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http://dx.doi.org/10.5389/KSAE.2021.63.6.039

Evaluation of Optical Porosity of Thuja occidentalis by Image Analysis and Correlation with Aerodynamic Coefficients  

Jang, Dong-hwa (Division of Animal Environment, National Institute of Animal Science (NIAS))
Yang, Ka-Young (Division of Animal Environment, National Institute of Animal Science (NIAS))
Kim, Jong-bok (Division of Animal Environment, National Institute of Animal Science (NIAS))
Kwon, Kyeong-seok (Division of Animal Environment, National Institute of Animal Science (NIAS))
Ha, Taehwan (Division of Animal Environment, National Institute of Animal Science (NIAS))
Publication Information
Journal of The Korean Society of Agricultural Engineers / v.63, no.6, 2021 , pp. 39-47 More about this Journal
Abstract
Reduction effect of the spread of odorant and fine dust through windbreak trees can be predicted through numerical analysis. However, there is a disadvantage that a large space and destructive experiments must be carried out each time to calculate the aerodynamic coefficient of the tree. In order to overcome these shortcomings, In this study, we aimed to estimate the aerodynamic coefficient (C0, C1, C2) by using image processing. Thuja occidentalis, which can be used as windbreak were used as the material. The leaf area index was estimated from the leaf area ratio using image processing with leaf weight, and the optical porosity was calculated through image processing of photos taken from the side while removing the leaves step-by-step. Correlation analysis was conducted with the aerodynamic coefficient of Thuja occidentalis calculated from the wind tunnel test and leaf area index and optical porosity calculated from the image analysis. The aerodynamic coefficient showed positive and negative correlations with the leaf area index and optical porosity, respectively. The results showed that the possibility of estimating the aerodynamic coefficient using image processing.
Keywords
Aerodynamic coefficient; image processing; windbreak tree; leaf area index; optical porosity;
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