Exposure-Tolerant Imaging Solution for Cultural Heritage Monitoring

This paper describes a simple and cheap solution specifically designed for monitoring the degradation of thin coatings employed for metal protection. The proposed solution employs a commercial photo camera and a frequency-domain-based approach that is capable of highlighting the surface uniformity c...

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Bibliographic Details
Published in:IEEE transactions on instrumentation and measurement 2011-05, Vol.60 (5), p.1691-1698
Main Authors: Corbellini, S, Ferraris, F, Neri, A, Parvis, M, Angelini, E, Grassini, S
Format: Article
Language:English
Subjects:
Brightness
Cameras
Coatings
Conservation
Corrosion
Corrosion prevention
cultural heritage
digital photography
fast Fourier transform (FFT)
Image color analysis
imaging
Lighting
Monitoring
Monitors
Open source software
Pixel
Restoration
Source code
Surface treatment
Works of art
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Summary:This paper describes a simple and cheap solution specifically designed for monitoring the degradation of thin coatings employed for metal protection. The proposed solution employs a commercial photo camera and a frequency-domain-based approach that is capable of highlighting the surface uniformity changes due to initial corrosion. Even though the proposed solution is specifically designed to monitor the long-time performance of protective coatings employed for the restoration of silver artifacts, it can be successfully used also for assessing the conservation state of other ancient metallic works of art. The proposed solution is made tolerant to exposure changes by using a procedure for sensor nonlinearity identification and correction, does not require a precise lighting control, and employs only free open-source software, so that its overall cost is very low and can be used also by not specifically trained operators.
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2010.2090191