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Smart Structures and Systems Volume 30, Number 3, September 2022 , pages 287-301 DOI: https://doi.org/10.12989/sss.2022.30.3.287 |
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Investigation of the super-resolution methods for vision based structural measurement |
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Lijun Wu, Zhouwei Cai, Chenghao Lin, Zhicong Chen, Shuying Cheng and Peijie Lin
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| Abstract | ||
| The machine-vision based structural displacement measurement methods are widely used due to its flexible deployment and non-contact measurement characteristics. The accuracy of vision measurement is directly related to the image resolution. In the field of computer vision, super-resolution reconstruction is an emerging method to improve image resolution. Particularly, the deep-learning based image super-resolution methods have shown great potential for improving image resolution and thus the machine-vision based measurement. In this article, we firstly review the latest progress of several deep learning based super-resolution models, together with the public benchmark datasets and the performance evaluation index. Secondly, we construct a binocular visual measurement platform to measure the distances of the adjacent corners on a chessboard that is universally used as a target when measuring the structure displacement via machine-vision based approaches. And then, several typical deep learning based super resolution algorithms are employed to improve the visual measurement performance. Experimental results show that super-resolution reconstruction technology can improve the accuracy of distance measurement of adjacent corners. According to the experimental results, one can find that the measurement accuracy improvement of the super resolution algorithms is not consistent with the existing quantitative performance evaluation index. Lastly, the current challenges and future trends of super resolution algorithms for visual measurement applications are pointed out. | ||
| Key Words | ||
| deep learning; machine vision; structural measurement; super-resolution reconstruction | ||
| Address | ||
| College of Physics and Information Engineering, Fuzhou University, Fuzhou 350116, China. | ||