4f

Image Restoration of the 4f Optical System Based on Neural Networks

基于神经网络的光学4f系统图像复原

Both of the methods are based on the 4f optical imaging system .

这两种技术都是建立在4f光学成像系统基础之上的。

Inverse Filtering Denoising Method for 4f System Based on Step Function Response

基于阶跃响应的4f系统逆滤波去噪方法

Development of 4F system for observation of particles

用于微粒子观测的4F传像系统的研制

Study on the angular displacement compensation of filter function in the 4f optical system

4f光学系统中滤波函数角位移补偿的研究

Wavelet threshold denoise method for 4f system based on SAR statistic parameters

基于SAR统计参数的4f系统小波阈值去噪方法

The Formulae of Crystal Field Potential for 4f Electron with Different Symmetry

4f电子晶场势在不同对称性下的表示

The effect of 4f Fourier lens system on the holographic measurement of particles field

4F傅里叶变换透镜系统对粒子场全息记录的影响

Double random phase color image encryption technology the 4f system based on the CGH .

基于计算全息的彩色图像加密技术。

Investigation of Optical Nonlinear Dynamics by Pump-Probe 4F Imaging Technique

应用泵浦探测4F成像技术研究光学非线性动力学

Spectrum Enlargement and Wavelet Transform on Planar Fractal by Improved 4f Fourier Optical System

改进4f傅里叶光学系统实现平面分形的频谱放大和小波变换

Input images can also be reconstructed with good quality by optical experiment utilizing an actual optical 4f system .

利用实际的光学4f系统进行光学实验，也能以良好的质量重构输入图像。

Diagnostic coronary angiography by femoral artery approach with 4F catheter in 115 cases

使用4F导管经股动脉径路行冠脉造影115例体会

Further analysis of 4F Fourier transform lens in holography measurment of particle field

4F傅里叶变换系统粒子场测量的探讨

Inquiring into Technique of 4F 0.06 AC Resin Blown Film

4F0.06AC树脂吹塑薄膜技术的探讨

Calculation of intensity for transitions within 4f ~ N configuration of rare-earth ions in crystals

晶体中稀土离子4f~N组态内光子跃迁强度的计算

Adopting 4f configuration to enhance the spatial coherence , building and adjusting of the system are more convenient .

且采用4f结构，提高了空间相干性，使装调更为方便；

Inhibition Anti-aliasing using 4f filtering systems

4f滤波系统抑制混淆

Up to now , the 4f system or the Fourier optical transform system is used in spatial pseudocolor encoding processing .

假彩色编码处理通常采用4f系统，即傅里叶光学变换系统。

Placing filter on the Fourier plane in an optical 4f system is a usual way to implement optical wavelet transform .

在典型的光学4f系统的谱面上加滤波片是实现光学小波变换的常用方法。

Colorization of Pictures by 4f Reflection system

用反射式4f系统使图片彩色化

The holographic radial phase and frequency double gratings are reproduced by means of filtering in 4f Fourier transform system .

利用4f傅里叶交换系统，通过频谱面滤波手段，将圆盘玻璃振幅型径向光栅复制成全息式相位径向光栅。

For their special 4f electronic configuration and similarity with Ca2 + , REEs are mainly used in industry and medicine .

由于拥有独特的4f电子轨道结构以及与钙离子相似的性质，稀土元素广泛应用于工业、医药等行业。

In conclusion , Fourier transform lens with convergent light illumination is more advanced than 4f system in reducing the aperture .

由此可得出，会聚光照明的傅立叶变换光路，在减小透镜口径方面优于4f系统。

Select 4f spatial filtering system , under such circumstances , clear weld pool surface deformed laser stripe images are captured .

选择4f空间滤波系统，在一定参数下拍摄到了比较清晰的熔池反射变形激光条纹图像。

The theory of lens imaging in Fourier optic to improve the imaging intensity of one SLM pixel in 4f system is used .

利用傅里叶光学成像理论，推导出了在4f系统中单个SLM像素成像的光强分布，并由此定量地分析了像素位置偏移对读出误码率的影响。

In this paper three-dimensional object field can be transformed into three-dimensional image field by the 4F Fourier lens system according to the theory and experiment .

本文从理论和实验上应用4F富里叶变换透镜系统，把三维物场转换为三维象场。

The principle and method of holographic record of the particle field by 4F Fourier lens system and holographic filter are introduced in this paper .

本文介绍用4F傅里叶透镜系统和全息滤波器对粒子场分布作全息记录的原理和方法。

A controversial question has long been the role of 4f orbitals and the covalent characteristics of rare earth compounds bonds .

稀土化学键的共价性和4f轨道在成键中的作用是化学界长期争论的问题之一。

Objectives To compare 4F Catheter with 6F catheter in the diagnostic coronary angiography by femoral artery approach .

目的比较使用4F及6F造影导管经股动脉径路行冠状动脉造影的可行性。