Brossel Sorbonne Université ENS-Université PSL CNRS Collège de France 4 Place Jussieu Paris75252 France Center for Theoretical Physics Polish Academy of Sciences Warszawa02-668 Poland Fraunhofer IOSB Ettlingen Fraunhofer Institute of Optronics System Technologies and Image Exploitation Gutleuthausstr. 1 Ettlingen76275 Germany

We show that quantum-optimal tests for discriminating between one and two light sources via spatial-mode demultiplexing become as good as flipping a coin in the presence of arbitrarily small imperfections, and we deve... 详细信息

ISBN: (纸本)9781957171272

关键词： Crosstalk Demultiplexing Imaging systems Light sources Photon counting Point spread function

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Transmission Matrix Approach to Turbulence Profiling

Transmission Matrix Approach to Turbulence Profiling

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2023 Propagation Through and Characterization of Atmospheric and Oceanic Phenomena, pcAOP 2023 in Optica Imaging Congress - Part of Imaging and Applied Optics Congress 2023

作者： Sorelli, Giacomo Bachmann, David Isoard, Mathieu Shatokhin, Vyacheslav McDonald, Douglas Gladysz, Szymon Treps, Nicolas Buchleitner, Andreas Fraunhofer IOSB Ettlingen Fraunhofer Institute of Optronics System Technologies and Image Exploitation Gutleuthausstr. 1 Ettlingen76275 Germany Physikalisches Institut Albert-Ludwigs-Universität Freiburg Hermann-Herder-Str. 3 FreiburgD-79104 Germany Laboratoire Kastler Brossel Sorbonne Université ENS-Université PSL Collège de France CNRS 4 place Jussieu ParisF-75252 France

We consider transmission-matrix methods for the characterization of the atmosphere. First, we investigate the temporal stability of highly-transmitting modes of instantaneous realizations of atmospheric channels. Then... 详细信息

ISBN: (纸本)9781957171289

关键词： Coherence and statistical optics Gaussian beams Imaging Modes Physical optics Scattering

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Enabling interaction with arbitrary 2D applications in virtual environments 22nd

Enabling interaction with arbitrary 2D applications in virtu...

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22nd International Conference on Human-Computer Interaction, HCII 2020

作者： Hoppe, Adrian H. van de Camp, Florian Stiefelhagen, Rainer Karlsruhe Germany Fraunhofer IOSB Fraunhofer Institute of Optronics System Technologies and Image Exploitation Karlsruhe Germany

ISBN: (纸本)9783030507282

Virtual environments (VE) provide immersive experiences that allow users to perceive and interact with three dimensional (3D) content. Yet, the 3D applications are often tailored for specific tasks and hardware setups such as a virtual or augmented reality (VR/AR) head mounted display (HMD). This limits the range of available content, because not every standard application (e.g. web browser, calender, office) that is available on a 2D desktop PC can be easily accessed using VR or AR. As commonly used by other systems, we capture arbitrary 2D windows from a desktop PC and display them as a 2D surface in the VE. Furthermore, we provide different techniques that aim to allow easy and fast interaction with the 2D applications in VR. For example, the work bench tool allows to copy and paste subsections of a 2D window. The copied sections are fully interactable and can be moved around and scaled to provide easy access to small menus. With the macro tool, users can create shortcuts to frequently used functions that are executed by cursor presses or hotkeys. The provided tools yield new ways of interacting with 2D interfaces. By allowing the user to easily interact with already available 2D applications, the productivity of VEs increases strongly. © Springer Nature Switzerland AG 2020.

关键词： Virtual reality

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A cooperative HCI assembly station with dynamic projections 52

A cooperative HCI assembly station with dynamic projections

引用

52nd International Symposium on Robotics, ISR 2020

作者： Lengenfelder, Christian Frese, Christian Zube, Angelika Voit, Michael Beyerer, Jürgen Fraunhofer IOSB Fraunhofer Institute of Optronics System Technologies and Image Exploitation Karlsruhe Germany Karlsruhe Germany

ISBN: (纸本)9783800754298

This paper presents a cooperative human-computer interaction (HCI) assembly station which is assisting a worker during a manual assembly process. The worker's identity, body pose and height is determined to provide individualized assistance like a robot arm which is holding workpieces in a position which is ergonomic for the worker. A second robot arm is equipped with a camera and projector to precisely project information directly on the workpiece. Safe and intuitive human-robot collaboration is achieved by means of workspace monitoring, force detection, compliant control, and hand-guiding. A distinctive feature of this assembly station is that new assembly steps and documentation can be added interactively directly at the workstation during an assembly by interacting with the projected GUI through hand gestures. This paper will detail an assembly station that was developed in a laboratory environment. © 2020 VDE Verlag GMBH.

关键词： Human computer interaction

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Defect Annotation on Objects Using a Laser Remote Conrol 22nd

Defect Annotation on Objects Using a Laser Remote Conrol

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22nd International Conference on Human-Computer Interaction, HCII 2020

作者： Lengenfelder, Christian Holzbach, Gerrit Voit, Michael Beyerer, Jürgen Fraunhofer Institute of Optronics System Technologies and Image Exploitation Fraunhofer IOSB Karlsruhe Germany Karlsruhe Germany

ISBN: (纸本)9783030507251

In manufacturing, annotating defects for later correction is tedious and still not yet standardized. This task cannot be automated in the foreseeable future since finding and assessing the severity of defects is even for human workers a challenging task. As in the production of car body panels, the manufactured parts are often checked for dents or scratches. Defect slippage is cost-intensive. Therefore, thorough documentation is beneficial. Most manufacturers use direct defect annotation with a grease pencil, coarse masks on a computer or handheld, paper checklists, or simple ‘not OK’ labels on the parts for later inspection and repair. Since no accurate digital documentation of defects is available, defect slippage rates due to workers overlooking annotations are high. Moreover, the required attention shift between the part itself to a representation on a paper or computer screen and vice versa introduces inaccuracies, defect misses and is time consuming. In this contribution, a novel remote control pointing device for defect annotation on objects is proposed. A pilot study was conducted in which the accuracy, user experience and task load were evaluated against a tablet based input method. The results show an average accuracy of 1.5 cm versus 5.1 cm with the novel input method and an overall better and lower task load and user experience. © 2020, Springer Nature Switzerland AG.

关键词： Augmented reality

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