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傅里叶平面
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  fourier plane
     The sources of noise considered are the grain-noise and the phase-noise at the input and Fourier plane.
     输入及傅里叶平面上记录介质的颗粒噪声及相位起伏作为两个主要的噪声源.
短句来源
     One-dimensional optical correlator using a liquid crystal television (LCTV) in the Fourier plane is described. The LCTV is used to encode unipolar binary phase-only filters for real-time scrambling/descrambling images.
     文章介绍了一种一维光学相关器,在其傅里叶平面内,将液晶电视( L C T V) 编码成单极二元纯位相滤波器用于图像实时编码或解码。
短句来源
     A new method of producing a Haar edge wavelet matched filter by using optical 4 f system is described. An optical implementation of Haar wavelet transform is presented. When a sinusoidal grating is put in the Fourier plane, the positive and negative one order of diffraction image edges of the two squares in the input plane will closely contact and a π phase is produced, which just meets the polarity of wavelet requirements.
     提出一种应用4f 系统制作边 Haar 子波匹配滤波器从而实现光学子波变换的新方法.在傅里叶平面引入正弦光栅,使输入平面两个方孔的正负一级衍射像边缘密接,且位相相反,达到子波要求的极性.给出了理论分析和提取图像边特征的实验结果.
短句来源
  相似匹配句对
     From Plan to Section
     从平面到剖面
短句来源
     ON P—PLANE FIELD
     p—平面
短句来源
     A novel method for evaluating the resolution of plane diffraction gratings
     用傅里叶变换法测试平面衍射光栅的分辨特性
短句来源
     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
短句来源
     Chirp Fourier Transformer
     Chirp傅里叶变换器
短句来源
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  fourier plane
Using a Whitney decomposition in the Fourier plane, a general bilinear operator is represented as infinite discrete sums of time-frequency paraproducts obtained by associating wave-packets with tiles in phase-plane.
      
A procedure for accurately bringing the signal photodetector into coincidence with the center of the Fourier plane of the microscope is described.
      
When atomic rows in a crystal layer are used to focus a beam from an electron microscope, the intensity distribution behind the crystal represents a grating of narrow peaks with diameters from 0.03 to 0.04 nm in the first Fourier plane.
      
Methods for the holographic subtraction of the images involving the detection and spatial filtering in the Fourier plane of the optical system are proposed and realized in [3-5].
      
Two rival techniques used in the analysis of Bragg diffraction of two-dimensional light beams by thick unslanted phase gratings, namely Fourier plane wave decomposition and 2-D coupled-wave theory, are compared.
      
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A technique of color restoration for faded color films with whitelight optical processing is presented. The color restoration can be accomplished with spatial encoding and color filtering. Although the technique offers an advantage of faded color encoding, however, it is not a real-time technique. We have also presented a real-time color restoration with white-light optical processing technique. Experimental demonstrations of this color restoration technique are also included. We have shown that the white-light...

A technique of color restoration for faded color films with whitelight optical processing is presented. The color restoration can be accomplished with spatial encoding and color filtering. Although the technique offers an advantage of faded color encoding, however, it is not a real-time technique. We have also presented a real-time color restoration with white-light optical processing technique. Experimental demonstrations of this color restoration technique are also included. We have shown that the white-light color restoration is a simple, versatile and economical technique. The white-light processing technique also offers the advantage of direct viewing capability, which is very suitable for instantaneous color restoration and enhancement applications.

本文提供了用白光信息处理技术作褪色透明彩色照片彩色复原的原理和实验,其中之一是由空间编码和彩色滤波两步骤完成的,即将待处理的透明彩色片用空间编码技术编制在一张黑白感光底片上,在白光光学处理系统的傅里叶平面中对这编码的黑白片的频谱进行彩色滤波,最后在系统的输出平面给出彩色增强或复原的图象,另一种是用白光处理技术作褪色透明彩色片的彩色复原实时处理,它可供及时的直接观察并且有操作简便,成本经济和能灵活多用的特点,这两种技术为彩色图象的彩色增强和复原提供了新方法。

The effect on noise performance of a white-light optical signal processor under temporally partial coherent illumination is presented. The output signal-to-noise ratio (SNE) is evaluated through the well-known partial coherence theory. This output SNE is used as a means of measurement for the noise performance of the proposed white-light processing system. The sources of noise considered are the grain-noise and the phase-noise at the input and Fourier plane. Except For the grain-noise at the input plane, we...

The effect on noise performance of a white-light optical signal processor under temporally partial coherent illumination is presented. The output signal-to-noise ratio (SNE) is evaluated through the well-known partial coherence theory. This output SNE is used as a means of measurement for the noise performance of the proposed white-light processing system. The sources of noise considered are the grain-noise and the phase-noise at the input and Fourier plane. Except For the grain-noise at the input plane, we show that the output SNE can be improved considerably by using a broadband temporally partial coherent illumination.

本文研究了时间相干性对光学信息处理系统噪声演绩的影响.用Wolf的部分相干光理论评价了输出信噪比.用输出信噪比作为信息处理系统噪声演绩的度量.输入及傅里叶平面上记录介质的颗粒噪声及相位起伏作为两个主要的噪声源.结果表明,除了在输入平面上的颗粒噪声外,输出信噪比一般都可以通过使用时间部分相干照明而得到改善

This Paper prestents a method which enhances the edge of linear objects with a certain width. The enhancement processing has been finished by using a photorefractive crystal Cu:KNSBN placed on the Fourier transform plane of the coherent system. Under certain conditions a Laplacian operator is formed on the transform plane because of the Phase conjugation effeCt inside the crystal,so that the edge enhancing image is obatined on the image plane at last. Experimeatal results and brief theoretical analysis are presented...

This Paper prestents a method which enhances the edge of linear objects with a certain width. The enhancement processing has been finished by using a photorefractive crystal Cu:KNSBN placed on the Fourier transform plane of the coherent system. Under certain conditions a Laplacian operator is formed on the transform plane because of the Phase conjugation effeCt inside the crystal,so that the edge enhancing image is obatined on the image plane at last. Experimeatal results and brief theoretical analysis are presented in this peper.

介绍一种对具有宽度的线状物体实现边缘增强从而达到识别目的的方法。利用置于相干系统傅里叶平面的光折变晶体CU:KNSBN在一定条件下产生位相复共轭效应,从面形成拉普拉斯算子,最后在象平面输出线状物体的边缘增强象。文中给出实验结果及扼要的理论分析。

 
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