The term "distortion" is precisely defined as the symmetrical dislocation of image points between the mathematical model of perspective projection and the physical image formation model. On this physical distortion, which is always rotation-symmetrical, is superposed a summation of unavoidable tolerances in the manufacture of optical systems, for which the term "deformation" is introduced. Further considerations deal with external influences on photogrammetric photography and lead to the conclusion that at the present state of knowledge no definite causes can be established for image point dislocations in photographic image formation. Based on the assumption that model deformations are caused by imperfections of the photograph's geometry, it is advantageous to compensate those imperfections by correction surfaces generated analytically or by analogue instrumental techniques from discrepancies at known control points. Conventional solutions using optical compensation plates or reseau cameras are criticized.

  • Corporate Authors:

    American Society of Photogrammetry

    105 North Virginia Avenue
    Falls Church, VA  United States  22046
  • Authors:
    • Scholer, H
  • Publication Date: 1975-6

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00098441
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 30 1975 12:00AM