Validation of a photogrammetric approach for the objective study of early bowed instruments

Heritage Science

Table 4 Vertical distances [mm] between the CT mesh and various simplified photogrammetric meshes of the Cuypers sound board on a regular grid (linear interpolation). The original photogrammetric sound board without simplification contains about 490k vertices

Cuypers sound board	490k vertices	250k vertices	100k vertices	50k vertices
Maximum distance	1.94	1.94	1.94	1.93
Mean	0.091	0.091	0.091	0.091
Median	0.079	0.079	0.079	0.079
Standard deviation	0.074	0.074	0.074	0.074