TY  - CHAP
A1  - Müller, Karsten
A1  - Fischer, Benedikt
A1  - Lehmann, Thomas
T1  - Einsatzmöglichkeiten von Bilderkennungsverfahren zur Zustandserfassung von Kanalisationen
T2  - 7. Kölner Kanal Kolloquium : 06. und 07. September 2006 im Maternushaus, Köln / hrsg. von J. Pinnekamp. Aachener Schriften zur Stadtentwässerung. Bd. 9
Y1  - 2006
SN  - 3-938996-02-1
SP  - 16/1
EP  - 16/18
PB  - Ges. zur Förderung der Siedlungswasserwirtschaft an der RWTH Aachen
CY  - Aachen
ER  - 
TY  - JOUR
A1  - Kirstein, Simon
A1  - Müller, Karsten
A1  - Walecki-Mingers, Mark
A1  - Deserno, Thomas M.
T1  - Robust adaptive flow line detection in sewer pipes
JF  - Automation in construction
N2  - As part of a novel approach to automatic sewer inspection, this paper presents a robust algorithm for automatic flow line detection. A large image repository is obtained from about 50,000 m sewers to represent the high variability of real world sewer systems. Automatic image processing combines Canny edge detection, Hough transform for straight lines and cost minimization using Dijkstra's shortest path algorithm. Assuming that flow lines are mostly smoothly connected horizontal structures, piecewise flow line delineation is reduced to a process of selecting adjacent line candidates. Costs are derived from the gap between adjacent candidates and their reliability. A single parameter α enables simple control of the algorithm. The detected flow line may precisely follow the segmented edges (α = 0.0) or minimize gaps at joints (α = 1.0). Both, manual and ground truth-based analysis indicate that α = 0.8 is optimal and independent of the sewer's material. The algorithm forms an essential step to further automation of sewer inspection.
Y1  - 2012
U6  - http://dx.doi.org/10.1016/j.autcon.2011.05.009
SN  - 1872-7891 (E-Journal) ; 0926-5805 (Print)
IS  - 21
SP  - 24
EP  - 31
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Siekmann, Thomas
A1  - Müller, Karsten
T1  - Adaptive potential of the stormwater management in urban areas faced by the climate change
T2  - 12th International Conference on Urban Drainage, Porto Alegre/Brazil, 11-16 September 2011
Y1  - 2011
ER  - 
TY  - JOUR
A1  - Siekmann, Thomas
A1  - Müller, Karsten
T1  - Anpassungspotenziale der konventionellen Regenwasserbehandlung im Mischsystem an Auswirkungen des Klimawandels
JF  - Energie-, Wasser-Praxis : Fachzeitschrift für die Energie- und Wasser-Praxis. Bd. 62 (2011), Spezial LESAM 2011
Y1  - 2011
SN  - 1436-6134
SP  - 48
EP  - 51
PB  - DVGW
CY  - Bonn
ER  -