Fresueltransform holograms

用法例句

Microimaging of the Fresnel hologram;

菲涅耳全息图的显微成像

The blind digital watermarking algorithm with positive real values is proposed based on optical Fresnel hologram,phase encryption mask (PEM) and DCT (Discrete-Cosine-Transform).

基于光学菲涅耳全息图和相位密码板,结合离散余弦变换,设计了一种新的正实值编码的"盲数字水印"计算方法。

These three algorithms are applied in digital reconstruction program for Fresnel holograms.

基于标量衍射理论和快速傅利叶变换,详细分析了菲涅耳衍射积分的三种计算机模拟算法,并将这三种算法运用到菲涅耳全息图的数字过程中。

Both theoretic analysis and computer simulation show that these expressions gained from this article about off-axis Fresnel hologram are correct and rigorous,but others p.

根据全息理论,通过分析全息图光栅结构的极值频率,利用抽样定理以及频谱分离条件,分析了离轴菲涅耳全息的记录条件,得到了不同于以往文献的最小记录距离及参考光源设置表达式,并做了计算机模拟验证。

A digital reconstruction method of Fresnel hologram with a ridge of Gabor wavelet transform is described.

提出了一种基于Gabor小波变换的菲涅耳全息图的数值再现方法,实现无需空间滤波处理,即可对物光波进行数值再现。

Image scrambling method by using Fresnel transform;

基于菲涅耳变换的图像置乱研究

They are done that computer simulation and performance analyzing of optical encryption based on Fresnel transform.

其次,对目前比较热门的双随机相位编码技术,进行了计算机仿真模拟及安全性能分析,同时,就现有的几种改进方案进行了理论介绍;对菲涅耳变换的光学加密方法进行了计算机模拟及性能分析。

A method of the optical image encryption based on the frequency splitting domain and Fresnel domain is proposed,after the analysis of the fractional Fourier transform and Fresnel transform,by synthesizing the advantages of multi keys and lensless feature of the fractional Fourier transform and Fresnel transform in the optical image encryption system.

结合分数傅里叶变换及菲涅耳变换,在光学图像加密系统中分别具有多密钥性和无透镜性的优点,提出了基于分频域和菲涅耳域的光学图像加密方法。

DIRECT RECORDING OF FRESNEL HOLOGRAMS BY A CCD TARGET AND NUMERICAL RECONSTRUCTING THROUGH COMPUTER SIMULATION

CCD直接记录菲涅耳全息图和计算机模拟实现数字重现

An Analysis for Image Reproduction of Fresnel s Point Light Binary Hologram;

点光源菲涅耳二元全息图再现像质的分析

Digital Reconstruction of Fresnel Hologram with a Ridge of Gabor Wavelet Transform

菲涅耳数字全息图的Gabor小波变换再现法

Object Wave Reconstruction by Using Single in-Line Digital Fresnel Hologram

利用单幅同轴菲涅耳数字全息图重构物光波面

Analysis of Fresnel Off-axis Plane Holographic Reconstructing Images

菲涅耳离轴平面全息“再现像”的分析

Manufacture of the Computer-generated Fresnel Hologram and the Simulated Reconstruction

菲涅耳计算全息干涉图的制作及模拟再现的研究

Scheme of Image Encryption Based on Fresnel Digital Holography

基于菲涅尔数字全息的图像加密方法

The Study of Numerical Reconstruction of Fresnel CGH of a 3-D Object

数字再现三维物体菲涅耳计算全息的研究

Optical Tomography Based on Fresnel Zone Plate Scanning Holography

基于菲涅耳波带板扫描全息术的光学层析成像

Study on WDM Optical Communications Devices Based on Holographic Fresnel Lenses;

基于全息菲涅耳透镜的波分复用光通信器件

Theory Research on Fresnel Diffraction Hologram Display with DMD

数字微镜用于菲涅耳衍射全息显示的理论研究

Fresnel-zone-plate diffraction in scanning holography

扫描全息术中菲涅耳波带板的衍射问题

Analysis and discussion on the similarity of Fresnel diffraction patterns

关于菲涅耳衍射图样相似性的分析与讨论

Optical image encryption based on frequency splitting domain and Fresnel domain

基于分频域和菲涅耳域的光学图像加密方法

Huygens-Fresnel principle

惠更斯－菲涅耳原理

Research and Experiment on the Method to Improve Fresnel Digital Holography Reconstructed Image Quality;

提高菲涅尔数字全息再现像质量的研究

FUNDAMENTAL FORMULAS FOR DESIGNING FRESNEL-TYPE LENSES OF DIFFERENT UTILIZATION

设计不同用途菲涅耳透镜的基本公式

A Numerical Computing Method for the Fresnel Diffraction of Rectangular Aperture

矩孔菲涅耳衍射的一种数值计算方法