Universiti Teknologi Malaysia Institutional Repository

Defect detection in thermal image for nondestructive evaluation of petrochemical equipments

Heriansyah, Rudi and Abu-Bakar, S. A. R. (2009) Defect detection in thermal image for nondestructive evaluation of petrochemical equipments. NDT & E International, 42 (8). pp. 729-740. ISSN 09638695

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Official URL: http://dx.doi.org/10.1016/j.ndteint.2009.06.008

Abstract

This paper proposes a method for segmenting defects depicted in a thermal image of petrochemical equipments by means of passive thermography. The technique first enhances the contrast of the defects based on local neighborhood pixel intensity operation. This local intensity operation works in two modes, either brightening the pixels for detecting hot spots or darkening the pixels for detecting cold spots. The next step is to segment the defects using simple histogram-based thresholding techniques. We propose three thresholding methods: mean absolute thresholding (MAT), mean relative thresholding (MRT), and minimum frequency thresholding (MFT). Compared to existing techniques, we found that our proposed methods have better detection and success rate.

Item Type:Article
Uncontrolled Keywords:defect detection, infrared thermography, petrochemical equipments, thermal image
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Computer Science and Information System (Formerly known)
ID Code:13306
Deposited By: Ms Zalinda Shuratman
Deposited On:03 Aug 2011 07:12
Last Modified:03 Aug 2011 07:12

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