| 摘要 |
PURPOSE:To enable rapid and highly accurate measurement of a camera position, by solving simultaneous equations without a singular point by repeated calculations from positions of known three points in the space and from those on a photographed image on a film surface. CONSTITUTION:Position input unit 1-1 introducing co-ordinates of known three points in a space in an object, position input unit 1-2 of an image-introducing co-ordinates of three points on a photographed film of three known points in the space, and focal length input unit 1-3 introducing the focal length of a camera are contained in an input unit 1. A calculating unit 2 of lengths of sides of a triangle calculates the side lengths from the co-ordinates of the known three point informed. An optic angle calculating unit 3 calculates angles formed between co-ordinates of an image on a film surface and the center of a lens from the co-ordinates of an image on the informed film surface and the focal length of the lens. Next, initial value setting unit 4-1 of an edge length, solution- renewing unit 4-2 and identifying unit 4-3 execute the Newton method and when the unit 4-3 made identification as having the specified accuracy, it notifies the value of the solution to a position calculating unit 5.
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