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AN INVESTIGATION OF THE ACCURACY OF PARALLAX BAR HEIGHTING BY MEANS OF NUMERICAL SIMULATION
Author(s) -
Ng K. W.,
Walker A. S.
Publication year - 1987
Publication title -
the photogrammetric record
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.638
H-Index - 51
eISSN - 1477-9730
pISSN - 0031-868X
DOI - 10.1111/j.1477-9730.1987.tb00578.x
Subject(s) - parallax , bar (unit) , process (computing) , computer science , sample (material) , computer simulation , surface (topology) , mathematics , computer vision , simulation , geometry , physics , meteorology , thermodynamics , operating system
Previous assessments of the accuracy of parallax bar heighting were handicapped by small sample sizes. Numerical simulation was avoided due to the difficulty of obtaining co‐ordinates for the conjugate principal points. This problem has been overcome, however, and all required photograph coordinates have been rigorously computed following the generation of fictitious data for ground points and exposure stations. The parallax bar heighting process has additionally been simulated in order to investigate both external factors, such as image errors, tilts and ground relief, and also influences intrinsic in the heighting process, for example estimation of flying height, baselining, control configuration and error surface model.