UVVL dataset of Isis with sistro

Archaistic statue of Isis from the northeast corner of the portico of the Temple of Isis, in Pompeii (VIII - 7, 28). The goddess is depicted in an archaic style and likely dates to the Claudian period. Clear references to the Archaic Greek period can be seen, as the style of the representation echoes the posture of a kore. The hairstyle, held in place at the temples by an archaizing crown, is also a clear citation of that era. She wears a large necklace with geometric patterns and a dress of veils that clings to the body, revealing the breasts in their entirety. She holds her right hand raised, which probably once held a sistrum, while her left hand, resting along her side, supports an ankh, the quintessential symbol of the Goddess. A dedication found on the pillar connects the statue to Lucius Caecilius Faebus.

ultraviolet induced visible luminescence (UVVL) is a technique belonging to the MBI photographic techniques. This technique is based on characteristic responses of materials to ultraviolet (UV) radiation in the form of remitted luminescence in the visible range. The captured luminescence is used to assist in the general characterization or differentiation of materials such as pigments, coatings, binders, and adhesives and to identify the condition of an object (e.g. to detect restorations). 

A  Canon EOS 5D camera , Canon EFS 18-135mm, F/3.5-5.6 IS lens and a UV/IR cutting filter B+W 486 

Two Quantum T5D-R flashes, with the support of two QF80 Qflash UV/IR Wave Reflectors, provided with B+W 403 UV black filter. 

Each image is acquired in *.RAW format, which contains low-processed data to preserve entirely the information recorded by the image sensor. The image parameters are calibrated with fixed values already tested for this technique in the CHARISMA manual (see also Dyer, J., Verri, G., & Cupitt, J. (2013). 'Multispectral Imaging in Reflectance and Photo-induced Luminescence modes: a User Manual'. Web publication/site, European CHARISMA Project). 

The image acquired is elaborated with a graphics editor program, saved in jpg file and rendered in color image where each material can appear with a different luminescence more or less intense according to the amount and its degradation degree.

f 7.0, time 1/160 s, manual mode, neutral balance, ISO 400 

each material can appear with a different luminescence (e.g. pink for madder, yellow for oils, light green for resins) more or less intense according to the amount and the degradation degree.