CI PA 2003 XIX th International Symposium, 30 September-04 October, 2003, Antalya, Turkey
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CCD 1
Figure 2. Theodolite and CCD camera
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la^ pr
Figure 3. Principe of rotating platform
Figure 4. Principe of two cameras
3. TWO CAMERAS AND STRUCTURED LIGHT
SOURCE
This device uses the principle of an image - the correlation. The
image projector sends the structured light on the object and the
object is recorded by using of two CCD cameras from a known
basis. This system can by combined with rotating platform for
complete documentation of object (0-360deg). Every image pair
must be post-processed by using image con-elation for 3D co
ordinates of object points determination.
4. LASER SCANNER HEAD SICK
In autumn 2002 a small inexpensive laser 3D scanner based on
“time of flight” was developed. The laser head SICK is the
main part of 3D scanner. There are two possibilities for its use:
the first one as a linear laser scanner (on Fig. 3) and the second
one as a rotating head (Fig.4). In the linear scheme the SICK
head was used as a 3D scanner for sculpture documentation, but
the resolution on about 50cm was not very high (it is a good
idea for more precision scanners). Next, the head was
completed with a motorised PC- controlled rotating part with
incremental device for angle measurement. It is a ’’classical”
laser scanner scheme. All the control software was made at the
CTU Prague and it will be used as a “school laser scanner”.
Figure 5. Linear scanner Sick
