title: A comparative study of principal component analysis and independent component analysis in eddy current pulsed thermography data processing.
abstract: Eddy Current Pulsed Thermography (ECPT), an emerging Non-Destructive Testing and Evaluation technique, has been applied for a wide range of materials. The lateral heat diffusion leads to decreasing of temperature contrast between defect and defect-free area. To enhance the flaw contrast, different statistical methods, such as Principal Component Analysis and Independent Component Analysis, have been proposed for thermography image sequences processing in recent years. However, there is lack of direct and detailed independent comparisons in both algorithm implementations. The aim of this article is to compare the two methods and to determine the optimized technique for flaw contrast enhancement in ECPT data. Verification experiments are conducted on artificial and thermal fatigue nature crack detection.
authors.affiliation: School of Automation Engineering, University of Electronic Science and Technology of China, China.
authors.forename: Libing
authors.initials: L
authors.lastname: Bai
authors.forename: Bin
authors.initials: B
authors.lastname: Gao
authors.forename: Shulin
authors.initials: S
authors.lastname: Tian
authors.forename: Yuhua
authors.initials: Y
authors.lastname: Cheng
authors.forename: Yifan
authors.initials: Y
authors.lastname: Chen
authors.forename: Gui Yun
authors.initials: GY
authors.lastname: Tian
authors.forename: W L
authors.initials: WL
authors.lastname: Woo