Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Monitoring Crack Changes in Concrete Structures
Abstract: This study proposes a crack‐monitoring system to quantify the change of cracks from multitemporal images during the monitoring period. A series of images were taken from an off‐the‐shelf digital camera. Concrete cracks were extracted from the digital images by employing a series of image‐processing techniques. The image coordinates and orientation of same cracks can be changed since the position and direction of the portable camera vary at every exposure time. To monitor the crack changes (width and length), it is critical to transform the image coordinates of cracks extracted from each image into the same object coordinates of the concrete surface. In this study, such a geometric relationship was automatically recovered using the two‐dimensional (2D) projective transformation based on the modified iterated Hough transform (MIHT) algorithm, the result of which solved the transformation parameters. To improve the computational operation of MIHT, regions of parameter estimation were also investigated. The developed algorithms were applied to monitor the crack of the concrete specimen. As a result, the change of cracks on the concrete specimen was successfully detected and accurately quantified.
Monitoring Crack Changes in Concrete Structures
Abstract: This study proposes a crack‐monitoring system to quantify the change of cracks from multitemporal images during the monitoring period. A series of images were taken from an off‐the‐shelf digital camera. Concrete cracks were extracted from the digital images by employing a series of image‐processing techniques. The image coordinates and orientation of same cracks can be changed since the position and direction of the portable camera vary at every exposure time. To monitor the crack changes (width and length), it is critical to transform the image coordinates of cracks extracted from each image into the same object coordinates of the concrete surface. In this study, such a geometric relationship was automatically recovered using the two‐dimensional (2D) projective transformation based on the modified iterated Hough transform (MIHT) algorithm, the result of which solved the transformation parameters. To improve the computational operation of MIHT, regions of parameter estimation were also investigated. The developed algorithms were applied to monitor the crack of the concrete specimen. As a result, the change of cracks on the concrete specimen was successfully detected and accurately quantified.
Monitoring Crack Changes in Concrete Structures
Sohn, Hong‐Gyoo (Autor:in) / Lim, Yun‐Mook (Autor:in) / Yun, Kong‐Hyun (Autor:in) / Kim, Gi‐Hong (Autor:in)
Computer‐Aided Civil and Infrastructure Engineering ; 20 ; 52-61
01.01.2005
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Monitoring Crack Changes in Concrete Structures
| Online Contents | 2005
Time-related monitoring of crack changes on concrete structures
| British Library Conference Proceedings | 2003
Early-age crack monitoring of concrete structures
| Tema Archiv | 2009
Carbon nanotube/cement composites for crack monitoring of concrete structures
| British Library Online Contents | 2017
A Novel Design for Crack Width Monitoring of Concrete Structures
| Trans Tech Publications | 2011