VIL 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.

Visible induced luminescence (VIL) is a technique belonging to the MBI photographic techniques. The object is irradiated with a source of radiation that does not include the infrared spectral band. At the same time, the modified camera with a dedicated filter collects the infrared luminescence of selected pigments, such as Egyptian blue.  

A modified Canon EOS 400D camera without the internal ICF/AA filter, Canon EFS 18-135mm, F/3.5-5.6 IS lens and a IR bandpass filter B+W 093 IR 

Two Quantum T5D-R flashes, with the support of two QF80 Qflash UV/IR Wave Reflectors, provided with B+W 468 UV/IR cut 

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 a ColorChecker and a self-build target with Egyptian blue. 

The image acquired is elaborated with a graphics editor program, saved in jpg file and rendered in black and white image where Egyptian blue appears like spots with high luminosity. 

f 9.0, time 1/200 s, manual mode, neutral balance, ISO 200 

Egyptian blue glowing white if present