三維重構理論與技術是計算機視覺最重要的熱點問題之一，基于單幅圖像的三維重構
由于缺乏足夠的幾何信息而難以達到預期效果。本文針對大部分物體所具有的對稱性特征，提出利用假想對稱平面，基于透視逆變換原理，由人工交互指定已知三對對稱點的圖像坐標和空間坐標確定透視變換矩陣，繼而反求物體表面特征點的空間位置，再利用UG 軟件實現三維模型的重建。
關鍵字：對稱物體，視點位置，透視逆變換，反求3D 坐標
Inverse of 3D from Image Point Based On Projection Inverse Transformation YU Chang-hui, YU Yong-yan (Huaiyin Institute of Technology, Jiangsu Huaian 223003) Abstract: The theories and techniques of 3D Reconstruction are one of the most important problems in the computer vision, Single-image-based 3D Reconstruction because of lacking enough several informations but hard attain to expect the result. This paper aims at the symmetry characteristic of most objects, putting forward make use of to imagine the symmetry flat surface according to Projection Inverse Transformation principle, handing over from the artificial to specify with each other to have already known that three picture that rightnesses are a little bit symmetries sit the mark and spaces to sit to mark the Projection Inverse Transformation matrix, Inverse the 3D position that the object surface characteristic order, then make use of the software of UG to carry out 3D models.
Keywords: Symmetrical object，View position，Projection Inverse Transformation，Inverse of 3D