Table 5 Vertical distances [mm] between the original photogrammetric mesh (about 490k vertices) and three simplified photogrammetric meshes of the Cuypers sound board on a regular grid (linear interpolation)
From: Validation of a photogrammetric approach for the objective study of early bowed instruments
Cuypers sound board | 250k vertices | 100k vertices | 50k vertices |
|---|---|---|---|
Maximum distance | \(8.9 \cdot 10^{-2}\) | \(3.1 \cdot 10^{-1}\) | \(1.6 \cdot 10^{-0}\) |
Mean | \(1.3 \cdot 10^{-3}\) | \(3.9 \cdot 10^{-3}\) | \(6.6 \cdot 10^{-3}\) |
Median | \(7.6 \cdot 10^{-4}\) | \(2.8 \cdot 10^{-3}\) | \(4.9 \cdot 10^{-3}\) |
Standard deviation | \(1.7 \cdot 10^{-3}\) | \(4.5 \cdot 10^{-3}\) | \(1.1 \cdot 10^{-1}\) |