分析了逆向工程中自由曲面的反求过程，对接触式和非接触式测量方法进行了比较。
The process of constructing free-form surfaces in Reverse Engineering and compares the untouched and touched measure methods was alysed in this paper.
对曲面重构误差和总反求误差进行了分析。
The error of surface reconstruction and the whole error are analyzed.
通过误差矩阵和模具的工作特性函数反求输入控制量是加工高精度的自由曲面光学镜所面临的难题。
It is a difficult problem to solve the inputted data when the matrix of error data and the working characteristics of the tool are known in precision machining.
文中根据曲线曲面型值点，分别用四种参数化方法构造节点矢量，利用NURBS方法反算控制点。
In this paper, the control points are calculated based on the curve or surface's data points and the knot vector which is calculated with four kinds of parameterization by the method of NURBS.
论文介绍了一种利用圆环形滚轮测头测量复杂曲面的新技术，提出了反求曲面廓形数据点的测量原理。
A new measuring technique is presented which makes use of an annular roller probe to obtain the data of complex surface and the measurement principle is discussed.
现有自由曲面的重建与仿形制造是反求工程中的关键技术之一。
Reconstruction and copying machining of existing freeform surface are one of key technology in reverse engineering.
“点云”数据的预处理和曲面重建技术是反求工程的关键技术，是产品CAD模型建立的前提。
Preprocessing of "points cloud" data and surface reconstruction are the critical technology of reverse engineering and are the premises of building product CAD model.
分析了影响内曲线油马达使用寿命的两个主要因素：导轨曲面的损伤和反链敲缸现象，并提出了相应的解决措施。
Two factors, guide surface damage and chain impact, which effecting the run life of inner curved hydraulic motor, are analysed. Related prevention measure are presented.
根据三维散乱点集构造曲面剖分在CAGD/CAD、反求工程等方面有着十分广泛的应用。
Surface triangulations based-on 3D arbitrary point-sets are widely applied in CAGD/CAD and reverse-engineering, etc.
提出了一种在反求工程中对散乱点云数据进行自动分割与曲面模型重构的方法。
A method of automatic segmentation and surface reconstruction of scattered data in reverse engineering was presented.
首先给出能够表示任意多个自由曲面拓扑结构的描述，该模型可用于表示反求工程中的任意物体。
A simple topology model is presented to represent complex topology structure of free form surfaces to compose arbitrary object for reverse engineering.
分析了应用于反求工程的几种曲面拟合方法，提出一种基于神经网络技术的自由曲面拟合新方法。
Some curve surface fitting methods used in the reverse engineering are analyzed, and a new free curve surface fitting method based on ANN is presented.
针对机械零件反求建模过程中常见二次曲面的表面重建问题，提出了曲面拟合分步计算法。
To solve the problem of quadric surface reconstruction in reverse modeling for mechanical parts, a two-step fitting algorithm was presented.
样条曲面的局部设计是完全根据反求工程CAD建模的实际需求而提出的一种局部区域曲面设计方案。
Local B-spline surface designing strategy, a surface coincided technology, is proposed entirely originated from practical requirements in reverse engineering CAD modeling.
该算法直接平滑曲面在平行光照射下的图像，然后通过光度立体技术反求出光顺后的曲面。
We smooth the photometric image of surface by some existing method in digital image processing, then get an approach to original surface by the photometric stereo technology.
曲面内腔类零件的反求有别于轮廓外形的反求，主要体现在数据采集的方法，点云的处理，特征点的提取以及曲线的拟合。
The reverse of lumen part is different from outline, such as collect data method, treat with point, pick up feature point and curve fitting.
介绍了以反求工程为技术支撑的复杂曲面模具数控加工的基本原理和实现过程关键技术—样件表面数字化技术和曲面重构技术。
The key technology about surface digitizing and reconstruction in the mold tooling digitized manufacturing based on the reverse engineering as well as the basic theory is analyzed.
对反求工程中的点云数据处理，给出一种基于特征的区域分割法来划分点云，为后续曲面拟合提供有利条件。
For dealing with the cloud data in reverse engineering, one region-division method which based on character is presented to divide up cloud data, this provides advantage to the later surface fitting.
对机械产品的反求过程进行了系统分析，对反求三维测量、利用反求软件进行曲面重构、及三维造型等反求工程中的关键技术阶段进行了详细的探讨。
Deals with the process of reverse engineering, Expatiate the key periods of reverse engineering for 3d measurement using reverse software to rebuild the surface and CAD modeling in detail.
介绍了以反求工程为技术支撑的自由曲面数控加工的基本原理和全过程，并对其中的数字化扫描、CAD建模及刀具轨迹生成等关键技术作了进一步的分析。
Basic theory and procedure of NC machining for free-form surface based on reverse engineering were introduced. Digital measure and CAD modeling as well as tool path generating were analyzed.
通过对细分曲面的两种基本细分模式的研究，设计了一个基于细分的反求工程CAD系统。
CAD model reconstruction system based on subdivision is developed according to deeply study the subdivision surface.
自由曲面三维重构技术在反求工程、虚拟现实等领域具有广泛的应用价值。
The 3D reconstruction of free-form surfaces has been widely used in the fields of reverse engineering and virtual reality.
三维轮廓测量技术是实现反求工程的重要手段，复杂曲面建模技术是反求工程研究的重点内容。
The 3D profile measuring technology is an important approach, and composite surface modeling is the main content for researching in reverse engineering.
分析了影响内曲线油马达使用寿命的两个主要因素：导轨曲面的损伤和反链敲缸现象，并提出了相应的解决措施。
Two factors, guide surface damage and chain impact, which effecting the run life of inner curved hydraulic motor, are analysed.
复杂曲面零件的几何模型重构是反求工程的研究重点之一。
One of the key research issues in Reverse Engineering is about the geometric modeling restruction of parts with complex surfaces.
针对反求工程中常见的过渡曲面特征，提出了一种过渡曲面特征的提取算法。
A new method to extract blend surface feature is presented according to the common features of blend surface in reverse engineering.
针对复杂曲面数据测量及曲面重构的要求，以玩具狗头为例，介绍使用三维激光扫描仪的自由曲面反求过程中产品点数据的处理方法，以及CAD模型的重构技术，分析了反求建模中存在的问题。
The processing methed of data tested by laser scanner and reconstruction technology of CAD model in the reverse process of free-form surface were persented with toy of dog head as example.
针对复杂曲面数据测量及曲面重构的要求，以玩具狗头为例，介绍使用三维激光扫描仪的自由曲面反求过程中产品点数据的处理方法，以及CAD模型的重构技术，分析了反求建模中存在的问题。
The processing methed of data tested by laser scanner and reconstruction technology of CAD model in the reverse process of free-form surface were persented with toy of dog head as example.
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