Multipurpose, dual-mode imaging in the 3–5 µm range (MWIR) for artwork diagnostics: A systematic approach
| Autor: | Simone Parisotto, Claudia Daffara, Dario Ambrosini |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Computer science
02 engineering and technology Thermal quasi-reflectography Thermography Nondestructive testing Artwork diagnostics 01 natural sciences 010309 optics Artwork diagnostics Nondestructive testing Thermal quasi-reflectography Thermography Electronic Optical and Magnetic Materials Atomic and Molecular Physics and Optics Mechanical Engineering Electrical and Electronic Engineering Atomic and Molecular Physics 0103 physical sciences Emissivity Electronic Computer vision Optical and Magnetic Materials Artwork diagnostics Nondestructive examination Thermal quasi-reflectography Thermography Remote sensing business.industry Nondestructive analysis Dual mode 021001 nanoscience & nanotechnology Nondestructive examination Range (mathematics) Artificial intelligence and Optics 0210 nano-technology business |
| Popis: | We present a multi-purpose, dual-mode imaging method in the Mid-Wavelength Infrared (MWIR) range (from 3 µm to 5 µm) for a more efficient nondestructive analysis of artworks. Using a setup based on a MWIR thermal camera and multiple radiation sources, two radiometric image datasets are acquired in different acquisition modalities, the image in quasi-reflectance mode (TQR) and the thermal sequence in emission mode. Here, the advantages are: the complementarity of the information; the use of the quasi-reflectance map for calculating the emissivity map; the use of TQR map for a referentiation to the visible of the thermographic images. The concept of the method is presented, the practical feasibility is demonstrated through a custom imaging setup, the potentiality for the nondestructive analysis is shown on a notable application to cultural heritage. The method has been used as experimental tool in support of the restoration of the mural painting “Monocromo” by Leonardo da Vinci. Feedback from the operators and a comparison with some conventional diagnostic techniques is also given to underline the novelty and potentiality of the method. |
| Databáze: | OpenAIRE |
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