User guide
4 Getting Started
Resolution Quality Speed
(kpt/sec)
Noise
compression
Net scan time
(full scan)
pt/360° NOHD [m]
Mio. Pts
(full scan)
axial radial
1.8 1/20 8x 122 4x 0:04:35 2,048 10.60 3.30
0.7 1/32 4x 122 — 0:00:07 1,280 2.70 0.10
0.7 1/32 6x 122 2x 0:00:27 1,280 4.50 0.90
0.7 1/32 8x 122 4x 0:01:47 1,280 7.50 2.10
Enhancing the scanning environment with artificial targets
Before scanning, you should make sure that there will be enough reference objects in the scans so
that there will be no problems during the later registration process. References, or targets, are used
to register multiple individual scans that are each on their own coordinate system, onto a single,
aligned coordinate system. Although scan registration using TX5 SCENE software can be done purely
on the basis of natural targets, such as planes, walls, corners etc., we recommend to enhance the
scanned environment with additional artificial reference objects, like spheres or checkerboard paper
targets. Spheres and paper targets can be combined within a scan site. Usually you will achieve
more precise registration results when you have manually placed such targets.
The following tips and hints provide an overview of basic principles which should be obeyed when
working with artificial reference objects like spheres or paper targets.
General
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Mathematically you need three corresponding references in the two scans which you like to
register to each other. The inclination data captured by the built-in dual axis compensator may
serve well as one reference, such that only 2 other scanner external references are required. But
a higher number of references per scan may improve the registration results and may make
registration easier and less error prone.
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As artificial targets you should use checkerboard targets or reference spheres.
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Use targets with a non-reflecting surface.
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Print paper references with laser printers only.
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The references should be easily and clearly visible in the scans.
Trimble TX5 3D Laser Scanner User Guide 53