查询词典 vanishing point

The artery in the edge of lens capsule equator department started atresia and vanishing at the 30th week, and vanishing complete at the end of the 32nd week in some specimens. Up to the 33rd week, two group artery of different origin were complete atresia and vanishing, were remaining the transparent vitreous body frenum.

胎儿自第30周始，部分标本在晶体囊赤道部边缘的动脉已开始闭锁消失，第32周以后完全消失，至第33周两组不同来源的动脉已全部闭锁消失，残留着透明的玻璃体系带。

There is a variety of vanishing cream, according to the difference of its structure, properties and usage, it can roughly be divided into alkalescence, subacidity powder vanishing cream as well as drug and nutrient vanishing cream.

雪花膏品种繁多，按其膏体结构、性能和用途不同，大体可分为微碱性、微酸性粉质雪花膏及药物性和营养性雪花膏四类。

The special geometric restrictions like parallelism andperpendicularity implicated in vanishing elements are deeply studied. In single-view case,the theory is presented to interpret relationship between two planar lines by applying 3Dinvariants of vanishing points. In two-view case, the method on extraction vanishing pointof an arbitrary spatial line is described, and moreover, the theory is presented to interpretrelationship between two elements in 3D space, such as two lines, two planes, line andplane, and so on.

4详细论述了消失元素(消失点、消失直线、消失平面等)所体现的垂直、平行等特殊几何约束关系；对单视图，提出了一种利用消失点列的3D不变量解释平面直线关系的方法；对双视图，提出了利用自共轭三角形和对极几何约束，提取任意直线的消失点的算法，并在此基础了提出了一种利用消失元素的3D不变量解释直线间、直线与平面间、平面间等多种空间几何关系的方法。

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。

In Single Point Perspective,the designer can also determinate Vanishing Point anywhere on the horizon with the need of design's expression effect.Determining Vanishing Points on the horizon in two-Point Perspective,designer draws one of Measurings with the need of design's expression effect.The another can be draw by two circular arcs in the vertical.It solute the problem easy and convenience without drawing by experience of Perspective and confirmed by memory of the Perspective Rule.

在一点透视中，确定直线长度距点也可以是设计者根据设计表达效果的需求任意确定；两点透视中确定直线长度的量点，其中一个是设计者根据表达效果的需求任意确定，另一个可以在立面图上用两段圆弧求出，方便、简单，解决了靠透视经验画图，靠记住透视规律验证的草图、效果图的问题。

One of the methods for estimating the vanishing point from the image of the invention includes: a dividing step for dividing the image into snippets; a first detecting step for detecting a local direction of each snippet; a combining step for combining lines of directional pencil of lines according to the local direction detected in the first detecting step; and a first calculating step for calculating at least one vanishing point according to the combined lines of directional pencil of lines in the combining step.

根据本发明的用于从图像检测消失点的方法之一包括：用于将图像划分成小片的划分步骤；用于检测每片的局部方向的第一检测步骤；用于根据在第一检测步骤中检测出的局部方向组合方向线束的直线的组合步骤；和用于根据在所述组合步骤中组合的方向线束的直线计算至少一个消失点的第一计算步骤。

Therefore based on image line observation, the adjustment model of correlation between line and vanishing point is constructed to determine the location of vanishing point from the viewpoint of photogrammetry.

分析了长焦距相机因视场角小在应用灭点标定时遇到的问题，首次研究了专门针对长焦距、小视场角相机的基于点线混合的标定方法。

A vanishing point or a vanishing line indicates the direction information of a s et of parallel lines or a set of parallel planes.

消失点或消失直线蕴含了一组平行直线或一组平行平面的方向信息。

Based on a summary of the methods for photographic survey of strike-dip of structural surfaces on rock slopes, the vanishing point deduction method and its calculation formula are proposed, and the method of vanishing line is further illustrated.

应用这两种方法，在野外产状测量时，须进行方位的控制，而不需要任何长度和高度的控制测量；在内业中也不需要计算任何空间点位置，从而可以减少控制测量工作，增加了摄影外业的灵活性。

Firstly, need some geometric information which include the vanishing line of the ground plane, a vanishing point for the vertical direction and a known vertical height.

该方法首先根据单幅图像提供的一些几何信息———地平面(或者是与地平面平行的平面)上两对不同方向的平行线和竖直方向的一对平行线———在图像上求得地平面的消影线和竖直方向的消影点；然后，用一个已知的参考高度来确定高度测量方程中的比例因子α；最后只要输入待测高度的端点坐标就可以获得该高度的实际值。

I can not negligent, he should do what?

我不能不在意了，他要做什么呢？

It is very dangerous to swim in the river alone.

一个人到河里游泳是很危险的。