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Comparison Analysis of Machine Learning for Concrete Crack Depths Prediction Using Thermal Image and Environmental Parameters

열화상 이미지와 환경변수를 이용한 콘크리트 균열 깊이 예측 머신 러닝 분석

  • Kim, Jihyung (School of Civil, Environmental, and Architectural Engineering, Korea University) ;
  • Jang, Arum (School of Civil, Environmental, and Architectural Engineering, Korea University) ;
  • Park, Min Jae (School of Civil, Environmental, and Architectural Engineering, Korea University) ;
  • Ju, Young K. (School of Civil, Environmental, and Architectural Engineering, Korea University)
  • 김지형 (고려대학교 건축사회환경공학과) ;
  • 장아름 (고려대학교 건축사회환경공학과) ;
  • 박민재 (고려대학교 건축사회환경공학부) ;
  • 주영규 (고려대학교 건축사회환경공학부)
  • Received : 2021.05.17
  • Accepted : 2021.05.31
  • Published : 2021.06.15

Abstract

This study presents the estimation of crack depth by analyzing temperatures extracted from thermal images and environmental parameters such as air temperature, air humidity, illumination. The statistics of all acquired features and the correlation coefficient among thermal images and environmental parameters are presented. The concrete crack depths were predicted by four different machine learning models: Multi-Layer Perceptron (MLP), Random Forest (RF), Gradient Boosting (GB), and AdaBoost (AB). The machine learning algorithms are validated by the coefficient of determination, accuracy, and Mean Absolute Percentage Error (MAPE). The AB model had a great performance among the four models due to the non-linearity of features and weak learner aggregation with weights on misclassified data. The maximum depth 11 of the base estimator in the AB model is efficient with high performance with 97.6% of accuracy and 0.07% of MAPE. Feature importances, permutation importance, and partial dependence are analyzed in the AB model. The results show that the marginal effect of air humidity, crack depth, and crack temperature in order is higher than that of the others.

Keywords

Acknowledgement

이 논문은 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구입니다. (No. NRF-2018R1A4A1026027,2020R1A2C3005687)

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