灭点

本文结合航空摄影模型给出的灭点几何约束，利用自适应模糊Hough变换，提出了一种建筑物垂直边缘检测方法，并用窗户纹理分析技术来验证高层建筑物的垂直边缘。

In this paper , Combined with vanishing point geometrical restriction given by the aerial photogrammetric modeling , a method for extracting vertical lines based on the adaptive fuzzy Hough transform is presented . Then the extracted vertical lines are validated by analyses of window texture .

论灭点定理在线性透视图法中的确立

The Establishment of ' vanishing Point Theorem ' in Linear Perspective

其次，给出了一种简单有效的垂直边缘灭点坐标确定方法，并提出一种自适应模糊Hough变换直线提取算法，实现了垂直边缘检测；

Secondly , the vanishing point of vertical lines was inferred , and an adaptive fuzzy Hough transform was proposed to detect building 's vertical lines .

本文还给出了当透视投影图象的主灭点为未知时，根据长方体的透视投影，计算其主灭点的坐标及透视变换参数r的计算公式。

A set of equations which are used to evaluate the coordinates of main vanishing point and the parameter r of transformation according to a projection of regular hexahedron when main vanishing point is unknown are also provided .

在单幅影像中，首先将平行线分成分别平行于X、Y、Z坐标轴线的三组平行线，然后利用间接平差，求得它们的灭点X∞、Y∞、Z∞；

In the single image , parallel lines are divided into three groups , which parallel X , Y and Z coordinate axis respectively . Then the vanished points can be computed using the adjustment condition based on collinear three points .

撇开灭点的成角透视图作图方法及正确性验证

The Method of Angular Perspective Without View Points and Its Demonstration

矩阵变换与灭点法绘制透视图

Perspective Drawn by Matrix Transformation Method and Vanishing Point Method

扩展对象表现区域的镜像灭点方法

The method of mirror-image vanish point for expanding display area

应用灭点标定的立体视觉自由曲面三维重建

Three dimensional reconstruction of stereo vision free-form surface based on vanishing-point calibration

一种基于多灭点标定数码相机内外参数的方法

Calibration of Camera 's All Parameters with Vanishing Points

提出了任选两个辅助灭点绘制建筑物透视图的方法。

Research on the method of single image building measuring based on vanishing point ;

基于灭点径向一致性约束的摄像机内参数求解

Approach for Determining Camera Intrinsic Parameters Based on Radial Consistency Constraint of Vanishing Point

基于灭点的单幅图像建模

Vanishing Points Based Modeling from a Single Image

一种新的基于灭点的相机标定方法

New method of camera calibration with vanishing points

灭点定理及视觉成像物体的三维定位

Determination of 3-D position of objects in perspective picture with vanishing - point theorem

灭点位置明确，调整定位方便；

The position of the vanishing point is definite and convenient to adjust and locate ;

用灭点－边缘线性内插算法提取立体图象物体的中心线

Extracting the Center Line of Stereo Image of an Object by Vanishing Point-Edge Linear Interpolation Algorithm

这两种方法依据中心投影灭线和灭点的原理推导。

Both methods are deduced from the principles of vanishing point and vanishing line of perspective geometry .

摄影方法量测结构面产状的灭线法和灭点推导法

Vanishing line method and vanishing point deduction method for photographic survey of strike - dip of structural surfaces

基于灭点理论和物方平行线几何约束的建筑墙面纹理自动纠正

Automatic Rectification of Texture for Building Facades Based on Vanishing Point Geometry and Geometric Constrains of Parallel Object Lines

透视作图中用画面平行面取代灭点

The Construction of Perspectives by Means of Planes Parallel to the Picture Plane Instead of using the Vanishing Point

然后根据透视投影的灭点理论，计算出相机的相对位置；

Then the camera 's relative position and orientation can be achieved using the perspective projection theory of vanishing points .

通过模拟试验统计纠正影像的残差，试验结果显示采用基于灭点理论的纠正方法的精度能够满足轨道图像的几何纠正的要求。

The experimental results show that the precision corrected by this method can meet the requirement of the geometric correction of track images .

连接灭点与已知点的透视，决定了所作直线的透视方向。

The perspective direction of a desired line is usually determined by connecting a given point with the vanishing point of this line .

本文提出了提取立体图象物体中心线的灭点一边缘线性内插算法。

In this paper , a vanishing point-edge linear interpolation algorithm is proposed to extract the center line of stereo image of an object .

在地震剖面上，该圈闭顶界面具有强振幅、长连续反射及尖灭点位置易于识别的特点。

In seismic profile , the top surface of the trap is characterized by high amplitude , continuous reflectance and easily recognized pinch out .

在手工绘制两点透视图时，都会碰到图幅过大造成灭点与视点落在图板之外而难以操作的难题。

When drawing two-point perspective manually , the problem is always occurred that vision point and vanishing point is out of the drawing board .

根据透视投影理论中灭点的几何性质，计算出相机的内、外参数，以此实现相机标定。

The paper presents a novel approach to compute interior and exterior parameters and calibrate camera based on geometry property of vanishing points in perspective projection theory .

文中利用射影几何中射线比的特殊性质，解决了透视灭点在图板外的透视图画法。

According to the nature of projective scale , it has solved the problem of drawing a cars perspective when perspective vanishing point is out of the drafting board .

本文介绍一种不受灭点远近限制的成角透视图法，并对其进行几何论证。

This paper introduces a method that we can apply it to draw angular perspective without view points , and it demonstrates this method according to the geometric principles .