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Lehrstuhl für Allgemeine Elektrotechnik und Theoretische Nachrichtentechnik


Prof. Dr.- Ing. Anton Kummert

Publikationen

Jahr:  
Alle :: 1986, ... , 2005, 2006, 2007, ... , 2021
Referenzen

2010

263.
Judith Schmackers; Jörg Velten; Albrecht Glasmachers
Laser phase shift distance meter for vision based driver assistance systems
of the IEEE International Conference on Imaging Systems and Techniques (IST'10) , Seite 220 -224.
Thessaloniki, Greece
Juli 2010

Schlüsselwörter: camera based systems, cameras, car-to-car-communication, computer vision, distance measurement, driver information systems, electronic data interchange, image information exchange, laser measurement system design, laser phase shift distance meter, laser ranging, measurement by laser beam, phase shift laser range finder, phase shifters, tomographic image processing, vision based driver assistance systems

Zusammenfassung: Camera based systems are gaining popularity in automotive driver assistance systems. They are used to detect obstacles, road signs, road markings and other road users. Today, even low cost camera technology enables obtaining a very good image resolution and therefore cameras are able to give a good 2-dimensional image. Due to the projection of an image into the camera's sensor plane, its main disadvantage is the difficulty to estimate the distance of objects projected onto the sensor plane. This difficulty can be overcome if image information is exchanged by several cars via car-to-car-communication. Thinkable solutions range from simply exchanging estimated positions of detected objects up to tomographic image processing. For these methods, knowledge of an exact position of the vehicles is crucial. Conventional positioning methods do not deliver the required accuracy. Therefore a phase shift laser distance measuring device is proposed that is used to measure the vehicles precise position relative to landmarks. Considering the special requirements resulting from this application, the new laser measurement system design is introduced. Measurement results demonstrate its applicability. Special attention is laid on error sources such as crosstalk in this new implementation of a phase shift laser range finder.

262.
Lukasz Hladowski; Krzysztof Galkowski; Zhonglun Cai; Eric Rogers; Chris T. Freeman; Paul L. Lewin
Experimentally verified 2D systems theory based robust iterative learning control
of the American Control Conference (ACC'10) , Seite 3475-3480.
Baltimore, USA
Juni 2010
261.
Anselm Haselhoff; Anton Kummert
On visual crosswalk detection for driver assistance systems
of the IEEE Intelligent Vehicles Symposium (IV'10) , Seite 883 - 888.
San Diego, California, USA
Juni 2010
260.
Sam Schauland; Jörg Velten; Anton Kummert
A new anti-aliasing approach for improved motion-based object detection using linear filters
of the IEEE Intelligent Vehicles Symposium (IV'10) , Seite 915 - 920.
San Diego, California, USA
Juni 2010

Schlüsselwörter: antialiasing, antialiasing approach, blind spot warning systems, camera signal, cameras, computational power, driver assistance systems, driver information systems, improved motion based object detection, linear filter, linear shift invariant, low temporal resolution, object detection

Zusammenfassung: In this paper a new anti-aliasing approach for motion-based object detection using linear shift invariant (LSI) filters is presented. Mainly originating from the field of signal processing, LSI-filter-based motion detection has been topic of research for a long time, though due to low computational power of contemporary computers the developed systems have been unfeasible for application in mass products like driver assistance systems. However, recent progress in hardware in conjunction with decreasing costs makes using linear filters a very interesting alternative of increasing performance of common approaches. One of the most important factors falsifying object detection results obtained using linear shift invariant (LSI) is aliasing. This is mostly caused by the low temporal resolution of the camera signal which leads to the fact that the sampling theorem does not hold for objects moving at high speed in the image plane. In general, aliasing errors cannot be removed after sampling. Under certain conditions, however, their impact on the filter result can be successfully decreased using the approach presented in this paper. The applicability of the new approach is demonstrated using scenes recorded by a camera installed in a blind spot warning system.

