Computer and Modernization ›› 2023, Vol. 0 ›› Issue (06): 82-88.doi: 10.3969/j.issn.1006-2475.2023.06.014

• IMAGE PROCESSING • Previous Articles     Next Articles

A Cascaded Insulator Defect Detection Model Combining Semantic Segmentation and Object Detection

YE Li-ming, CHEN Wei-wen   

  1. Beijing Normal University-Hong Kong Baptist University United International College, Zhuhai 519087, China
  • Received:2022-05-13 Revised:2022-09-09 Online:2023-06-28 Published:2023-06-28

Abstract: Insulator defect detection is an important part of the routine inspection of substations. Using the video surveillance images in the substation, we propose a cascaded insulator defect detection model that combines semantic segmentation with object detection aiming at the low detection accuracy of the insulator defect detection model. The model consists of three modules: Insulator segmentation, insulator cutting and defect detection. The insulator segmentation module separates the insulator from the complex environment and proposes an edge enhancement loss function. The insulator cutting module uses the image processing method to obtain the insulator region aligned with the axis. The defect detection module completes the defect detection. Experiment results show that the accuracy of edge-enhanced Unet for insulator segmentation reaches 83.99%, and the accuracy of RetinaNet with improved anchor generation method for defect detection reaches 63.32%. Compared with the single-stage insulator defect detection model, the proposed cascade insulator defect detection model can effectively eliminate the interference of environment, detecting most of the insulator defects.

Key words: cascaded insulator defect detection model, image processing, semantic segmentation, object detection

CLC Number: