透视投影

Linear CCD Push-broom Image; Frame Perspective Image; the Geometry Model of Sensors; Perspective Projection; Parallel Projection; Affine Transformation; the Rational Function Model; Epipolarity; Image Matching; the Extraction of Building

工程科技II，工业通用技术及设备，工业通用技术与设备线阵CCD推扫式影像；框幅式中心投影影像；传感器模型；透视投影；平行投影；仿射变换；有理函数模型；核线模型；影像匹配；建筑物提取

The techniques of projection center finding and perspective plane determination in 3 D PIV have been investigated profoundly.

对三维PIV中透视投影的视点定位与透视平面的确定技术作了深入的研究，提出了一种确定视点坐标与透视平面的方法，给出了相应的数学关系式，最后通过实验的方法对视点坐标与透视平面的确定技术进行了检验。

Whereas parallel projections are used to project points onto the image plane along parallel lines, the perspective projection projects points onto the image plane along lines that emanate from a single point, called the center of projection.

与平行投影沿着平行线将物体投影到图像平面上不同，透视投影按照从投影中心这一点发出的直线将物体投影到图像平面。

In order to recognize the 2D shapes, we proposed a set of perspective invariants of a pair of coplanar conics in this paper, we suggest a perspective invariant representation of general planar curve based on ellipse, and give an algorithm using the invariants and the representation to recognize 2D shapes.

为了实现二维形状的透视投影不变性识别，本文推导出了一种共面二次曲线对的透视投影不变量，提出了一种基于椭圆的平面曲线的透视不变性表示方法，并且给出了用该不变量和不变性表示方法实现二维形状识别的算法。

Based on the former chapter, one method based on fundamental matrix and crossrate is proposed in this chapter to render novel image considering the character of fundamental and cross-rate invariant in the perspective project, which utilized the correspondence relationship between the given two images and projective invariant between images to render novel image.

该方法通过将基本矩阵的稳定性求解问题转化为一个有条件的极值求解问题，结合遗传算法良好的全局寻优特点，将该方法很好地引入到基本矩阵的求解中，并取得了良好的实验结果。（5）第五章在上一章的基础上，综合基本矩阵和透视投影中的交比不变性的特点，提出了一种基于基本矩阵和交比的生成新图象的方法，这种利用已知两幅图象之间存在的匹配关系和新图象和已知图象存在的透视不变量，来生成新图象。

Based on perspective projection model,a modified parallel projection method for flying pose measurement is proposed.

摄影系统的成像满足透视投影模型，使用平行投影法做飞行姿态交会存在模型误差。

This approach utilizes the fact that if the centerline of target image gets through the center point of the image plane,perspective projection and parallel projection must have the same image-forming property.

依据在目标成像的中轴线通过像面中心的时候，平行投影法和透视投影法有相同的成像特征这一事实，提出了一种无模型误差的修正平行投影法。

That is because the model is based on the ideal situation to presume the viewpoint as infinitely far away from the target. So it doesn't include the information of projection plane changing.

这是由于传统的模型是基于二维的平面运动模型，假设为投影点无穷远的情况，并不包含三维透视投影平面变化的信息，因此不能处理。

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。

By analyzing the view frustum in graphics hard-ware, we deduce an equivalent projective transformation, which enable us to use auniform format to represent the surface splatting based on both software and hardwareimplementation.

在该算法中，通过分析图形硬件中投影矩阵的表达形式，推导出了等价的透视投影变换模型，从而使得基于硬件和基于软件的绘制算法形成统一的表达形式。

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。