Impact of loss functions on semantic segmentation in far‐field monitoring
Although previous research laid the foundation for vision‐based monitoring systems using convolutional neural networks (CNNs), too little attention has been paid to the challenges associated with data imbalance and varying object sizes in far‐field monitoring. To fill the knowledge gap, this paper i...
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| Published in: | Computer-aided civil and infrastructure engineering Vol. 38; no. 3; pp. 372 - 390 |
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| Main Authors: | , , , |
| Format: | Journal Article |
| Language: | English |
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Hoboken
Wiley Subscription Services, Inc
01.02.2023
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| ISSN: | 1093-9687, 1467-8667 |
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| Abstract | Although previous research laid the foundation for vision‐based monitoring systems using convolutional neural networks (CNNs), too little attention has been paid to the challenges associated with data imbalance and varying object sizes in far‐field monitoring. To fill the knowledge gap, this paper investigates various loss functions to design a customized loss function to address the challenges. Scaffold installation operations recorded by camcorders were selected as the subject of analysis in a far‐field surveillance setting. It was confirmed that the data imbalance between the workers, hardhats, harnesses, straps, and hooks caused poor performances especially for small size objects. This problem was mitigated by employing a region‐based loss and Focal loss terms in the loss function of segmentation models. The findings illustrate the importance of the loss function design in improving performance of CNN models for far‐field construction site monitoring. |
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| AbstractList | Although previous research laid the foundation for vision‐based monitoring systems using convolutional neural networks (CNNs), too little attention has been paid to the challenges associated with data imbalance and varying object sizes in far‐field monitoring. To fill the knowledge gap, this paper investigates various loss functions to design a customized loss function to address the challenges. Scaffold installation operations recorded by camcorders were selected as the subject of analysis in a far‐field surveillance setting. It was confirmed that the data imbalance between the workers, hardhats, harnesses, straps, and hooks caused poor performances especially for small size objects. This problem was mitigated by employing a region‐based loss and Focal loss terms in the loss function of segmentation models. The findings illustrate the importance of the loss function design in improving performance of CNN models for far‐field construction site monitoring. |
| Author | Chern, Wei‐Chih Nguyen, Tam V. Kim, Hongjo Asari, Vijayan K. |
| Author_xml | – sequence: 1 givenname: Wei‐Chih surname: Chern fullname: Chern, Wei‐Chih organization: University of Dayton – sequence: 2 givenname: Tam V. surname: Nguyen fullname: Nguyen, Tam V. organization: University of Dayton – sequence: 3 givenname: Vijayan K. surname: Asari fullname: Asari, Vijayan K. organization: University of Dayton – sequence: 4 givenname: Hongjo surname: Kim fullname: Kim, Hongjo email: hongjo@yonsei.ac.kr organization: Yonsei University |
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| Title | Impact of loss functions on semantic segmentation in far‐field monitoring |
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