Numerical Controllers for Analytical Stereo Processing

Precision positional controllers are an essential part of certain photogrammetric instruments of which the most universal and accurate is the Analytical Stereorestitutor. After a review of the concept of this instrument, the controller design for it is discussed. An aim is to free the machine computer to circulate real-time photogrammetric programs as rapidly as possible. Simple controllers which have their own scaling and nonlinear functions are also described for use on peripheral photogrammetric devices.