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International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B5. Istanbul 2004 
  
DTM of small detail with poor texture on the surface. 
However the strict conditions of the photogrammetric 
measurement has to be preserved. 
  
Fig. 3.2 Three dimensional surface model of the archeological 
detail. 
The second experiment deals with applying the computer aided 
moire fringe analysis for measuring the 3D metric values of the 
spinal deformities. The system which had been developed 
within the few years research project in the Department of 
Photogrammetry, Warsaw University of Technology has been 
already commonly implemented for orthopedical diagnosis 
(Zawieska, 2000). The object shape information is encoded in 
moire fringe, which provides lines on the object. The temporal 
phase stepping approach has been used for automatic analysis of 
moire patterns. It has been found that the phase measuring 
approaches proved advantages over the intensity tracking such 
as the reduced sensitivity to the background and contrast 
variations in the moire pattern. Within the doctoral thesis 
(Zawieska, 2003) the accuracy analysis and examination of the 
elements affecting on precision of such measurement were 
done. For this purpose the simulated object - dummy (shape of 
human back) was designed with the control points located 
around and on the object. The 3D surface of the object was 
determined twice, using the conventional photogrammetric 
method (based on the optical metric photographs and the 
analytical compilation with the analytical plotter P3) and with 
the use of the projection moire system (fig 3.3). 
  
Fig. 3.3 The projection moire system [Zawieska, 2003] 
To enable the measurement of the 3D surface of the object by 
the conventional photogrammetric method the object was 
premarked with the light projecting points. The photo of the 
object with the control points is presented in figure 3.4 and the 
visualized digital surface model of the measured object is 
shown in fig. 3.5. 
  
Fig.3.5 The DSM ofthe object reconstructed by the 
conventional photogrammetric method. 
The shape of the object which was reconstructed by the moire 
fringe method with the use of the projection moire system is 
shown in figure 3.6. The results were corrected with the 
systematic errors of the system. The distribution of the 
differences in the shape of the object determined by both of the