Validation of a photogrammetric approach for the study of ancient bowed instruments. (arXiv:2205.08745v1 [cs.CV])

Some ancient violins have been reduced throughout their history. We propose
an objective photogrammetric approach to differentiate between a reduced and an
unreduced instrument, where a three-dimensional mesh is studied geometrically
by examining 2D slices. First, we validate the accuracy of the photogrammetric
mesh by the way of a comparison with reference images obtained with medical
imaging. Then, we show how contour lines and channels of minima can be
automatically extracted from the photogrammetric meshes, allowing to
successfully highlight differences …

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