| 摘要 |
PROBLEM TO BE SOLVED: To compute the coordinates of survey points using image data of photographs, with high accuracy. SOLUTION: This photogrammetry is provided with a first step, a second step, and a third step. In the first step, photographing is performed by a camera from different observation points, in such a way as to include both an object to be surveyed and reference angles to be used, when survey computations on the object to be surveyed are performed to acquire at least two different images. In the second step, both angle reference points for specifying the attitude of the camera at survey points and the observation points and reference angle specifying points for specifying the reference angles, which are common to both images, are set on the object to be surveyed to compute two-dimensional coordinates of the angle reference points and the reference angle specifying points in the images. In the third step, a three-dimensional coordinate system including the object to be surveyed is set. On the basis of the two-dimensional coordinates of the angle reference points and of the reference angle specifying points and the reference angles, three-dimensional coordinates of the survey points are computed. COPYRIGHT: (C)2005,JPO&NCIPI
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