TY  - CHAP
A1  - Alhwarin, Faraj
A1  - Ferrein, Alexander
A1  - Scholl, Ingrid
T1  - IR stereo kinect: improving depth images by combining structured light with IR stereo
T2  - PRICAI 2014: Trends in artificial intelligence : 13th Pacific Rim International Conference on Artificial Intelligence : Gold Coast, QLD, Australia, December 1-5, 2014 : proceedings. (Lecture notes in computer science ; vol. 8862)
N2  - RGB-D sensors such as the Microsoft Kinect or the Asus Xtion are inexpensive 3D sensors. A depth image is computed by calculating the distortion of a known infrared light (IR) pattern which is projected into the scene. While these sensors are great devices they have some limitations. The distance they can measure is limited and they suffer from reflection problems on transparent, shiny, or very matte and absorbing objects. If more than one RGB-D camera is used the IR patterns interfere with each other. This results in a massive loss of depth information. In this paper, we present a simple and powerful method to overcome these problems. We propose a stereo RGB-D camera system which uses the pros of RGB-D cameras and combine them with the pros of stereo camera systems. The idea is to utilize the IR images of each two sensors as a stereo pair to generate a depth map. The IR patterns emitted by IR projectors are exploited here to enhance the dense stereo matching even if the observed objects or surfaces are texture-less or transparent. The resulting disparity map is then fused with the depth map offered by the RGB-D sensor to fill the regions and the holes that appear because of interference, or due to transparent or reflective objects. Our results show that the density of depth information is increased especially for transparent, shiny or matte objects.
Y1  - 2014
SN  - 978-3-319-13559-5 (Print) ; 978-3-319-13560-1 (E-Book)
U6  - http://dx.doi.org/10.1007/978-3-319-13560-1_33
SP  - 409
EP  - 421
PB  - Springer
CY  - München
ER  - 
TY  - JOUR
A1  - Ferrein, Alexander
A1  - Beck, Daniel
A1  - Lakemeyer, Gerhard
T1  - Landmark-Based Representations for Navigating Holonomic Soccer Robots / Beck, Daniel ; Ferrein, Alexander ; Lakemeyer, Gerhard
JF  - RoboCup 2008 : robot soccer world cup XII / Luca Iocchi ... (eds.)
Y1  - 2009
SN  - 978-3-642-02921-9
N1  - Lecture Notes in Computer Science ; 5399
SP  - 25
EP  - 36
PB  - Springer
CY  - Heidelberg
ER  - 
TY  - JOUR
A1  - Ferrein, Alexander
A1  - Strack, Andreas
A1  - Lakemeyer, Gerhard
T1  - Laser-Based Localization with Sparse Landmarks  / Strack, Andreas ; Ferrein, Alexander ; Lakemeyer, Gerhard
JF  - RoboCup 2005: Robot Soccer World Cup IX
Y1  - 2006
SN  - 978-3-540-35437-6
N1  - Lecture Notes in Computer Science ; 4020
SP  - 569
EP  - 576
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Ferrein, Alexander
A1  - Konur, Savas
A1  - Lakemeyer, Gerhard
T1  - Learning Decision Trees for Action Selection in Soccer Agents / Konur, Savas ; Ferrein, Alexander ; Lakemeyer, Gerhard
Y1  - 2004
N1  - Proceedings of Workshop on Agents in dynamic and real-time environments
SP  - 1
EP  - 7
ER  - 
TY  - CHAP
A1  - Ferrein, Alexander
A1  - Kallweit, Stephan
A1  - Scholl, Ingrid
A1  - Reichert, Walter
T1  - Learning to Program Mobile Robots in the ROS Summer School Series
T2  - Proceedings 6th International Conference on Robotics in Education (RiE 15)
N2  - The main objective of our ROS Summer School series is to introduce MA level students to program mobile robots with the Robot Operating System (ROS). ROS is a robot middleware that is used my many research institutions world-wide. Therefore, many state-of-the-art algorithms of mobile robotics are available in ROS and can be deployed very easily. As a basic robot platform we deploy a 1/10 RC cart that is wquipped with an Arduino micro-controller to control the servo motors, and an embedded PC that runs ROS. In two weeks, participants get to learn the basics of mobile robotics hands-on. We describe our teaching concepts and our curriculum and report on the learning success of our students.
Y1  - 2015
ER  - 
TY  - CHAP
A1  - Ferrein, Alexander
A1  - Niemüller, Tim
A1  - Schiffer, Stefan
A1  - Lakemeyer, Gerhard
ED  - Boots, Byron
T1  - Lessons learnt from developing the embodied AI platform CAESAR for domestic service robotics
T2  - Designing intelligent robots : reintegrating AI II ; papers from the AAAI spring symposium ; [held March 25 - 27, 2013 in Palo Alto, California, USA, on the campus of Stanford University]. (Technical Report / Association for the Advancement of Artificial Intelligence ; 2013,4)
Y1  - 2013
SN  - 9781577356011
SP  - 21
EP  - 26
ER  - 
TY  - JOUR
A1  - Ferrein, Alexander
T1  - Logic-based robot control in highly dynamic domains  / Ferrein, Alexander ; Lakemeyer, Gerhard
JF  - Robotics and Autonomous Systems. 56 (2008), H. 11
Y1  - 2008
SN  - 0921-8890
SP  - 980
EP  - 991
ER  - 
TY  - JOUR
A1  - Ferrein, Alexander
A1  - Steinbauer, Gerald
T1  - Looking back on 20 Years of RoboCup
JF  - KI - Künstliche Intelligenz
Y1  - 2016
U6  - http://dx.doi.org/10.1007/s13218-016-0443-y
SN  - 1610-1987
VL  - 30
IS  - 3-4
SP  - 321
EP  - 323
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Niemueller, Tim
A1  - Karras, Ulrich
A1  - Ferrein, Alexander
T1  - Meisterschaft der Maschinen: Die Industrial Logistic Liga
JF  - C´t Magazin für Computertechnik
Y1  - 2017
IS  - 26
ER  - 
TY  - CHAP
A1  - Kallweit, Stephan
A1  - Ferrein, Alexander
A1  - Scholl, Ingrid
A1  - Reichert, Walter
T1  - Mobile Autonome Systeme in der Lehre, am Beispiel der ROS Summer School
T2  - Tagungsband AALE 2014 : das Forum für Fachleute der Automatisierungstechnik aus Hochschulen und Wirtschaft ; 11. Fachkonferenz, Regensburg ; [11. Konferenz für Angewandte Automatisierungstechnik in Lehre und Entwicklung / Ostbayerische Technische Hochschule Regensburg; VFAALE, Verein der Freunde und Förderer der Angewandten Automatisierungstechnik]
Y1  - 2014
SN  - 978-3-8356-7142-3
N1  - Die Textverteilung der elektronischen Zweitveröffentlichung entspricht nicht der der o.g. Verlagsausgabe.
SP  - 157
EP  - 163
PB  - Dt. Industrieverl.
CY  - München
ER  -