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IS-AUR-Samarb.progr. Norge Frankrike

Spectral and Polarization Imaging of Specular Cultural Heritage Artifacts

Awarded: NOK 0.10 mill.

The intensity of specular reflections makes it difficult to capture usable images of specular material. In art paintings or stained glasses, this is a major problem for documentation and analysis. We propose to update spectral and polarimetric imaging systems to spectropolarimetric imaging systems and demonstrate them on Cultural Heritage applications. Indeed, the two modalities, spectral and polarization, were considered separately in different scientific communities, and there is no imaging model that is accounting for both modalities at the same time. In addition, there are very few imaging systems that are both capturing spectral and polarimetric information. We propose to transform two existing imaging systems into spectro-polarimetric imaging systems. We will compare their performances, and apply the two techniques on Cultural Heritage related objects as a proof of concept. Scientific challenges are numerous, and we would address the imaging model that encompasses the two modalities, the creation of prototypes based on existing technologies, the calibration of those prototypes, and the experimental validation of them. This is possible within this framework thanks to the excellent adequation of the teams, their expertise and the accessibility to specific devices and material. Indeed, Pierre-Jean Lapray (UHA) and Foulonneau Alban (UHA) is an expert in polarimetric imaging, Sony George (NTNU) is specialized in using imaging systems on Cultural Heritage, and Jean-Baptiste Thomas (NTNU) is expert in spectral imaging and computational appearance. The proposed research will give networking opportunities for the PhD students (Federico Grillini- NTNU and Sumera Sattar - UHA) involved in this project and have a direct impact on their PhD research work. At NTNU, there are good facilities for spectral imaging, and UHA has good facilities for polarizations images. Both institutions have not yet collaborated, and there are several transfer of knowledge to be anticipated.

Funding scheme:

IS-AUR-Samarb.progr. Norge Frankrike