Protocols for Image Processing based Underwater Inspection of Infrastructure Elements

11th International Conference on Damage Assessment of Structures

物理学;材料科学

O'Byrne, Michael^1,5 ; Ghosh, Bidisha^2 ; Schoefs, Franck^3,4 ; Pakrashi, Vikram^1,5

Beaufort, Environmental Research Institute, University College Cork, Ireland^1

Department of Civil, Structural and Environmental Engineering, Trinity College Dublin, Ireland^2

LUNAM Université, Université de Nantes-Ecole Centrale de Nantes, CNRS, GeM, Institute for Research in Civil and Mechanical Engineering, University of Nantes, Nantes, France^3

IXEAD/CAPACITES Society, Nantes, France^4

Dynamical Systems and Risk Laboratory, Civil and Environmental Engineering, School of Engineering, University College Cork, Ireland^5

关键词: Environmental conditions;    Image processing;    methods;    Image-based methods;    Imaging conditions;    Stereo imaging;    Structural degradation;    Underwater inspections;    Underwater vehicles;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/628/1/012130/pdf
DOI  :  10.1088/1742-6596/628/1/012130

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Image processing can be an important tool for inspecting underwater infrastructure elements like bridge piers and pile wharves. Underwater inspection often relies on visual descriptions of divers who are not necessarily trained in specifics of structural degradation and the information may often be vague, prone to error or open to significant variation of interpretation. Underwater vehicles, on the other hand can be quite expensive to deal with for such inspections. Additionally, there is now significant encouragement globally towards the deployment of more offshore renewable wind turbines and wave devices and the requirement for underwater inspection can be expected to increase significantly in the coming years. While the merit of image processing based assessment of the condition of underwater structures is understood to a certain degree, there is no existing protocol on such image based methods. This paper discusses and describes an image processing protocol for underwater inspection of structures. A stereo imaging image processing method is considered in this regard and protocols are suggested for image storage, imaging, diving, and inspection. A combined underwater imaging protocol is finally presented which can be used for a variety of situations within a range of image scenes and environmental conditions affecting the imaging conditions. An example of detecting marine growth is presented of a structure in Cork Harbour, Ireland.