| 摘要 |
<p>An information extraction device including a coordinate transformation unit for transforming the coordinate values of points on the plane in question to coordinate values of the points on a spherical surface corresponding to the points on the plane in quetion, and a mapping unit for mapping the points on the spherical surface to great circles. This information extraction device is applicable to the detection of the three-dimensional direction of a single line or a single plane existing in space.</p> |
