The cross ratio of four points in the vanishing line is a projective invariant.
消失线上的四点交比是射影不变量，该不变量与各点所对应的直线夹角存在内在联系。
Both camera were set with the same fixed mode of optical center. Fourier-Mellin invariant descriptor and phase correlation technology were utilized to get projective matrix including rotation, translation and scale parameters. A seamless technology was used to smooth the discontinuous of the luminance transform.
两摄像机采用具有相同的光学中心固定方式；利用Fourier-Mellin不变描述子和相位相关技术，计算相邻图像序列之间的映射关系，包括旋转、平移和尺度变换参数；拼接中采用无缝缝合，实现对光照不连续的平滑过渡。
Another Method to Prove That the Plane Projective Transformation Has at Least One Fixed Point on an Invariant Line
二维射影变换中不变直线上至少有一不变点的另证
The invariant tensor under projective transformations of semi-symmetric metric-recurrent connections is obtained.
给出了半对称度量循环联络在射影变换下的不变张量。
The algorithm can adapt to object recognition, invariant not only under rotation? scaling? translation, but under affine and projective transformation.
算法不仅能适应目标物体在旋转、缩放、平移变换下的不变性识别.而且能适应仿射及射影变换下的不变性识别。
Description of Planar Line Relationship by Projective Invariant of Vanishing Points
利用消失点列的射影不变量描述平面直线关系
The experimental results show that the proposed structure has projective invariant which does not change with the variation of the viewpoints.
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。
A New Geometric Constrained Structure and Its Projective Invariant
一种新的几何约束结构及其射影不变量
A new geometric constrained structure with three planes and five lines and its projective invariant are proposed.
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。
Binocular Location Model of Digital Camera Based on Geometric Invariant under Projective Transformation
基于射影变换几何不变性的数码相机双目定位模型
In this paper, the author, using the resolution theory of projective modules, studies the important excision problem in algebraic K-theory by calculating the homological invariant Tor_m~A (Z, Z).
本文运用投射模的分解理论，通过计算同调不变量ToTm~（？）（Z，Z）来研究代数K&理论中非常重要的切除问题。