FARO Edge
September 2012
68
Chapter 4: Probes
column, due to angle of incidence, reflection, or any other external
interference, only clusters with at least 5 pixels will be considered COG
candidates. Pixels must also meet the Noise Threshold criteria, which is a
value of 2.
• Peak Threshold - For a COG group to be valid, one of the pixels must be
above this value. The default value is 50. Increasing the Peak Threshold is
useful with reflective surfaces that may shine or produce flares in the FARO
Laser Line Probe. If a FARO Laser Line Probe column captures more that
one laser light source, only the groups or clusters with at least one pixel at
Peak Threshold will be considered. Groups must also meet Noise Threshold
and Width Threshold criteria.
• Algorithm - Select an exposure setting:
• Automatic - Full: As you digitize, the Exposure setting automatically
adjusts to maintain the proper saturation level. This automatic mode uses
the entire exposure range of the FARO Laser Line Probe. In this mode,
you may notice a slight decrease in speed as the FARO Laser Line Probe
automatically adjusts from one surface type to another.
• Automatic - Highly Reflective: This is an automatic setting for use with
reflective, or shiny, materials. This automatic mode uses the lower half of
the exposure range of the FARO Laser Line Probe.
• Automatic - Normal: This is an automatic setting for use with non-
reflective, or dull, materials. This automatic mode uses the upper half of
the exposure range of the FARO Laser Line Probe.
• Fixed Exposure - The Exposure setting is constant.
N
OTE: The three Automatic settings disable the AUTO button and
ignore the Exposure and Noise Threshold sliders.
Choosing any of the three Automatic settings adds an exposure indicator to
the R
ANGE FINDER dialog box. In the RANGE FINDER dialog box:
• A green dot in the upper left-hand corner of the RANGE FINDER dialog
box indicates that the exposure has been adjusted and you are ready to
scan.
• The indicator changes to either a red “+” (plus)
or “-” (minus) sign indicating that the FARO Laser Line Probe is either
over-exposed or under-exposed, and it is automatically adjusting the
exposure. The FARO Laser Line Probe does not collect data during this
adjustment, however this automatic adjustment process is very fast.
For more information, see “Range Finder” on page 59.
08M52E00_FaroArm_Edge.book Page 68 Thursday, October 4, 2012 9:31 AM
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