2015
Philipp Schaber, Stephan Kopf, Sina Wetzel, Tyler Ballast,
Christoph Wesch, Wolfgang Effelsberg
CamMark: Analyzing, Modeling, and Simulating Artifacts in
Camcorder Copies
ACM Transactions on Multimedia Computing, Communications, and
Applications (
TOMM), Vol. 11 (2), February 2015
[BibTeX] [link]
Philip Mildner, Tonio Triebel, Stephan Kopf, Wolfgang Effelsberg
Scaling online games with
NetConnectors: A Peer-to-Peer overlay for fast-paced massively
multiplayer online games
ACM Computers in Entertainment
(CIE), (accepted for publication)
Daniel Schön, Melanie Klinger, Stephan Kopf, Wolfgang Effelsberg
A Model for Customized In-Class Learning Scenarios
International Conference on Computer Supported Education (
CSEDU),
2015
[PDF] [BibTeX] [link]
Stefan Wilk, Stephan Kopf, Wolfgang Effelsberg
Video Composition by the Crowd: A System to Compose
User-Generated Videos in Near Real-Time
ACM Multimedia Systems Conference (
MMSYS), pp. 13 -
24, 2015
[BibTeX] [link]
Stephan Kopf, Daniel Schön, Benjamin Guthier, Roman Rietsche,
Wolfgang Effelsberg
A Real-time Feedback System for Presentation Skills
Proc. of World Conference on Educational Media and Technology,
pp. 1705-1712, 2015
[PDF]
[BibTeX] [link]
Daniel Schön, Licheng Yang, Melanie Klinger, Stephan Kopf,
Wolfgang Effelsberg
On the Effects of Different Parameters in Classroom
Interactivity Systems on Students
Proc. of World Conference on Educational Media and Technology,
pp. 721-729, 2015
[PDF]
[BibTeX] [link]
2014
Philipp Schaber, Stephan Kopf, Christoph Wesch, Wolfgang
Effelsberg
CamMark: A Camcorder Copy Simulation as Watermarking Benchmark
for Digital Video
Proc. of the 5th ACM Multimedia Systems Conference (MMSYS),
pp. 91-102 , 2014 (
best paper award)
[BibTeX] [link]
Benjamin Guthier, Stephan Kopf, Matthias Wichtlhuber, Wolfgang
Effelsberg
Parallel Implementation of a Real-Time High Dynamic Range Video
System.
Integrated Computer-Aided Engineering Journal (
ICAE),
Vol. 21 (2), pp. 189-202, April 2014
[PDF] [BibTeX] [link]
Max Lehn, Tonio Triebel, Robert Rehner, Benjamin Guthier, Stephan
Kopf, Alejandro Buchmann, Wolfgang Effelsberg
On synthetic workloads for multiplayer online games: a
methodology for generating representative shooter game workloads
Multimedia Systems Journal (MMSJ), Vol. 20 (5), pp 609-620,
October 2014
[PDF]
[BibTeX] [link]
Stephan Kopf, Benjamin Guthier, Christopher Hipp, Johannes Kiess,
Wolfgang Effelsberg
Warping-based Video Retargeting for Stereoscopic Video
IEEE International Conference on Image Processing (
ICIP),
pp. 2898-2902, 2014
[PDF]
[BibTeX] [link]
Johannes Kiess, Daniel Gritzner, Benjamin Guthier, Stephan Kopf,
Wolfgang Effelsberg
GPU Video Retargeting with
Parallelized SeamCrop
Proc. of the 5th ACM
Multimedia Systems Conference (MMSYS), pp.
