5. CONCLUSIONS AND FUTURE WORK 
We presented an approach to construct photorealistic 3D models 
of real-world objects. The system requirements are simple 
therefore the method is attractive for many applications. A 
bundle block adjustment was performed prior to volume 
intersection and refined by an image matching algorithm. In 
order to achieve good results for the image orientations, control 
points and spatially well distributed tie points are measured 
carefully. 
The calculation of the visual hull is simple and fast and gives a 
good approximation of the object. The ray tracing is slow, 
therefore further investigations should be done for speed 
optimization. Although the combination with the color image 
matching to get into the concavities gives good results for 
textured regions of the object, it is not reliable for non-textured 
regions. In the future, we would like to check the current 
algorithms for further automation, for example the automatic 
measurement of tie points and the elimination of errors in the 
adjustment process. 
ACKNOWLEDGEMENTS 
The author would like to thank O. Sinram and V. Rodehorst for 
their contributions, J. Moré and A. Wiedemann for their helpful 
assistance to the camera calibration and bundle block 
adjustment task. 
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