Hexagon Metrology HP-L-20.8, User Manual

Page: 18 / 29

HP-L-20.8 Scanner Manual V1.0.3
(27/11/2014)
18

Quality filter
The sensor has a quality filter to remove points which are deemed to be low quality, including:
- Double reflections
- Poor quality data on edges
- Isolated points/outliers
When measuring dark, glossy or translucent surfaces, in the event it is still difficult to capture data
with gain set to High or Very High, you can also disable the quality filter at the cost of overall reduced
data quality.
The metrological performance of the system is not guaranteed when this filter is
disabled since low quality data may be generated.

Sampling filter
To improve the performance and speed of digitizing (depending on the performance of the computer
and the final software), it is possible to reduce the number of digitized points by skipping a regular
percentage of points, points by points or line by line.
Item Description
Point sampling
None =keep all the points (100 %)
80 % = keep 4 points on 5
60 % = keep 3 points on 5
40 % = keep 2 points on 5
20 % = keep 1 point on 5
10 % = keep 1 point on 10
5 % = keep 1 point on 20
2.5 %= keep 1 Point on 40
Etc.
…
Line sampling
None = keep all the lines
1/2 = keep 1 line on 2 (50% remain)
1/3 = keep 1 line on 3 (33% remain)
Etc…