139-147, March 2014
[PDF]
[BibTeX] [link]
2013
Benjamin Guthier, Stephan Kopf, Wolfgang Effelsberg
Algorithms for a real-time HDR
video system
ELSEVIER Pattern Recognition
Letters (PATREC), Vol. 34 (1), Pages 25–33, January
2013
[PDF] [BibTeX] [link]
Torben Dittrich, Stephan Kopf, Philipp Schaber, Benjamin Guthier,
Wolfgang Effelsberg
Saliency Detection for
Stereoscopic Video
Proc. of the 4th ACM Multimedia
Systems Conference (MMSYS), pp. 12-23, February
2013
[PDF] [BibTeX] [link]
Stefan Wilk, Stephan Kopf, Wolfgang Effelsberg
Social Video: A Collaborative
Video Annotation Environment to Support E-Learning
Proc. of World Conference on Educational
Multimedia, Hypermedia and Telecommunications (EdMedia),
pp. 1228-1237, June 2013
[PDF]
[BibTeX] [link]
Daniel Schön, Melanie Klinger, Stephan Kopf, Wolfgang Effelsberg
HomeQuiz: Blending paper sheets
with mobile self-assessment tests
Proc. of World Conference on Educational
Multimedia, Hypermedia and Telecommunications (EdMedia),
pp. 1446-1454, June 2013
[PDF]
[BibTeX] [link]
Benjamin Guthier, Kalun Ho, Stephan Kopf, Wolfgang Effelsberg
Determining exposure values from
HDR histograms for smartphone photography
Proc. of the 21st ACM
international conference on Multimedia (ACM MM), pp. 425-426,
2013
[PDF] [BibTeX] [link]
2012
Daniel Schön, Melanie Klinger, Stephan Kopf, Wolfgang Effelsberg
Mobile Quiz– A Lecture Survey
Tool using Smartphones and QR Tags
International Journal of Digital
Information and Wireless Communications (IJDIWC), Vol. 2
(3), pp. 231-244, July 2012
[PDF]
[BibTeX] [link]
Benjamin Guthier, Stephan Kopf, Wolfgang Effelsberg
A Real-Time System for Capturing
HDR Videos
Proc. of 20th ACM international
conference on ACM Multimedia (MM), pp. 1473 – 1476, 2012
[PDF] [BibTeX] [link]
Stephan Kopf, Stefan Wilk, Wolfgang Effelsberg
Bringing Videos to Social Media
Proc. of IEEE International
Conference on Multimedia and Expo (ICME), pp. 681 – 686,
2012
[PDF] [BibTeX] [Video] [link]
Benjamin Guthier, Stephan Kopf, Matthias Wichtlhuber, Wolfgang
Effelsberg
Parallel Algorithms for
Histogram-based Image Registration
Proc. of 19th International
Conference on Systems, Signals and Image Processing
(IWSSIP), pp. 172 – 175, April 2012
[PDF] [BibTeX] [link]
Sascha Schnaufer, Johannes Kiess, Hendrik Lemelson, Stephan Kopf,
Sebastian Geiger, Wolfgang Effelsberg
Proximity Detection and Message
Exchange in WLANs
11th IEEE International
Symposium on Network Computing and Applications (NCA),
pp.276-280, August 2012
[BibTeX]
[link]
Daniel Schön, Stephan Kopf, Stephan Schulz, Wolfgang Effelsberg
Integrating a Lightweight Mobile
Quiz on Mobile Devices into the Existing University
Infrastructure
World Conference on Educational
Media and Technology (EdMedia), pp. 1901-1907, 2012
[PDF] [BibTeX] [link]
Stefan Wilk, Stephan Kopf, Wolfgang Effelsberg
Robust Tracking for Interactive
Social Video
Proc. of IEEE Workshop on
Applications of Computer Vision (WACV), pp. 105 - 110,
2012
[PDF] [BibTeX] [link]
Tonio Triebel, Max Lehn, Robert Rehner, Benjamin Guthier, Stephan
Kopf, Wolfgang Effelsberg
Generation of synthetic workloads
for multiplayer online gaming benchmarks
11th Annual Workshop on Network
and Systems Support for Games (NetGames), pp.1-6,
November 2012
[BibTeX]
[link]
2011
Stephan Kopf
Algorithms for Image and Video
Processing
Habilitation, Faculty of
Business Informatics and Mathematics, University of Mannheim,
September 2011
[BibTeX]
Stephan Kopf, Thomas Haenselmann, Johannes Kiess, Benjamin
Guthier, Wolfgang Effelsberg
Algorithms for video retargeting
Multimedia Tools and
Applications (MTAP), Special Issue: Hot Research Topics in
Multimedia, Vol. 51 (2), pp. 819
– 861, Springer, January 2011
[PDF] [BibTeX] [link]
Philip Mildner, Tonio Triebel, Stephan Kopf, Wolfgang Effelsberg
A scalable Peer-to-Peer-overlay
for real-time massively multiplayer online games
Proc. of the first international
workshop on Distributed Simulation and Online Gaming (DISIO),
pp. 1
– 8, March 2011
(best paper) [PDF] [BibTeX] [link]
Stephan Kopf, Benjamin Guthier, Dirk Farin,
Jungong Han
Analysis and Retargeting of Ball
Sports Video
Proceedings of IEEE Workshop on
Applications of Computer Vision (WACV), pp. 9
– 14, January 2011
[PDF] [BibTeX] [link]
2010
Philipp Schaber, Stephan Kopf, Fabian Bauer, Wolfgang Effelsberg
Robust Digital Watermarking in
Videos Based on Geometric Transformations
Proc. of the 18th ACM
international conference on Multimedia (MM), pp. 1219
– 1222, October 2010
[PDF] [BibTeX] [link]
Benjamin Guthier, Stephan Kopf, Wolfgang Effelsberg
Histogram-based Image
Registration for Real-time High Dynamic Range Videos
Proc. of the 17th IEEE
International Conference on Image Processing (ICIP), pp.
