射影不变量

利用消失点列的射影不变量描述平面直线关系

Description of Planar Line Relationship by Projective Invariant of Vanishing Points

一种新的几何约束结构及其射影不变量

A New Geometric Constrained Structure and Its Projective Invariant

一组用于识别平面多边形的射影不变量

A group of projective invariants for recognition of Planar Polygons

基于射影不变量的车牌字符识别

Recognition of License Plate Characters Based on Projective Invariant

图像中射影不变量在目标识别中的应用

Application of Projective Invariants in Object Recognition

但理论研究表明，只有特定的几何约束结构，才具有射影不变量。

However , researches show that only some special geometric constrained structures possess projective invariants .

共面五条直线的联合射影不变量

Joint Projective Invariants for Five Coplanar Lines

文中提出了利用射影不变量来求解基于图像对三维深度恢复问题。

A new projective invariant-based technique for recovering depth information from stereo images is presented .

几何不变量，特别是射影不变量，是基于单视点灰度图像识别三维物体的一条有效途径。

Geometric invariant is an effective tool in recognizing 3D object from a single gray image .

因为作为射影不变量，特征数反映曲线的内蕴性质。

Characteristic number is a intrinsic nature of the curve , and it is projective invariant .

该文提出了一种新的由相邻3平面上5条直线组成的几何约束结构及其所具有的射影不变量。

A new geometric constrained structure with three planes and five lines and its projective invariant are proposed .

自标定技术则不需要标定物，利用射影不变量和极几何约束对相机进行标定，在实际应用中灵活。

The self-calibration technology needs no calibration object and its work is based on projective geometry and the constraints of epipolar geometry .

实验验证了文中提出的几何约束结构具有不随物体成像视点改变的射影不变量。

The experimental results show that the proposed structure has projective invariant which does not change with the variation of the viewpoints .

该方法利用物体的三维形态和物体中具有射影不变量的几何约束结构来构造哈希表。

In which , 3D aspects of object and geometric constrained structures possessing projective invariant are used to construct the hash table .

利用共面五点的交比，导出一组用于识别平面多边形的射影不变量，用这组不变量实现平面多边形的识别，实验结果表明，这组不变量具有射影不变性，可以有效地识别平面多边形。

A group of projective invariants was derived based on the cross ratio of five coplanar points , and used to recognize planar polygons . Experimental results show that the invariants have projective invariance and can be used to recognize planar polygons effectively .

根据射影几何学中几何不变量的相关理论，本文利用共面五点交比不变特性实现平面非编码标记点的匹配。

Based on the theory in projective geometry geometric invariants , by which the non-coding marker point-plane matching can be realized .

本文深入分析了平面目标的仿射不变特征和射影不变特征，研究了一种新的基于射影不变量的平面目标识别方法，并进行了仿真实验和性能分析。

This thesis analyzed thoroughly the affine invariant features and the projective invariant features of planar objects and a novel method based on the projective invariants was deeply studied . Simulation experiments and performance analysis are both given .