@inproceedings{MuellerFischerLehmann2006, author = {M{\"u}ller, Karsten and Fischer, Benedikt and Lehmann, Thomas}, title = {Einsatzm{\"o}glichkeiten von Bilderkennungsverfahren zur Zustandserfassung von Kanalisationen}, series = {7. K{\"o}lner Kanal Kolloquium : 06. und 07. September 2006 im Maternushaus, K{\"o}ln / hrsg. von J. Pinnekamp. Aachener Schriften zur Stadtentw{\"a}sserung. Bd. 9}, booktitle = {7. K{\"o}lner Kanal Kolloquium : 06. und 07. September 2006 im Maternushaus, K{\"o}ln / hrsg. von J. Pinnekamp. Aachener Schriften zur Stadtentw{\"a}sserung. Bd. 9}, publisher = {Ges. zur F{\"o}rderung der Siedlungswasserwirtschaft an der RWTH Aachen}, address = {Aachen}, isbn = {3-938996-02-1}, pages = {16/1 -- 16/18}, year = {2006}, language = {de} } @article{KirsteinMuellerWaleckiMingersetal.2012, author = {Kirstein, Simon and M{\"u}ller, Karsten and Walecki-Mingers, Mark and Deserno, Thomas M.}, title = {Robust adaptive flow line detection in sewer pipes}, series = {Automation in construction}, journal = {Automation in construction}, number = {21}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1872-7891 (E-Journal) ; 0926-5805 (Print)}, doi = {10.1016/j.autcon.2011.05.009}, pages = {24 -- 31}, year = {2012}, abstract = {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.}, language = {en} } @inproceedings{SiekmannMueller2011, author = {Siekmann, Thomas and M{\"u}ller, Karsten}, title = {Adaptive potential of the stormwater management in urban areas faced by the climate change}, series = {12th International Conference on Urban Drainage, Porto Alegre/Brazil, 11-16 September 2011}, booktitle = {12th International Conference on Urban Drainage, Porto Alegre/Brazil, 11-16 September 2011}, pages = {9 S.}, year = {2011}, language = {en} } @article{SiekmannMueller2011, author = {Siekmann, Thomas and M{\"u}ller, Karsten}, title = {Anpassungspotenziale der konventionellen Regenwasserbehandlung im Mischsystem an Auswirkungen des Klimawandels}, series = {Energie-, Wasser-Praxis : Fachzeitschrift f{\"u}r die Energie- und Wasser-Praxis. Bd. 62 (2011), Spezial LESAM 2011}, journal = {Energie-, Wasser-Praxis : Fachzeitschrift f{\"u}r die Energie- und Wasser-Praxis. Bd. 62 (2011), Spezial LESAM 2011}, publisher = {DVGW}, address = {Bonn}, issn = {1436-6134}, pages = {48 -- 51}, year = {2011}, language = {de} }