145
– 148, September 2010
[PDF] [BibTeX] [link]
Philipp Schaber, Stephan Kopf, Wolfgang Effelsberg, Niels
Thorwirth
Semi-automatic Registration of
Videos for Improved Watermark Detection
Proc. of the first annual ACM
SIGMM conference on Multimedia systems (MMSYS), pp. 23
– 34, February 2010
[PDF] [BibTeX] [link]
2009
Thomas Haenselmann, Marcel Busse,
Stephan Kopf, Thomas King, Wolfgang Effelsberg
Multi Perspective Panoramic
Imaging
Elsevier Image and Vision Computing Journal,
Vol. 27 (4), pp. 391 – 401, March 2009 [PDF]
[BibTeX] [link]
Fleming Lampi, Hendrik Lemelson, Stephan Kopf, Wolfgang
Effelsberg
A Question Managing Suite for Automatic Lecture
Recording
Interactive Technology and Smart Education Journal,
Vol. 6 (2), pp. 108 – 118, April 2009
[PDF] [BibTeX] [link]
Stephan Kopf, Johannes Kiess, Hendrik Lemelson, Wolfgang
Effelsberg
FSCAV: Fast Seam Carving for Size
Adaptation of Videos
Proc. of the 17th ACM
international conference on Multimedia (MM), pp. 321
– 330, October 2009
[PDF] [BibTeX] [link]
Hendrik Lemelson, Stephan Kopf, Thomas King, Wolfgang
Effelsberg
Improvements for 802.11-based
Location Fingerprinting Systems
Proc. of the 33rd Annual IEEE
International Computer Software and Applications Conference,
Vol. 1, pp. 21
– 28, July
2009
[PDF] [BibTeX] [link]
2008
Stephan Kopf, Wolfgang Effelsberg
Mobile Cinema: Canonical
Processes for Video Adaptation
Multimedia Systems Journal, Springer, Vol. 14
(6), pp. 369 – 375, December 2008 [PDF]
[BibTeX] [link]
Fleming Lampi, Stephan
Kopf, Manuel Benz, Wolfgang Effelsberg
A Virtual Camera Team for
Lecture Recording
IEEE MultiMedia Journal, Vol. 15 (3), pp. 58 –
61, September 2008 [PDF] [BibTeX] [link]
Thomas King, Thomas
Haenselmann, Stephan Kopf, Wolfgang Effelsberg
A Measurement Study on 802.11
Concurrently Used for Positioning and Communications
Proc. of the Third International Symposium on
Wireless Pervasive Computing (ISWPC), pp. 610 – 615, May
2008 [PDF] [BibTeX] [link]
2007
Stephan Kopf
Computer-based content analysis
of digital video archives (in German)
Dissertation, Faculty of Mathematics and Computer Science,
University of Mannheim, Germany, March 2007 [BibTeX]
Stephan Kopf,
Wolfgang Effelsberg
New Teaching and Learning
Technologies for Interactive Lectures
Advanced Technology for Learning Journal, ACTA
Press, Vol. 4 (2), pp. 60 – 67, March 2007 [PDF] [BibTeX] [link]
Thomas King,
Thomas Haenselmann, Stephan Kopf, Wolfgang Effelsberg
Overhearing the Wireless
Interface for 802.11-based Positioning Systems
Proc. of the Fifth Annual IEEE International
Conference on Pervasive Computing and Communications
(PerCom), pp. 145 – 150, March 2007 [PDF] [BibTeX] [link]
Stephan Kopf,
Fleming Lampi, Thomas King, Malte Probst, Wolfgang Effelsberg
EDL-Editor: An Application for
Automatic Editing of Lecture Recordings (in German)
Proc. of DeLFI 2007: Die 5. e-Learning Fachtagung
Informatik der Gesellschaft für Informatik, pp. 33 – 44,
September 2007 (best
paper session) [PDF] [BibTeX] [link]
Fleming Lampi,
Stephan Kopf, Wolfgang Effelsberg
Automatic FSM-Based Video
Directors for Lecture Recording
Proc. of the World Conference on Educational
Multimedia, Hypermedia & Telecommunications (ED-MEDIA
), pp. 1475 – 1480, June
2007 [PDF] [BibTeX] [link]
Hendrik Lemelson,
Thomas King, Stephan Kopf, Wolfgang Effelsberg
On the Use of Various Power
Levels to Improve Wireless LAN-based Positioning – Using
Multiple Power Levels With Fingerprinting Algorithms
