透视平面

Organization of Chinese brush Act program called "words" and "cross-eye", composition of "white cloth","interspersed","inter-frame","may be cursory sparse, dense impenetrable needle", a far-reaching law the "scatter perspective," and so on, all with varying degrees of awareness of print concepts.

中国画笔法组织程式中所谓"个字点"、"交风眼"、，构图中的"布白"、"穿插"、"间架"、"疏可走马，密不透针"，深远法中的"散点透视"等等，均不同程度的含有平面观念的意识。

Chapter 1 briefs the relation between invariance and computer vision and summarizes the research and application of invariance in computer vision. Chapter 2 first derives the transformations of three camera models, then makes the correpondences between the models and three typical geometrical transformation groups by analysing the transformations respectively. The correspondences supply the theoretical basis for applying geometrical invariants to resolve the problems of computer vision. In Chapter 3, we describe the geometrical invariant theory and prove some geometrical invariants of coplanar points, lines or conics by algebraic method. In order to use the invariants of conic pairs to describe general 2D shapes, we discuss the perspectively invariant representation of planar curves using conies in detail. A system consisted of two TMS320C25 and based on moment invariants is introduced in Chapter 5. The system can recognize more than 30 different shapes of object model or more than 10 plane models with similar shape in real time.

第一章简述了不变性与计算机视觉的关系，以及计算机视觉中的不变性研究和应用概况；第二章推导了计算机视觉中常用三种投影模型的变换关系，通过对这三种变换关系的分析，分别建立了这三种投影模型和几何学中的三种变换群之间的一一对应关系，为几何不变性在计算机视觉中的应用提供了理论基础；在第三章中，我们介绍了几何不变性的理论，并且用代数方法证明了共面点、直线、二次曲线的几何不变量和射影不变量；为了把二次曲线的不变量用于一般二维形状描述，在第四章中我们详细地讨论了用二次曲线实现一般平面曲线的透视不变性表示的方法；第五章介绍了用两片TMS320C25构成的、基于不变矩形特征的运动目标实时识别系统。

The intersection point S between this line and the plane is the perspective projection of that point.

这条直线与平面的交点S就是点P的透视投影。

They are exposure, refraction, plane of focus, angle of view and aperture.

他们曝光，折射，平面透视视角和孔径。

Based on the model of linearcamera in the stereovision and the character of wandering in the virtual scene, this method can get a projection matrix by thecorrespondence of four points between image space and texture plane.

该方法以立体视觉中的线性摄像机模型为基础，针对虚拟场景漫游的特点及需要，利用透视投影中点的对应关系，通过图像空间与纹理平面上的四点对应，求得纹理校正的投影矩阵。

A parametric study graphic nature of the projection, that is, they read the projective transformation, remained the same graphic nature of the geometry, the branches. 2D projective transformation is a more common transform method, used in the camera lens of the camera plane, and applied to various fields of study.

射影几何是研究图形的射影性质，即它们经过射影变换后，依然保持不变的图形性质的几何学分支学科。2D射影变换是一种较为常见的变换方法，发生在用透视摄像机对平面摄像的时候，并应用于各个研究领域。

Syd goes through the process of defining proportion, the horizon line, the vanishing point, perspective and the ground plane, resulting in a series of sketches ready for further development.

他通过选择相应的摄像机角度来导航视图，并确定图像的几何特性。Syd还演示了定义比例、地平线、消失点、透视和地平面，这些技术在以后都非常有用。

The knowledge of vanishing point is an important step for oncoming camera self-calibration and 3D reconstruction. Under perspective projection, lines paralleling each other in space will converge to a point called the vanishing point in the image plane.

在人造建筑物的图像中，存在着许多空间上相互平行的直线，这些直线经过透视投影后将在成像平面上相交于一点，称为消隐点。

For example, Site Sections and Images 1, Master Plan 2, Axonometric and Sketches 3, Construction and Infrastructure Details 4

比如：场地剖面和意向1，主要平面2，透视？？3，施工和设施细部4

If the feet do not touch the ground plane the model will have the effect of "walking on air".

如果脚不接触透视地平面，模型将有&洋洋得意&的影响。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。