Table 2 Applied filters
From: Use of 3D models as a didactic resource in archaeology. A case study analysis
Filter | Definition | |
|---|---|---|
Dark Scan Point | It removes points based on a reflectance valuve It is used to remove scan points with too much noise | Reflectance threshold 200 |
Distance | It removes all scan points which are outside of a certain distance range | Maximum distance: 30 m |
Stray Point | It checks if the 2D grid cell of a scan point contains a sufficient percentage of points with a distance similar to the scan point itself | Grid size: 3px Distance threshold: 0.02 m Allocation threshold 50% |
Edge Artifact | It is especially useful to remove artefacts at the edges of obejects | Yes |
Smooth | It is used to minimize noise on surfaces | No |