Heft 5

Schriftenreihe des Studiengangs Geodäsie und Geoinformation
der Universität der Bundeswehr München



  • Contents
  • Abstract
  • Order



Heft 5

Accuracy Improvement in Close Range Photogrammetry

Author: K. Torlegård

Hochschule der Bundeswehr München, Neubiberg, 1981
68 Seiten










Mathematical Model

  • The Bundle Approach
  • Convergence Criteria for Iterations
  • Lens Distortion and Additional Parameters
  • Accuracy of Control Points
  • Interpretation of Results

Measures of Precision, Fidelity and Reliability

  • Terminology
  • Definitions
  • Experimental Design

Blunders in Photogrammetric Data

  • Blunders in Adjustment
  • A Suggested Test Statistic Fmax
  • The Qvv-Matrix
  • Distribution Function of Fmax
  • Blunder Localization

Stochastic Properties of Image Coordinates

  • True Errors and Residuals
  • Empirical Studies
  • Cartesian or Spherical and Cylindrical Coordinates

The Multi-Concept in Close Range Photogrammetry

  • High Accuracy Procedures
  • Multi-Readings
  • Multi-Fiducials
  • Multi-Targets
  • Multi-Frames
  • Multi-Stations
  • Multi-Control
  • Multi-Purpose Programm









The state of art in highly accurate analytical photogrammetry is briefly overviewed. The concept of accuracy is described as precision, model fidelity, and reliability, where precision is related to random errors and their propagation, model fidelity to systematic discrepancies between reality and mathematical model, and reliability to detection, localization and elimination of blunders. The effect of blunders in least squares adjustments is outlined, and a procedure in order to localize blunders in all phases of the photogrammetric process is discussed in detail, particularly is demonstrated, laeding to the multi-concept in photogrammetry. It can be applied to all steps: coordinate readings, fiducial marks, targets, frames (new method of overlapping), stations, control points, object geometry, computer program options. Simultaneous adjustment of observations, of image coordinates, observations of exterior orientation elements, geometric conditions in object space, and approximations for the unknowns are reviewed. Several hitherto unsolved problems and open questions have been stated.