Dynamic photogrammetry

The operating principles of the digital photogrammetry system (DPS) described by Hofmann (1982 and 1985) and Hofmann et al. (1982 and 1984) are reviewed, and the effects of image errors, scanner parameters, and overflight characteristics on the quality of the resulting strip model are investigated by means of numerical simulations. DPS employs a stereo scanning camera with three lines of CCD sensors to produce three overlapping image strips in digital form for analysis (determination of homologous points by correlation and construction of a terrain model). The error analysis is presented in detail, and the results are given in graphs. The processes used in DPS are found to be relatively precise and stable, giving results comparable to those obtained by static series cameras and conventional interpretation methods.