Digital restoration

Cutting-edge imaging techniques are being used in the digital restoration of a 2,000-year-old Roman statue.

The delicately painted statue, which was discovered in the ancient ruins of Herculaneum in 2006 and is believed to depict an Amazon warrior, is now the subject of a joint restoration project by Southampton University, Warwick University, and the Herculaneum Conservation Project.

Highly sophisticated digital imaging is vital for the recording, subsequent analysis and restoration of cultural heritage material. Experts in archaeological computing, led by Dr Graeme Earl of the Archaeological Computing Research Group at Southampton's School of Humanities, used a novel form of photography – Polynomial Texture Mapping (PTM), developed by HP Labs – to provide a detailed record of the texture and colour of the painted surfaces.

A specially designed rig, camera structure, and associated custom software was developed in Southampton's School of Electronics and Computer Science by Dr Kirk Martinez and the team in the mechanical workshop to enable very fast acquisition of PTM data, with variable sample sizes.