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Proceedings Paper

Quantitative assessment in thermal image segmentation for artistic objects
Author(s): Bardia Yousefi; Stefano Sfarra; Xavier P. V. Maldague
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Paper Abstract

The application of the thermal and infrared technology in different areas of research is considerably increasing. These applications involve Non-destructive Testing (NDT), Medical analysis (Computer Aid Diagnosis/Detection- CAD), Arts and Archaeology among many others. In the arts and archaeology field, infrared technology provides significant contributions in term of finding defects of possible impaired regions. This has been done through a wide range of different thermographic experiments and infrared methods. The proposed approach here focuses on application of some known factor analysis methods such as standard Non-Negative Matrix Factorization (NMF) optimized by gradient-descent-based multiplicative rules (SNMF1) and standard NMF optimized by Non-negative least squares (NNLS) active-set algorithm (SNMF2) and eigen decomposition approaches such as Principal Component Thermography (PCT), Candid Covariance-Free Incremental Principal Component Thermography (CCIPCT) to obtain the thermal features. On one hand, these methods are usually applied as preprocessing before clustering for the purpose of segmentation of possible defects. On the other hand, a wavelet based data fusion combines the data of each method with PCT to increase the accuracy of the algorithm. The quantitative assessment of these approaches indicates considerable segmentation along with the reasonable computational complexity. It shows the promising performance and demonstrated a confirmation for the outlined properties. In particular, a polychromatic wooden statue and a fresco were analyzed using the above mentioned methods and interesting results were obtained.

Paper Details

Date Published: 11 July 2017
PDF: 10 pages
Proc. SPIE 10331, Optics for Arts, Architecture, and Archaeology VI, 1033108 (11 July 2017); doi: 10.1117/12.2269754
Show Author Affiliations
Bardia Yousefi, Univ. Laval (Canada)
Stefano Sfarra, Univ. degli Studi dell'Aquila (Italy)
Xavier P. V. Maldague, Univ. Laval (Canada)

Published in SPIE Proceedings Vol. 10331:
Optics for Arts, Architecture, and Archaeology VI
Luca Pezzati; Piotr Targowski, Editor(s)

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