Automatic Safety Monitoring of Construction Hazard Working Zone: A Semantic Segmentation based Deep Learning Approach

This paper presents an application of Semantic Segmentation-based Deep Learning (DL) technique to achieve real-time safety monitoring of construction hazard working zone, so that the unsafe situation can identified timely to reduce safety risks. Two different Convolutional Neural Network (CNN) based Deep Learning (DL) techniques were adopted for worker identification, and target working zoning, including Faster R-CNN, DeepLab v3+. A sample hazard working zone near building elevator shaft is adopted for case study. The opening of safety fence as well as the working man nearby is identified as a target hazard scenario to be detected. From both of the results of lab and in-situ testing, it is found that all performance indexes including the Recall and Precision during the training process in lab and the Cleanness and Correctness obtained on site surpassed the 95% high criterion values. It is therefore concluded that the proposed method provides the construction safety personnel an effective tool to monitor the risk and prevent the accident for the construction workers in hazard working zones.