To easily search a corresponding point whose rough altitude is known, to find a point where matching fails and to easily correct it by projecting a photographic image on a screen, searching a corresponding point from a photographed image and calculating the three-dimensional position of the corresponding point from the searched corresponding point.
Satellite images L210 and R220 are projected on a ground screen projection surface 102 and images L100 and R101 are determined on the surface 102. The (x) coordinate and the (y) coordinate of a photographic object in both images L100 and R101 projected at the point z=0 are equal, and as the z coordinate gets larger, (x) and (y) device from each other. That is, the parallax of corresponding points of both images L100 and R101 changes according to the size of the (z) coordinate of the photographic object and there is a proportional relation between the parallax and the size of the (z)coordinate. The corresponding point is determined from the images L100 and R101 on an epipolar rotational plane 104. The three-dimensional position in a ground surface coordinate system is determined from the coordinate of the corresponding point determined, the sensor position and the attitude at the time of photographing.
TAGUCHI JUNICHI
NOMOTO YASUE
