Hyperspectral Imaging (HSI)
Like multispectral imaging (MSI), hyperspectral imaging (HSI) captures multiple images of an object under different wavelengths of light. However, HSI captures information in upwards of 80 wavelengths and generates precise reflectance curves that can identify pigments and classes of inks. The primary application of HSI is combining photographic image capture and identification of materials used across an object. Unlike XRF, which only collects data from small sample regions selected by the researcher (see X-ray emission spectrometry), HSI produces a kind of spectral map for the entire object. HSI is especially useful to researchers working on paintings and illuminated manuscripts, where a large variety of pigments are used. The UWA/CSMC intends to acquire an HSI system in 2025.