Intangible Cultural Heritage High-Definition Digital Mobile Display Technology Based on VR Virtual Visualization

Table 4

Point cloud data classification.

Scanning device	Ordered point cloud	Arrange at a constant density in the direction of rows and columns
	Disordered point cloud	Indefinite density exists anywhere in space
Scan quality	Miscellaneous	Miscellaneous points are points that are measured incorrectly and are invalid points; after zooming in, you can see that they are clearly separated from the surface of the part and exist in isolation
	Noise point	Because of the reverse equipment and measurement method, there are systematic and random errors in the measurement data; some of the measurement points have relatively large errors that exceed our allowable range; this is the noise point
Generated during operation	Redundant point	It is because of the problems of flattening, measuring angle, etc., that overlap redundant points