ステレオ写真による3次元計測の期待精度

摘要

左右のカメラの光軸が同一平面上に存在するというrn撮影条件下での3次元計測の期待精度を表す式を，誤rn差伝播の法則をあてはめることにより，理論的に求めrnることができた。そして，求められた3次元計測精度rnが点の空間座標に依存するものであることが確認されrnた。%This paper discusses the expected accuracy of the 3D measurement by using a pair of convergent stereo photographs. The only assumption in the discussion is that the optical axes of both the left and right cameras lie on the same plane. The theoretical accuracy of the object-space coordinates of a point is obtained from the measurement accuracy of a point position on a photograph by using the rules of error propagation. The general formulas expressing the root mean square error of the object-space coordinates of a point include the object-space coordinates of the point. The approximate formulas for the normal case and convergent stereo photographs shown in some literatures on photogrammetry are derived from the obtained general formulas.