查询词典 unwrapping

Phase unwrapping is one of the most important processing steps in SAR interferometry.

相位解缠是合成孔径雷达干涉测量数据处理的关键性步骤之一。

A new method of analysis of intensity modulation is proposed for phase unwrapping of equal-step phase-shifting interferometry.

推导了两种常用等步长相移算法的调制度表达式，提出一种新的调制度分析方法。

The quantitative results of surface deformation were calculated from the phase unwrapping of gray matric and 3D reconstruction.

根据图像映射和条纹灰度矩阵提取条纹图的相位差进行液面变形量的计算，并重建三维变形液面。

Phase unwrapping is the reconstruction of a function on a grid given the value modulo 2 of the function on the grid.

相位展开的是重建一个函数，一个网格，由于价值模2的功能，对网格中。

We expect it will benefit the industry field to break through the optical measuring limits at present by offering some new ideas. Optical measuring research based on moire interferometry has developed for several decades. The main idea of this research is to utilize the moire effect caused by two superimposed gratings of identical or similar spatial frequency. One is the reference grating and it is a virtual grating created by a computer program in this research; The other grating is the image of grating projected on the measured surface by the DLP projector, and this grating will distort because of the different sloped profile of the surface. To superimpose the program-created grating and the captured distorted grating will derive the so-called moire effect. This research combined the basic theory of optical interferometry and moire effect to project the different phases of the projected grating fringes by the phase-shifting method and compute the principal value of arguments between -π,π. In the end, the phase unwrapping program based on discrete Fourier transform of solving PDEs is used to unwrap the phase of the measured surface, and finally the surface profile is derived by the optical measuring system.

以叠纹干涉术为基础的光学检测研究之发展早已行之有年，而在本研究中所采用的投影叠纹法(Projection moiré)之主要精神在於藉由两道空间频率相近或相同的光栅相互叠加而成的效应，其中一道为参考光栅，而本研究中的参考光栅是以程式产生可调整不同空间频率的虚拟光栅；另一道则为投影至待测物表面的光栅影像，而在起伏高度不一的待测表面上的光栅影像会受到待测物表面起伏状况不同而在观测方向产生光栅投影条纹影像的歪曲变形，将电脑产生的参考光栅与由影像撷取装置所获取投影於待测物表面的光栅影像作叠合，便会产生所谓的叠纹效应；利用基本的光学干涉理论与叠纹效应结合，本研究中以相移法来改变投影於待测表面的光栅相位，再以相移法的理论反运算出在带有待测面各点高度资讯之介於-π，π相位主幅角，再以离散傅立叶转换解偏微分方程的相位重建程式还原待测面的相位值，以得知待测面之表面轮廓。

In the phase measurement technology based on grating projection, there are some difficulties such as: the method of projection, phase unwrapping algorithm and 3-D coordinates calibration.

在光栅投射相位测量技术中存在着几个难点，例如：投影方式、相位去包裹算法和3－D坐标标定。

Fringe patterns ; Automatic analysis ; Phase analysis ; Phase shift ; Phase unwrapping

光学条纹图象；自动分析处理；相位分析；相位移动；相位解包络

Phase unwrapping method based on the solution of discrete poisson equation .

基于分支设置的质量导引相位展开算法。

Phase unwrapping method based on the solution of discrete poisson equation.

用于相位展开的调制度罗伯特梯度幅值方差质量图。

Based on the residue theorem of Interferometric SAR,in depth analysis and detailed description of Branch Cut algorithm,one of the most popular InSAR phase unwrapping approaches,has been given in this paper.

本文以干涉SAR相位展开的残差理论为基础对经典的相位展开算法分支阻断算法进行了详细深入的理论分析和解析。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。