Abstract
Three-dimensional CAD and CG, which make use of advanced computer technology, has lately attracted considerable attention. Also attracting attention is photogrammetric technology to acquire three-dimensional coordinate data from two-dimensional image data recorded by digital cameras. Photographing and the determination of measuring points are more difficult even for experts in ground photogrammetry, for which the demand is increasing, as compared with the same tasks in aerial photogrammetry which is used for the preparation of maps and so on. Accordingly it takes enormous labor and time to obtain accurate three-dimensional coordinate data by ground photogrammetry and, therefore, it has hardly been put to practical use yet. Under the circumstances, the object of the present study was to develop a system which enables us, without requiring expensive apparatuses or expertise, to create 3D model spaces easily and quickly just by taking two-dimensional digital photographs.
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