259.
Sebastian Sichelschmidt; Anselm Haselhoff; Anton Kummert; Martin Roehder; Bjoern Elias; Karsten Berns
Pedestrian Crossing Detection as a part of an Urban Pedestrian Safety System
of the IEEE Intelligent Vehicles Symposium (IV'10) , Seite 840 - 844.
San Diego, California, USA
Juni 2010
258.
Jörg Velten; Sam Schauland; Anton Kummert; Krzysztof Galkowski
Application specific stability of 2-D Roesser model realizations
of 2010 IEEE International Symposium on Circuits and Systems (ISCAS'10) , Seite 1001 -1004.
Paris, France
Juni 2010

Schlüsselwörter: 1D state space description, 1D system matrix, 2D Roesser model realizations, application specific stability, block Toeplitz matrix, discrete 2D system realizations, discrete systems, kD system stability, multidimensional signal processing, multidimensional system stability, n-D systems, Stability, stability test, state-space methods, Toeplitz matrices

Zusammenfassung: Stability of multidimensional (k-D) systems is still a challenging field of work. Well known and established stability measures may lead to complex mathematical problems, while simple tests are restricted to special cases of n-D systems. A new stability test for certain discrete 2-D system realizations given in a Roesser model description is proposed. This test is suitable for signals bounded with respect to both coordinate directions, like images. The 2-D system is observed in real operation, i.e. considering a sequence of processing, which leads to a 1-D state space description. The resulting 1-D system matrix is some kind of a block Toeplitz matrix that allows definition of the test.

257.
Sam Schauland; Jörg Velten; Anton Kummert
Realization of a new anti-aliasing method for linear filter based object detection in video scenes
of the IEEE International Conference on Acoustics Speech and Signal Processing (ICASSP'10) , Seite 1170 - 1173.
Dallas, Texas, USA
März 2010

Schlüsselwörter: antialiasing method, cheap sensors, costing, demand low production costs, driver assistance systems, image sequences, linear filter, object detection, Shannon sampling theorem, traffic engineering computing, video scenes, video signal processing

Zusammenfassung: This paper presents a new hardware-efficient method of eliminating aliasing artifacts in time direction occurring in filter results of velocity or directional filters applied to image sequences recorded by a camera. Aim is to deliver reliable input data for object detection in a driver assistance system, for example. Applications designed for mass products like these demand low production costs and therefore cheap sensors and hardware. Thus, resolution as well as frame rate of the captured image sequences are often limited and therefore Shannon's sampling theorem is not always satisfied. For the case that aliasing only occurs in the pass band, a method to remove unwanted aliasing components from the filter result without any additional filter hardware is proposed and demonstrated by means of examples.

256.
Anton Kummert
Active Safety Car -Tomographie für mehr Sicherheit im Strassenverkehr
Ingenieur wissenschaften, Ws 2010/2011:202-203
2010
255.
Jörg Velten; Anton Kummert
Active-Safety-Car aus Wuppertal
Bergische Universität Wuppertal, Nr3 Sommersemester 2010:6-11
2010

2009

254.
P. Dabkowski; Krzysztof Galkowski; Eric Rogers; Anton Kummert
Strong practical stability and stabilization of discrete linear repetitive processes
Multidimensional Systems and Signal Processing, 20(4):311 - 331
Dezember 2009
253.
Stephanie Hold; Steffen Görmer; Stefan Müller-Schneiders; Mirko Meuter; Anton Kummert
A novel approach for the online initial calibration of extrinsic parameters for a car-mounted camera
of the 12th International IEEE Conference on Intelligent Transportation Systems (ITSC'09) , Seite 420 - 425.
Oktober 2009

Bemerkung: St. Louis, Missouri, USA

252.
Anselm Haselhoff; Anton Kummert
An evolutionary optimized vehicle tracker in collaboration with a detection system
of the 12th International IEEE Conference on Intelligent Transportation Systems (ITSC'09) , Seite 208 - 213.
St. Louis, Missouri, USA
Oktober 2009

Bemerkung: CD

251.
Steffen Görmer; Dennis Müller; Stephanie Hold; Mirko Meuter; Anton Kummert
Vehicle recognition and TTC estimation at night based on spotlight pairing
of the 12th International IEEE Conference on Intelligent Transportation Systems (ITSC'09) , Seite 196 - 201.
St. Louis, Missouri, USA
Oktober 2009

