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da Silva, Simone 
  
4 PHOTOGRAMMETRIC RESTITUTION 
The photogrammetric restitution is defined as the obtaining process to graphic or numeric representation of a surface or 
a photographed object. The process is realized with oriented photos, from it are extracted the interest features. The 
restitution product is denominated of photogrammetric original, and it is obtained through stereo or mono-differential 
methods. This work presents the use of the mono-differential restitution for the architectural monuments representation. 
The digital mono-differential was accomplished with the *Monorestituidor Digital" system, which is associated with a 
PC based CAD-MicroStation system and its module for image processing IRAS-C. The restitution was performed 
according to the following steps: a) interior orientation; b) approximate space orientation; c) external orientation; d) 
vectorial digitising of the elements of interest and, finally, e) the transformation between the referential of the image 
space and referential object space and the adopted projection system. 
The photo-coordinates of the interest points in the restitution are determined through parameters that allow the 
correction of the systematic error in the photos. These parameters are determined during the orientation, which needs 
the knowledge of some parameters provided by the camera calibration certificate. 
The approximate space orientation models mathematically the relationship among the photogrammetric and 
topographical referentials. It needs the reading of photogrammetric points whose coordinates of the topographical 
referential are known. In this step are also verified the existence of gross error in the control points. The external 
orientation determines the rotation and translation parameters of each picture. 
The transformation between the image space referential and the object space referential has as purpose to rectify the file 
graphic. The vectorial digitising of the elements, together with its edition were made in the CAD-MicroStation system. 
5 CONCLUSIONS 
The progress of the computer science, allowing that a common user has access to computers with great storage capacity 
and high-speed of data processing, has making possible the use of several techniques not used until now, the mono- 
differential restitution, for example. 
For the presented photogrammetric recording, the mono-differential restitution have been shown useful, because the 
surface of the monument “Solar of Rosário" is approximately planes. In other surfaces, it is necessary more 
investigations to evaluate the final product as function on the photographed object shape. 
REFERENCES 
Andrade, J. B., 1998. Fotogrametria. SBEE, Curitiba, pp. 159-198. 
Atkinson, K. B., 1989. Instrumentation for non-topographic photogrammetry. In: Karara, H. M., Non-Topographic 
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Carbonell, M., 1989. Arquitectural photogrammetry. In: Karara, H. M., Non-Topographic photogrammetry. Falls 
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Mitishita. E. A. 1997. Monorestituiçäo digital de aerofotos, associada com sistema de computaçäo gráfica C.A.D., para 
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International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B5. Amsterdam 2000. 159