Computer Vision–Based Counting Model for Dense Steel Pipe on Construction Sites

Author(s):  
Yang Li ◽  
Jun Chen
2019 ◽  
Vol 42 ◽  
pp. 100981 ◽  
Author(s):  
Ran Wei ◽  
Peter E.D. Love ◽  
Weili Fang ◽  
Hanbin Luo ◽  
Shuangjie Xu

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4478
Author(s):  
Jiangying Zhao ◽  
Yongbiao Hu ◽  
Mingrui Tian

Excavation is one of the broadest activities in the construction industry, often affected by safety and productivity. To address these problems, it is necessary for construction sites to automatically monitor the poses of excavator manipulators in real time. Based on computer vision (CV) technology, an approach, through a monocular camera and marker, was proposed to estimate the pose parameters (including orientation and position) of the excavator manipulator. To simulate the pose estimation process, a measurement system was established with a common camera and marker. Through comprehensive experiments and error analysis, this approach showed that the maximum detectable depth of the system is greater than 11 m, the orientation error is less than 8.5°, and the position error is less than 22 mm. A prototype of the system that proved the feasibility of the proposed method was tested. Furthermore, this study provides an alternative CV technology for monitoring construction machines.


2021 ◽  
Author(s):  
Yusheng Huang ◽  
Amin Hammad ◽  
Ghazaleh Torabi ◽  
Ali Ghelmani ◽  
Michel Guevremont

2020 ◽  
Vol 27 (5) ◽  
pp. 1145-1168
Author(s):  
Dianchen Zhu ◽  
Huiying Wen ◽  
Yichuan Deng

Purpose To improve insufficient management by artificial management, especially for traffic accidents that occur at crossroads, the purpose of this paper is to develop a pro-active warning system for crossroads at construction sites. Although prior studies have made efforts to develop warning systems for construction sites, most of them paid attention to the construction process, while the accidents that occur at crossroads were probably overlooked. Design/methodology/approach By summarizing the main reasons resulting for those accidents occurring at crossroads, a pro-active warning system that could provide six functions for countermeasures was designed. Several approaches relating to computer vision and a prediction algorithm were applied and proposed to realize the setting functions. Findings One 12-hour video that films a crossroad at a construction site was selected as the original data. The test results show that all designed functions could operate normally, several predicted dangerous situations could be detected and corresponding proper warnings could be given. To validate the applicability of this system, another 36-hour video data were chosen for a performance test, and the findings indicate that all applied algorithms show a significant fitness of the data. Originality/value Computer vision algorithms have been widely used in previous studies to address video data or monitoring information; however, few of them have demonstrated the high applicability of identification and classification of the different participants at construction sites. In addition, none of these studies attempted to use a dynamic prediction algorithm to predict risky events, which could provide significant information for relevant active warnings.


2020 ◽  
Vol 119 ◽  
pp. 103310 ◽  
Author(s):  
Weili Fang ◽  
Ling Ma ◽  
Peter E.D. Love ◽  
Hanbin Luo ◽  
Lieyun Ding ◽  
...  

Buildings ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 409
Author(s):  
Wenyao Liu ◽  
Qingfeng Meng ◽  
Zhen Li ◽  
Xin Hu

The unsafe behavior of construction workers is one of the main causes of safety accidents at construction sites. To reduce the incidence of construction accidents and improve the safety performance of construction projects, there is a need to identify risky factors by monitoring the behavior of construction workers. Computer vision (CV) technology, which is a powerful and automated tool used for extracting images and video information from construction sites, has been recognized and adopted as an effective construction site monitoring technology for the identification of risky factors resulting from the unsafe behavior of construction workers. In this article, we introduce the research background of this field and conduct a systematic statistical analysis of the relevant literature in this field through the bibliometric analysis method. Thereafter, we adopt a content-based analysis method to depict the historical explorations in the field. On this basis, the limitations and challenges in this field are identified, and future research directions are proposed. It is found that CV technology can effectively monitor the unsafe behaviors of construction workers. The research findings can enhance people’s understanding of construction safety management.


1985 ◽  
Vol 30 (1) ◽  
pp. 47-47
Author(s):  
Herman Bouma
Keyword(s):  

1983 ◽  
Vol 2 (5) ◽  
pp. 130
Author(s):  
J.A. Losty ◽  
P.R. Watkins

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