SV CYCLOP: A New Instrument for Close-Range Photogrammetry 
745 
SVCYCLOP, using an electronic sheet, allows the simply registration of the coordinates of the points, distances, areas and volumes 
selected on the stereo-model for direct use of the system and a traditional plotting of the object by means of lines, polylines and 
points (see fig. 11). 
This last operation can be directly performed in CAD environment where the photogrammetric plotting is interpreted as a 3D digiti 
sation of a solid (see fig. 12) 
SVCYCLOP also allows the computation of the parameters of an Helmert transformation (see fig. 14) between the CYCLOP refer 
ence system and a user reference system. This procedure require the collimation of three points of known coordinates on the model 
and the introduction of the new coordinates of the selected points. In this way it is possible to change the scale of the model, when (p 
rotation are not negligible, rotate the [XY] plane in vertical position, when to inclination was used or connecting the active model to a 
previous one, when the object cannot be completely surveyed with a single model (obviously, in this cases, two subsequent stereo 
models should have an appropriate overlapping zone). 
Finally SVCYCLOP can manage many models in a multi-windows screen: this opportunity allows one to compare models of the 
same object acquired in different epochs or display all the models of a big object (see fig. 15). 
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Fig. 11 : SVCYCLOP - Recording of coordinates 
Fig. 12: SVCYCLOP - Recording of geometric entities 
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Fig. 13: SVCYCLOP - Monoscopic window with “stereofocusing’ 
The operator collimates at least three 
points on the first stereo-model in the 
overlapping part of the two subsequent 
stereo-models. Opening the second 
stereo-model, the operator collimates 
the same points and the software 
automatically computes the parameters 
of the 3D rotation that transforms the 
point coordinates surveyed in the sec 
ond stereo-model into the first refer 
ence system. The point coordinates of 
the second stereo-model are only ana 
lytically transformed: the stereoscopic 
vision and the matching procedures 
run in the original reference system of 
the used stereo-model. SVCYCLOP 
(in the monoscopic solution) can run 
using a standard laptop PC, thanks to 
the limited hardware requirements of 
the monoscopic procedure. This fact 
allows the operator to make all the 
required measurements “in situ”. The 
stereoscopic solution requires graphic 
cards and a video like those usually 
adopted in standard desktop PC.