Proc. of the International Conference on Wireless
Information Networks and Systems (WINSYS), pp. 225 – 231, July 2007 [PDF] [BibTeX] [link]
2006
Thomas King, Thomas Haenselmann,
Stephan Kopf, Wolfgang Effelsberg
Positioning with Wireless-LAN
and Bluetooth (in German)
Praxis der Informationsverarbeitung und
Kommunikation Journal, Vol. 29 (1), pp. 9 – 17, March 2006 [PDF] [BibTeX] [link]
Stephan Kopf, Fleming
Lampi, Thomas King, Wolfgang Effelsberg
Automatic Scaling and Cropping
of Videos for Devices with Limited Screen Resolution
Proc. of the 14th ACM
international conference on Multimedia (MM) (Video Demo),
pp. 957 – 958, October 2006 [PDF] [Video]
[BibTeX] [link]
Stephan Kopf, Thomas King, Fleming Lampi, Wolfgang Effelsberg
Video Color Adaptation for
Mobile Devices
Proc. of the 14th ACM
international conference on Multimedia (MM) (Video Demo), pp. 963
– 964,
October 2006 [PDF] [Video]
[BibTeX] [link]
Thomas King,
Stephan Kopf, Thomas Haenselmann, Christian Lubberger, Wolfgang
Effelsberg
COMPASS: A Probabilistic Indoor
Positioning System Based on 802.11 and Digital Compasses
Proc. of the First ACM International Workshop on
Wireless Network Testbeds, Experimental Evaluation and
Characterization (WiNTECH), pp. 34 – 40, September 2006 [PDF] [BibTeX] [link]
2005
Stephan Kopf, Thomas
Haenselmann, Wolfgang Effelsberg
Enhancing Curvature Scale Space
Features for Robust Shape Classification
Proc. of IEEE International Conference on Multimedia
and Expo (ICME), pp. 478 – 481, July
2005 [PDF] [BibTeX] [link]
Till Aldinger,
Stephan Kopf, Nicolai Scheele, Wolfgang Effelsberg
Participatory Simulation of a
Stock Exchange
Proc. of the World Conference on Educational
Multimedia, Hypermedia & Telecommunications (ED-MEDIA), pp. 3759 – 3766,
June
2005 [PDF] [BibTeX] [link]
2004
Stephan Kopf, Thomas
Haenselmann, Dirk Farin, Wolfgang Effelsberg
Automatic Generation of Video
Summaries for Historical Films
Proc. of IEEE International Conference on Multimedia
and Expo (ICME), Vol.
3, pp. 2067 – 2070,
June 2004 [PDF] [BibTeX] [link]
Stephan Kopf,
Thomas Haenselmann, Dirk Farin, Wolfgang Effelsberg
Automatic Generation of
Summaries for the Web
Proc. of IS&T/SPIE
Electronic Imaging (EI), Vol. 5307, pp. 417 – 428, January 2004 [PDF] [BibTeX] [link]
2003
Dirk Farin, Thomas
Haenselmann, Stephan Kopf, Gerald Kühne and Wolfgang Effelsberg
Segmentation and Classification of Moving Video Objects
In: B. Furht and O. Marques (editors), Handbook of Video
Databases, Vol. 8, pp. 561 – 591. CRC Press, September
2003 [PDF] [BibTeX] [link]
2001
Stephan Richter, Gerald
Kühne, Oliver Schuster
Contour-based Classification of
Video Objects
Proc. of IS&T/SPIE
Electronic Imaging (EI), Vol. 4315, pp. 608 – 618, January 2001 [PDF] [BibTeX] [link]
Gerald Kühne,
Stephan Richter, Markus Beier
Motion-based Segmentation and
Contour-based Classification of Video Objects
Proc. of the 9th ACM
international conference on Multimedia (MM),
pp. 41 – 50, September
2001 [PDF] [BibTeX] [link]
Gerald Kühne,
Joachim Weickert, Oliver Schuster, Stephan Richter
A Tensor-driven Active Contour
Model for Moving Object Segmentation
Proc. of IEEE International Conference on Image
Processing (ICIP),
pp. 73 – 76, October 2001 [PDF] [BibTeX] [link]
2000
Stephan Richter
Object Recognition in Image
Sequences based on Curvature Scale Space Features (in German)
Diploma Thesis, School of Business
Informatics and Mathematics, University of Mannheim, Germany
, University of Mannheim, March 2000 [BibTeX]