Segmenting engravings from ancient bronze mirrors


Contact: Simon Brenner

With over 3000 known examples, Etruscan mirrors form one of the largest object groups in Etruscan art. The majority are metal (mostly bronze) discs with handles whose polished obverse served as a mirror while the reverse was often embellished with engraved and/or chased figures. The old-fashioned way of documenting these figures is to draw them by hand. We want to increase the accuracy and objectivity of such drawings by automatically generating them from 3D scans.

Extraction of Drawings

Your job is to segment the engravings. This is challenging because the mirrors are often heavily corroded, such that the engravings are hard to separate from the background.

Input data are photometric stereo reconstructions, i.e. high-resolution surface normal and depth maps. Ground truth segmentations are available for a subset of mirrors.

From left to right: normal map, high-pass filtered depth map, segmentation ground truth.



  • Literature review
  • Implement and evaluate several segmentation approaches for the problem
  • Write a report or thesis