本文提出一种提高卷积法再现数字全息图的显示分辨率的新方法。
In this paper, a new method is proposed to solve the problem by investigating convolution reconstruction of digital holograms.
在全息记录过程中,通过连续微小平移物体,记录多帧数字全息图。
A series of digital holograms is obtained by shifting object slightly.
由于数字全息图的数据量庞大,其传输、存储占用大量的通信带宽和存储空间。
Large amounts of communication bandwidth and memory space is occupied to transmit and store digital hologram on account of its enormous data volume.
这是由于电子记录器件CCD的记录面积小,所记录数字全息图的分辨率低,这大大影响了再现像的质量。
This is because of the small recording area of the electronic record device (CCD), so the recorded digital hologram resolution is very low and the reconstruction image quality is affected greatly.
结果表明:直接对无透镜傅里叶数字全息图进行傅里叶逆变换可同时得到与物体完全相同的再现像及其共轭像;
The experimental result shows: In the digital Fourier holography, the reconstructed image and the conjugate image can be obtained by use of Fourier inverse transform directly.
基于多幅图像编码合成的原理,对体视数字像元全息图的制作进行了实验研究。
Experimental study on making stereoscopic digital pixel hologram was presented based on principle of images' encoding and synthesizing.
针对合成孔径数字无透镜傅里叶变换全息图,在理论分析的基础上,提出了相应的分幅再现算法。
For synthetic aperture digital lensless Fourier transform hologram, a screen-division reconstruction method is proposed based on theoretical analysis.
基于色彩合成的数字彩色全息方法,研究了不同波长的再现光对数字彩色全息图再现像质量的影响。
The effect of reconstructed light on the quality of reconstructed images of digital color hologram was analyzed by introducing offset factor.
提出了一种基于色彩合成以及菲涅尔衍射原理,用计算机产生全息图并用数字方法再现彩色全息图的方法。
A method, which is based on the theories of color synthesizing and Fresnel diffraction, is proposed for computer generating hologram and numerical reconstructing color object.
作者在研制激光数字点阵全息图的基础上,尝试使用电子束刻蚀系统制作数字像元全息图以期用于防伪和保密模压全息图的制作。
Trial fabrication of digital pixel hologram which are recorded by an electronic beam lithography system to apply to fabrication of embossing hologram for anti counterfeiting and security is described.
首先简要介绍了在三维显示的应用中计算全息的编码原理,以及全息图数字化再现的几种算法。
Firstly, the coding principle of computer-generated holography (CGH) in applications of 3d display and arithmetic of the digital reconstruction of holograms is introduced briefly.
介绍了单幅全息图数字再现技术,分析了再现算法的特点,提出了准确确定记录距离的算法。
The characteristics of the reconstruction algorithms were analyzed, and the algorithm used to determine the exact recording distance was presented.
用光刻胶记录了水窗波段同轴X射线全息图,并以数字方法再现了原物像。
Soft X-ray holograms within water-windows are recorded in photoresist and reconstructed by using numerical technology.
最后尝试使用数字图像处理技术对全息图及再现像进行处理,取得了较好的实验效果。
At last, we try to process the holograms and reconstruction image with digital image processing technique. The result of the experiment is satisfying.
例子:小点检查3抓墨水涂层沿全息图的边缘包含独特,20数字代码。
Example: dots Check 3 the scratch-off ink coating along the edge of the hologram contains a unique, 20-digit code.
回顾了我们新近提出的单通道菲涅耳数字全息光学系统,该系统能获得由非相干光照射的三维物体的全息图。
We review our recently proposed single-channel optical system for generating digital Fresnel holograms of 3D real-existing objects illuminated by incoherent light.
其中,传输方法包括:将获取的数字图像采用计算机合成全息图;
The transmission method comprises the following steps: synthesizing a hologram from an acquired digital image by using a computer;
其中,传输方法包括:将获取的数字图像采用计算机合成全息图;
The transmission method comprises the following steps: synthesizing a hologram from an acquired digital image by using a computer;
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