A Study on Concrete Efflorescence Assessment using Hyperspectral Camera 


Vol. 32,  No. 6, pp. 98-103, Dec.  2017
10.14346/JKOSOS.2017.32.6.98


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  Abstract

In Korea, the guideline for the bridge safety inspection requests to assess surface degradation, including crack, efflorescence, spalling, and so on, for the rating of concrete bridges. Currently, the assessment of efflorescence is performed based on the visual inspection of expertized engineers, which may result in subjective inspection result. In this study, a novel method using a hyperspectral camera is proposed for objective and accurate assessment of concrete efflorescence. The hyperspectral camera acquires the light intensity for a number of continuous spectral bands of light for each pixel in an image, which makes the hyperspectral imaging technique provides more detailed information than a color camera that collects intensity for only three bands corresponding to RGB (red, green, and blue) colors. A stepwise assessment algorithm is proposed based on the spectral features to decompose efflorescence area from the inspected concrete area. The algorithm is tested in the laboratory test using two concrete specimens, one of which is dark colored with efflorescence on a surface while the other is bright concrete without efflorescence. The test shows high accuracy and applicability of the proposed efflorescence assessment using a hyperspectral camera.

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  Cite this article

[IEEE Style]

김병현, 김대명, 조수진, "A Study on Concrete Efflorescence Assessment using Hyperspectral Camera," Journal of the Korean Society of Safety, vol. 32, no. 6, pp. 98-103, 2017. DOI: 10.14346/JKOSOS.2017.32.6.98.

[ACM Style]

김병현, 김대명, and 조수진. 2017. A Study on Concrete Efflorescence Assessment using Hyperspectral Camera. Journal of the Korean Society of Safety, 32, 6, (2017), 98-103. DOI: 10.14346/JKOSOS.2017.32.6.98.

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