Automated Pipe Defect Identification in Underwater Robot Imagery with Deep Learning

Abstract

Underwater pipeline inspection plays a vital role in the proactive maintenance and management of critical marine infrastructure and subaquatic systems. However, the inspection of underwater pipelines presents a challenge due to factors such as light scattering, absorption, restricted visibility, and ambient noise. The advancement of deep learning has introduced powerful techniques for processing large amounts of unstructured and imperfect data collected from underwater environments. This study evaluated the efficacy of the You Only Look Once (YOLO) algorithm, a real-time object detection and localization model based on convolutional neural networks, in identifying and classifying various types of pipeline defects in underwater settings. YOLOv8, the latest evolution in the YOLO family, integrates advanced capabilities, such as anchor-free detection, a cross-stage partial network backbone for efficient feature extraction, and a feature pyramid network+ path aggregation network neck for robust multi-scale object detection, which make it particularly well-suited for complex underwater environments. Due to the lack of suitable open-access datasets for underwater pipeline defects, a custom dataset was captured using a remotely operated vehicle in a controlled environment. This application has the following assets available for use. Extensive experimentation demonstrated that YOLOv8 X-Large consistently outperformed other models in terms of pipe defect detection and classification and achieved a strong balance between precision and recall in identifying pipeline cracks, rust, corners, defective welds, flanges, tapes, and holes. This research establishes the baseline performance of YOLOv8 for underwater defect detection and showcases its potential to enhance the reliability and efficiency of pipeline inspection tasks in challenging underwater environments.

Keywords

YOLO8 / Underwater robot / Object detection / Underwater pipelines / Remotely operated vehicle / Deep learning

RIGHTS & PERMISSIONS

Harbin Engineering University and Springer-Verlag GmbH Germany, part of Springer Nature