Hyperspectral Imaging of In-Site Stained Glasses: Illumination Variation Compensation Using Two Perpendicular Scans

A novel method for compensating temporal illumination variations in whisk-broom hyperspectral imaging has been developed, addressing a key challenge in capturing stable images of cultural artifacts under natural sunlight. The approach incorporates multiple columns or a full-vertical scan alongside the standard horizontal scan, combined with logarithm space utilization and low-dimensional structure analysis of illumination and reflectance spectra. Experiments conducted on stained-glass windows at Amiens Cathedral demonstrated that this method effectively eliminates temporal illumination variations, significantly improving the accuracy of in-situ hyperspectral imaging for cultural heritage documentation.

Kessy, S. J., Funatomi, T., Kitano, K., Fujimura, Y., Caron, G., Mouaddib, E. M., & Mukaigawa, Y. (2023). Hyperspectral Imaging of In-Site Stained Glasses: Illumination Variation Compensation Using Two Perpendicular Scans. 2023 IEEE/CVF International Conference on Computer Vision Workshops (ICCVW), 1654–1662. https://doi.org/10.1109/iccvw60793.2023.00181