Full text: Proceedings of the CIPA WG 6 International Workshop on Scanning for Cultural Heritage Recording

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a 3D crystal glass cube. Spatial forward intersection of 2 
infrared Laser beams, verified as Two-Step Upconversion, 
gains the Voxels. It is liked to emphasize, from a consequently 
dealing with the principals of Spatial data visualization, even 
the future of the whole computer industry might change, in 
order to replace or to complete the 2dimensional screen 
generation. 
2. METHODS FOR VIRTUAL SPATIAL 3D SCANNER 
DATA PRESENTATION 
According to the image definition, a Laser Scanner should 
fulfil both, Geometric as well as Radiometric requirements. 
This is basically illustrated in Figure 2 and 3, which, for 
archaeological objects in Patara, the antique capital of the 
province of Lycia (Turkey) show comparisons of the results of 
a Laser Scanner surveying (left image) with oblique 
photography of the same object (right image). This samples 
clearly indicate the lack of detail resolution due to the lack of 
Radiometric information for this particular Laser Scanner data, 
while the conventional photographs shows satisfactory detail 
resolution. 
Both samples demonstrate the necessity for a combination of 
Geometric and Radiometric Laser Scanner data. Neglecting this 
requirements shows results lacking detail resolution, which 
might even lead to a practical inability of particular Laser 
Scanner results. A combination of Geometric and Radiometric 
data obviously is necessary, as already verified for advanced 
Spatial Laser scanning technology. Beside simultaneous 
registration, corresponding Geometric and Radiometric data can 
also gained from suited spatial transformations of Radiometric 
image data into 3D Geometric Scanner data. 
Figure 2 shows the result of a 3D Laser Scanner surveying of the antique theatre in Patara (Turkey) (left image) in comparison with a 
stereo mate of an oblique photograph of the same object (right image). 
Figure 3 shows a comparison of the result of a Laser Scanner surveying of the antique main gate in Patara (Turkey) (left image) with 
the stereo mate of an oblique photograph of the same object (right image). 
In any case Spatial Scanner data can be looked at as Voxels, 
stored in a 3dimensinional raster data matrix, which is the 
database for different image transformations, in order to derive 
synthetic digital stereo mates, suited for conventional methods 
for virtual 3D data presentation and stereo viewing . 
To verify this, as usual, two images of the same object, gained 
from two different simulated viewing positions with at least 
approximately parallel look directions have to be processed. 
It shall clearly be stated, in principle the derived stereo mates 
can be of real or synthetic origin!
	        
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