Bemerkung: CD

250.
Guanglin Ma; M. Dwivedi; C. Sun; Anton Kummert
A real-time rear view camera based obstacle detection
of the 12th International IEEE Conference on Intelligent Transportation Systems (ITSC'09) , Seite 408 - 413.
St. Louis, Missouri, USA
Oktober 2009

Bemerkung: CD

249.
Mirko Meuter; Stefan Müller-Schneiders; Adalbert Mika; Stephanie Hold; Christian Nunn; Anton Kummert
A novel approach to lane detection and tracking
of the 12th International IEEE Conference on Intelligent Transportation Systems (ITSC'09) , Seite 582-587.
St. Louis, Missouri, USA
Oktober 2009

Bemerkung: CD

248.
Christian Nunn; Dennis Müller; Mirko Meuter; Stefan Müller-Schneiders; Anton Kummert
An improved adaboost learning scheme using LDA features for object recognition
of the 12th International IEEE Conference on Intelligent Transportation Systems (ITSC'09) , Seite 486-491.
St. Louis, Missouri, USA
Oktober 2009

Bemerkung: CD

247.
Ligang Wu; James Lam; Wojciech Paszke; Krzysztof Galkowski; Eric Rogers; Anton Kummert
Control and filtering for discrete linear repetitive processes with H? and ? 2?? ? performance
Multidimensional Systems and Signal Processing, 20:235 - 264
September 2009
246.
Lars Höhmann; Andrii Gurski; Anton Kummert
Analysis of multi-hop routing protocols in TinyOS 2.x for a data transmission framework
of the 12th Symposium on Wireless Personal Multimedia Communications (WPMC'09)
Sendai, Japan
September 2009

Bemerkung: Memory Stick

245.
Lars Höhmann; Andrii Gurski; Anton Kummert
Mobility support for wireless sensor networks simulations for road intersection safety applications
of the 52nd IEEE International Midwest Symposium on Circuits and Systems (MWSCAS'09) , Seite 260 - 263.
Cancun, Mexico
August 2009
244.
Sam Schauland; Jörg Velten; Anton Kummert
Realization of a recursive 3-D cone filter for video processing applications
of the 52nd IEEE International Midwest Symposium on Circuits and Systems (MWSCAS'09) , Seite 632 - 635.
Cancun, Mexico
August 2009

Schlüsselwörter: cone-shaped frequency response, field programmable gate arrays, filter design method, hardware implementation, image sequences, multidimensional wave digital filters, recursive 3D cone filter, recursive estimation, shift operators, signal size, video processing applications, video sequence, video signal processingFPGA

Zusammenfassung: In this paper a realization of a recursive 3-D cone filter applicable for low cost hardware like FPGAs, for instance, is presented. Based on the filter design method proposed by Bolle, multidimensional wave digital filters are used to approximate a cone-shaped frequency response. Focus is not set on filter design but on filter implementation and problems arising in that context. In detail, the impact of signal size, chosen processing scheme and shift operators on hardware implementation is illuminated and a suitable solution is proposed. For verification, an example of a filtered video sequence showing moving objects is given.

Bemerkung: CD

243.
Hongwei Li; Sam Schauland; Jörg Velten; Anton Kummert
3D wave digital filter implementation on a virtex2 FPGA board with external SDRAM
of the International Workshop on Multidimensional (nD) Systems (nDS'09)
Thessaloniki, Greece
Juli 2009

Schlüsselwörter: DRAM chips, external SDRAM, field programmable gate arrays, hardware architecture, LCD monitor, n-D signal processing application, synchronous dynamic random access memory, virtex2 FPGA board, wave digital filters3D spatio-temporal wave digital filter

Zusammenfassung: Many n-D signal processing applications require realization in real time. We propose the realization of a 3-D spatio-temporal wave digital filter (WDF) in an FPGA. Optimization of the implemented hardware architecture includes evaluation of two different kinds of overflow handling, namely by saturation and a ldquomodulo 2rdquo type operation. The FPGA board is processing DVI signals that can be provided by usual PC hardware. The processing output is observed in real time on an LCD monitor.

