透视

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。

It's the constructiveness and creativeness residing in the internal criticism of art that guarantee the real truthfulness of art.

本雅明对艺术的具体打量，往往游移在犹太教、基督教以及马克思主义等多个相关视域之间，呈现出多重透视的特点。

Viewed from that perspective, the elevated expectations patients bring to the consulting room may be for the best.

从透视的角度看患者给咨询室带来的被高估的期望也许是最佳选择。

This is an untouched measuring way. The cameras are calibrated in the way of RAC two steps, first. With the polynomial interpolation, the pictures catched from the steel plate are treated to detect the edge in subpixel with a cross window arithmetic operators, which can fit non uniform illumination, keep the edge character and do filter in a better way. Three-dimensional scenery could be rebuilt from the two-dimensional pictures with the methods of least square fitting and contradictorily clairvoyance. Thus, the distance and its variance of two points in the given position of the plate can be achieved. It is expected that this study can provide a new and useful tool to the research on the theory of distortion of line heating.

这种非接触的测量方式，采用RAC两步法对摄像机进行标定，然后对采集到的钢板图像进行分析处理，通过多项式插值的方法，采用具有保持边缘特征和滤波功能，且能适应非均匀照明的十字窗图像边缘检测算子进行象素级边缘检测，再用最小二乘拟合法和逆透视法对二维图像进行三维重建，便可测出钢板上给定点的距离及其变化值，以期为水火弯板的变形机理研究提供一种新的检测手段。

It has a small teahouse social point of view, 50 years of Chinese history from three horizontal cut thin slices, on the stage throughout the convex lens.

它从一个小小茶馆的角度来看社会，把50年的中国史横向切出三块薄片，放在舞台的凸境下透视。

With the constraints of these feature points, perspective projection, coplanarity and colinearity, the curved surfaces can be recovered by minimizing the linearly constrained quadric objective function.

把特征点的位置、共面、共线、透视投影等作为约束，通过最小化线性约束下的二次目标函数实现曲面重建。

A nod to Dior's New Look peplum became a stiff patent hip-jutting belt with cross-lacing in the back, and a knowing acknowledgment of the basis of the hourglass silhouette came in a couple of see-through gowns with the corsetry fully on display.

一点头，以迪奥的新面貌peplum成为专利髋关节僵硬- jutting带跨lacing在后面，和明知承认的基础上沙漏人影来，在一对夫妇的透视袍与corsetry充分展示。

In this article,we conduct study on the rural female depicted in HeNan local novels civialian and geographically.Through their miserable ,virgin ,countrified living condition and tragic suffering,we can review the central culture and its effection on the rural female.

本文从民间地域角度，对河南乡土小说中的农村女性进行考察，通过农村女性"苦"、"古"、"土"的生存背景和现实生存遭际，来透视中原地域传统文化，及其对河南农村女性的规定和制约。

Firstly,"perspectivism"is an kind of method that study literature completely, dialectically and deeply, which become the start point of his critical theory and special visual angle to problems in literatures.

透视主义方法是一种整体、辩证、深刻的文学研究方法，是他批评理论的出发点和对待一切文学问题的独特视角。

Research on calibration of cameras based on cross ratio invariability ;2. Firstly,order radial lens distortion parameters are computed by using cross ratio invariability .

该方法利用透视投影的交比不变性原理标定镜头的畸变系数，基于摄像机成像的单应性矩阵及内部参数的基本约束，线性标定出其他摄像机参数。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。