PURPOSE: To enhance business efficiency by inputting the image information of the scenery, which is photographed on the preset conditions including reference dimensions, and forming the three-dimensional coordinates of the scenery based on the information. ;CONSTITUTION: Electronic image-record information 5 of photographs, video images and the like, which are picked up on the preset conditions, is taken into a personal computer 1. The focal length of a lens, the ground height of a camera screen and a pitch angle are inputted as known data. An observing point is set at the original point of a world coordinates. A line of sight vector, wherein the noting point is set in the direction of Z (front and rear) = -∞, is set. At the same time, the X (right and left) axis is rotated and processed by a pitch angle, and the Y (up and down) axis is moved in parallel a required height. Thus, the visual-field replacing matrix is obtained. The screen coordinates are converted into the world coordinates based on the matrix and the focal length of the lens. The value of the Z axis is retrieved at a large step before the observing point and at a small step when the observing point approaches. Thus, the design of fences, gates, landscape architectures and the like can be performed in the office, and the business operation becomes efficient.;COPYRIGHT: (C)1996,JPO
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