Automatic Relevance Determination of Adaptive Variational Bayes Sparse Decomposition for Micro-Cracks Detection in Thermal Sensing

Lu, Peng, Gao, Bin, Woo, Wai Lok, Li, Xiaoqing and Tian, Gui Yun (2017) Automatic Relevance Determination of Adaptive Variational Bayes Sparse Decomposition for Micro-Cracks Detection in Thermal Sensing. IEEE Sensors Journal, 17 (16). pp. 5220-5230. ISSN 1530-437X

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Abstract

Induction thermography has been applied as an emerging non-destructive testing and evaluation technique for a wide range of conductive materials. The infrared vision sensing acquired image sequences contain valuable information in both spatial and time domain. However, automatic and precisely extracting defect pattern from thermal video remains a challenge. In order to accurately find anomalous patterns for defect detection and further quantitative nondestructive evaluation, we propose an automatic relevance determination approach with adaptive variational Bayes for sub-group sparse decomposition. A subset of scale parameters is driven to a small low bound in the inference, with the pruning the corresponding spurious components. In addition, an internal sub-sparse grouping as well as adaptive fine-tuned is built into the proposed algorithm to control the sparsity. Experimental tests on both artificially and nature defects and comparisons with other methods have been conducted to verify the efficacy of the proposed method.

Item Type:	Article
Uncontrolled Keywords:	Automatic relevance determination, patches, inductive thermal imaging, variational Bayes, adaptive sparse control
Subjects:	G400 Computer Science
Department:	Faculties > Engineering and Environment > Computer and Information Sciences
Depositing User:	Becky Skoyles
Date Deposited:	25 Mar 2019 10:05
Last Modified:	10 Oct 2019 21:15
URI:	http://nrl.northumbria.ac.uk/id/eprint/38519

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