Bemerkung: CD

242.
Sam Schauland; Jörg Velten; Anton Kummert; Krzysztof Galkowski
Insufficiencies of the practical BIBO stability concept with regard to signal processing systems
of the International Workshop on Multidimensional (nD) Systems (nDS'09)
Thessaloniki, Greece
Juli 2009

Schlüsselwörter: discrete systems, Fourier transform, frequency response, impulse response, signal processing, signal processing systems, spatio-temporal signal, Stability, transfer function, transfer functionsBIBO stability

Zusammenfassung: In this paper the practical BIBO stability concept introduced by Agathoklis and Bruton is analyzed with respect to its applicability in the field of signal processing applications. In the field of n-D signal processing signals are often bounded to all but one dimension like be the time-direction of a spatio-temporal signal, for instance. This property makes the use of systems which meet the conditions of practical BIBO stability, mainly known from the field of control theory, appear to be feasible. However, it can be shown hat practical stability in its original form is not sufficient in signal processing if not further conditions are supposed. This is done by comparing the 2D Fourier transform of the actually measured impulse response of exemplary systems to the frequency response expected on basis of the transfer function. Additionally, an application example is given to verify the presented observations.

Bemerkung: CD

241.
Jörg Velten; Sam Schauland; Anton Kummert
A realization framework based on a natural state space description of discrete k-D signal processing systems
of the International Workshop on Multidimensional (nD) Systems (nDS'09)
Thessaloniki, Greece
Juli 2009

Schlüsselwörter: discrete k-D signal processing systems, natural state space description, signal processingdiscrete domain linear k-D systems, system description

Zusammenfassung: The paper presents a realization framework based on a natural state space description of n-D systems with a focus on design and analysis of discrete domain linear k-D systems. While widely used models satisfy control theoretic needs, the presented description addresses design, analysis, and realization of k-D signal processing systems. It provides a system description that offers better compliance with possible hardware realizations than existing models and thus allows evaluation and consideration of many realization specific effects. Non-causal systems that may be of interest in k-D signal processing can be described as well as shift operations / delays with respect to more than one coordinate direction.

Bemerkung: CD

240.
Stephanie Hold; Christian Nunn; Anton Kummert; Stefan Müller-Schneiders
Efficient and robust extrinsic camera calibration procedure for lane departure warning
of the IEEE Intelligent Vehicles Symposium (IV'09) , Seite 382 - 387.
Xi'an, Shaanxi, China
Juni 2009
239.
Anselm Haselhoff; Anton Kummert
A vehicle detection system based on haar and triangle features
of the IEEE Intelligent Vehicles Symposium (IV'09) , Seite 261 - 266.
Xi'an, Shaanxi, China
Juni 2009

Bemerkung: CD

238.
Anselm Haselhoff; Anton Kummert
2D line filters for vision-based lane detection and tracking
of the 6th International Workshop on Multidimensional (nD) Systems (nDS'09)
Thessaloniki, Greece
Juni 2009

Bemerkung: CD

237.
Steffen Görmer; Anton Kummert; Su-Birm Park; Peter Egbert
Vision-based rain sensing with an in-vehicle camera
of the IEEE Intelligent Vehicles Symposium (IV'09) , Seite 279 - 284.
Xi'an, Shaanxi, China
Juni 2009

Bemerkung: CD

236.
Xun Dai; Anton Kummert; Su-Birm Park; Diane Neisius
A warning algorithm for lane departure warning system
of the IEEE Intelligent Vehicles Symposium (IV'09) , Seite 431 - 435.
Xi'an, Shaanxi, China
Juni 2009

Bemerkung: CD

235.
Blazej Cichy; Krzysztof Galkowski; Eric Rogers; Anton Kummert
Iterative learning control for the wave linear repetitive processes
of the 6th International Workshop on Multidimensional (nD) Systems (nDS'09)
Thessaloniki, Greece
Juni 2009

Bemerkung: CD

234.
Blazej Cichy; Krzysztof Galkowski; Eric Rogers; Anton Kummert
Stability of a class of 2D linear systems with smoothing
of the 4th IEEE Conference on Industrial Electronics and Applications (ICIEA'09) , Seite 47 - 52.
Xi'an, China
Mai 2009

Bemerkung: CD

Seite:  
Zurück | 1, ... , 3, 4, 5, 6, 7, ... , 13 | Weiter
Total:
383