A study on analytical photogrammetry with use of non-metric camera

A methodology for orientation is developed which makes possible three-dimensional measurements with nonmetric cameras. The accuracy of the methodology is verified through several tests. In the orientation developed here, focus length, the shift of principal point, the coefficient of lens distortion, and the coefficient of film unflatness are treated as unknown variables. In the tests, the influence on accuracy of camera differences, unknown variables, base length, the enlarged ratio of film, and the type of digitizer are assessed. It is found that three-dimensional measurements with nonmetric cameras are possible within the standard criteria of accuracy in general photogrammetry.