This paper describes some approaches towards an automation in architectural 
photogrammetry using digital image processing. We present techniques for semi-
automatic 3D measurement and the application of digital image analysis to 
support the extraction of facade primitives. The proposed semi-automatic 3D 
measurement is used for the determination of tie points for the orientation and 
the interactive restitution process. The use of digital image analysis in 
architectural photogrammetry allows the automation of various low-level tasks. 
Exemplary, we introduce some approaches for a computer assisted generation of a 
facade map from gray-level photographs. Some results for the mapping of joint 
contours, i.e. for irregular stones, are presented.