查询词典 interferogram

A method for automatic fringe extracting and coding (interferogram characteristic information extracting) with digital image processing technique is developed.

介绍了一种用于计算全息数字波面干涉仪中采用数字图像处理技术采集干涉图的特征信息的方法。

The fundament of flat terrain phase effect and its removal are stated. The interferogram consists, for each pixel, of the complex conjugate product of two SAS images directly, which cant reflect the actual terrain change. The general phase trend in range can be considered as the phase generated by an ideally flat terrain and is often subtracted from the interferogram before further processing.

论述了水平地形效应产生原理及其消除方法，由于水平地形效应的存在使得两幅SAS复图像直接复共轭相乘得到的相位图不能直观地反映出实际地形的拓扑变化，所以在对干涉相位图进行滤波及相位展开处理前应当消除干涉相位图像的水平地形效应。

According to the characteristic of the data processing, a interferogram regrouping error correction algorithm is designed, and devise a method to correct the sampling position error of the central dark fringe.

通过对其数据处理流程特点的分析，设计了一种归一化算法，对由干涉图重组时产生的误差进行了校正，并对在数据采集过程中干涉图的中心暗纹位置的采样误差进行了二次曲线拟合校正。

Assumed the probability density function of signal and noise of real part and imaginary part of SAR interferogram.

1将干涉图复数据分为实部和虚部，对实部、虚部的信号和噪声的概率密度函数进行假定。

The modified neighborhood field average filter,modified median filter and mode filter are analyzed,and a new practical method,which combines multilook average and nonlinear filter to reduce noise in the wrapped phase map,is presented.At the end of this paper,the characteristics of these approaches are compared and the experimental results by processing ERS-1/2 data are used to confirm that the method is more effective in suppressing noise in the interferogram of INSAR.

在比较条件邻域平均、模糊中值滤波和模数滤波3种非线性噪声抑制方法的基础上，提出了一种结合多视平均和非线性滤波的干涉相位图噪声抑制实现方法，并用ERS-1/2数据的实际处理结果验证了方法的有效性。

It is found out that the different titling directions of moving mirror affect the system error independently, at the same time they can be added. The original phase of the interferogram is changed slowly or rapidly with the optical path difference changed, and the phase error is different too.

在动镜的运动中，左右方向的倾斜和俯仰方向的倾斜对系统的影响彼此具有独立性，又具有叠加性；干涉图中初相位因子随光程差改变缓慢变化或快速变化，对相位误差的影响也不全相同。

Tansformed the real part and imaginary part of interferogram to stationary wavelet domain, analyzed the PDF of signal and noise wavelet coefficients using Pearson distribution system, then evaluated the wavelet coefficients of signal in stationary wavelet domain by Maximum A Posterior criteria to reconstruct the interferogram.

2将干涉图的实部和虚部分解到静态小波域，用Pearson分布系作近似，分析了信号和噪声小波系数的概率密度函数，在静态小波域用MAP准则估计信号的小波系数用于干涉图的重建。

Computer simulation shows this method is effective,and fits interferogram with quartic polynomial well.

计算机仿真实验证明这种方法行之有效，且利用4次多项式拟合干涉图效果更好。

According to the theory of Sagnac FourierTransform spectrometer, the method which we used to reconstruct the spectrum correctly from the captured interferogram was developed. With the steps of trend term correction, apodisation, phase correction and conjugate symmetrization applied to the interferogram captured and then reconstructed it, the error was avoid.The experiment to reconstruct the spectrum of monochromatic light source such as Helium lamp used in the developed prototype was carried out. The results agree with the nominal spectrum distibutions of the sources with the accuracy of 4nm.

介绍了Sagnac型干涉成像光谱仪基本原理，针对上述问题得到一套对采集得到的干涉图进行光谱重构的方法，通过对所采集干涉图进行消趋势项、切趾、相位校正、共轭对称化等步骤的处理，再进行重构，即可有效避免直接重构所带来的误差，使用所研制的原理样机对氦灯等单色光源进行光谱曲线重构实验，得到的光谱强度分布曲线与标称曲线基本吻合，光谱复原精度达到了4nm，具有较好的重构效果。

In order to provide uniform motion of the interferometer mirrors, a driving system based on ATMEL89C52 singlechip was described. With the help of laser interferogram, the system achieved not only uniform velocity but also precise position through feedback controlling. It satisfys the spectrometer's velocity demand.

为实现干涉仪的平稳运动，提出一种基于ATMEL89C52单片机的干涉仪驱动系统，在激光干涉信号配合下，通过反馈控制，该系统实现了比较匀速的速度控制和精确的位置控制，满足光谱仪对干涉仪的速度要求。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。