Signal Recovery and Synthesis III最新文献

Phase Retrieval for a Complex-Valued Object Using a Low-Resolution Image 基于低分辨率图像的复值目标相位检索

Signal Recovery and Synthesis III Pub Date : 1990-03-01 DOI: 10.1364/JOSAA.7.000450

J. Fienup, A. Kowalczyk

引用次数: 99

Complex submicrometric object retrieval in partially coherent microscopy 部分相干显微镜中复杂亚微米物体检索

Signal Recovery and Synthesis III Pub Date : 1900-01-01 DOI: 10.1364/srs.1989.wd2

E. Lantz, J. Duvemoy

引用次数: 0

Image Motion Recovery Using the Method of Total Least Squares 基于总最小二乘法的图像运动恢复

Signal Recovery and Synthesis III Pub Date : 1900-01-01 DOI: 10.1364/srs.1989.tha1

C. H. Chu, E. Delp

引用次数: 0

Properties and Computational Implications of Zero-Sheets 零表的性质及其计算意义

Signal Recovery and Synthesis III Pub Date : 1900-01-01 DOI: 10.1364/srs.1989.wc2

R. Bates, B. K. Quek

引用次数: 0

Phase Error Correction by Shear Averaging 剪切平均相位误差校正

Signal Recovery and Synthesis III Pub Date : 1900-01-01 DOI: 10.1364/srs.1989.fb1

J. Fienup

{"title":"Phase Error Correction by Shear Averaging","authors":"J. Fienup","doi":"10.1364/srs.1989.fb1","DOIUrl":"https://doi.org/10.1364/srs.1989.fb1","url":null,"abstract":"Synthetic aperture radar (SAR) [1,2] (and other imaging systems) measures the complex Fourier transform (called the signal history or phase history) of the scene being imaged, but it often suffers from one-dimensional (1-D) phase errors due to unknown system platform motion, target motion, system phase instabilities, and propagation through atmospheric turbulence. If uncorrected, these phase errors can cause severe blurring or smearing of the imagery. Phase errors (the residual phase errors remaining after correction for the measured motion) can be corrected by digital phase-error correction (sometimes called autofocus) methods, the most widely used being \"sub-aperture processing\" and \"prominent-point processing.\" The disadvantage of sub-aperture processing, which is analogous to the concept of a Hartmann sensor in optics, is that it only works for low-order (up to about fourth-order) polynomial-type phase errors. The disadvantage of prominent-point processing, which deconvolves an image based on an estimate of the impulse response of the system, is that it requires the presence of an identifiable, isolated, strong point-like reflector in the scene being imaged. Furthermore, both of these two processing methods require extensive computations.","PeriodicalId":193110,"journal":{"name":"Signal Recovery and Synthesis III","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121325462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 57

Experimental confirmation of superresolution in incoherent confocal scanning microscopy using a singular system inversion 用奇异系统反演的非相干共聚焦扫描显微镜超分辨率的实验证实

Signal Recovery and Synthesis III Pub Date : 1900-01-01 DOI: 10.1364/srs.1989.wd4

M. R. Young, R. Davies, E. Pike, J. Walker

引用次数: 1

Use of Fourier Domain Real Plane-Zeros in Phase Retrieval 傅里叶域实平面零在相位检索中的应用

Signal Recovery and Synthesis III Pub Date : 1900-01-01 DOI: 10.1364/srs.1989.fa4

C. Wackerman, A. Yagle

{"title":"Use of Fourier Domain Real Plane-Zeros in Phase Retrieval","authors":"C. Wackerman, A. Yagle","doi":"10.1364/srs.1989.fa4","DOIUrl":"https://doi.org/10.1364/srs.1989.fa4","url":null,"abstract":"Throughout a large number of disciplines, including astronomy, wave-front sensing and x-ray crystallography, there exists a class of problems referred to as the phase retrieval problem; given the modulus |F(u,v)| of the Fourier transform of an object f(x,y) and some constraints about the form of f(x,y), reconstruct f(x,y). Several solutions to this problem have been proposed, but our research has concentrated on the iterative Fourier transform algorithm (IFTA) [1,2] which has the advantages of being robust under noisy conditions and not computationally burdensome. An area of difficulty for the IFTA however is that the algorithm often stagnates at a reconstruction with stripe like noise, especially for real, non-negative objects [3]. This paper will present research that we have done to address this problem by using information about locations in the Fourier plane where F(u,v) is identically zero, what we will call Fourier domain real-plane zeros (RPZ's). Two new algorithms will be presented: one corrects a stripe stagnation problem from only a single reconstruction; the other modifies the IFTA to allow it to use locations of RPZ's as an additional constraint and prevents stripe stagnation from occurring altogether.","PeriodicalId":193110,"journal":{"name":"Signal Recovery and Synthesis III","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131473011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Signal Processing in Higher Dimensions 高维信号处理

Signal Recovery and Synthesis III Pub Date : 1900-01-01 DOI: 10.1364/srs.1989.wa1

A. Lohmann

引用次数: 0

Feasible Cone Beam Scanning Methods for Exact 3-D Tomographic Image Reconstruction 可行的锥束扫描方法用于三维层析成像的精确重建

Signal Recovery and Synthesis III Pub Date : 1900-01-01 DOI: 10.1364/srs.1989.fd3

H. Kudo, Tsuneo Saito

引用次数: 3

Necessary and sufficient conditions for the existence and synthesis of bipolar incoherent pointspread functions 双极非相干点扩展函数存在与合成的充分必要条件

Signal Recovery and Synthesis III Pub Date : 1900-01-01 DOI: 10.1364/srs.1989.thc4

J. Mait

引用次数: 0