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Imaging Through Turbulence
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Book Synopsis Imaging Through Turbulence by : Michael C. Roggemann
Download or read book Imaging Through Turbulence written by Michael C. Roggemann and published by CRC Press. This book was released on 2018-02-06 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn how to overcome resolution limitations caused by atmospheric turbulence in Imaging Through Turbulence. This hands-on book thoroughly discusses the nature of turbulence effects on optical imaging systems, techniques used to overcome these effects, performance analysis methods, and representative examples of performance. Neatly pulling together widely scattered material, it covers Fourier and statistical optics, turbulence effects on imaging systems, simulation of turbulence effects and correction techniques, speckle imaging, adaptive optics, and hybrid imaging. Imaging Through Turbulence is written in tutorial style, logically guiding you through these essential topics. It helps you bring down to earth the complexities of coping with turbulence.
Book Synopsis Imaging Through Turbulence by : Michael C. Roggemann
Download or read book Imaging Through Turbulence written by Michael C. Roggemann and published by CRC Press. This book was released on 2018-02-06 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn how to overcome resolution limitations caused by atmospheric turbulence in Imaging Through Turbulence. This hands-on book thoroughly discusses the nature of turbulence effects on optical imaging systems, techniques used to overcome these effects, performance analysis methods, and representative examples of performance. Neatly pulling together widely scattered material, it covers Fourier and statistical optics, turbulence effects on imaging systems, simulation of turbulence effects and correction techniques, speckle imaging, adaptive optics, and hybrid imaging. Imaging Through Turbulence is written in tutorial style, logically guiding you through these essential topics. It helps you bring down to earth the complexities of coping with turbulence.
Book Synopsis Computational Imaging Through Atmospheric Turbulence by : Stanley H. Chan
Download or read book Computational Imaging Through Atmospheric Turbulence written by Stanley H. Chan and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the seminal work of Andrey Kolmogorov in the early 19400́9s, imaging through atmospheric turbulence has grown from a pure scientific pursuit to an important subject across a multitude of civilian, space-mission, and national security applications. Fueled by the recent advancement of deep learning, the field is further experiencing a new wave of momentum. However, for these deep learning methods to perform well, new efforts are needed to build faster and more accurate computational models while at the same time maximizing the performance of image reconstruction. The goal of this book is to present the basic concepts of turbulence physics while accomplishing the goal of image reconstruction. Starting with an exploration of optical modeling and computational imaging in Chapter 1, the book continues to Chapter 2, discussing the essential optical foundations required for the subsequent chapters. Chapter 3 introduces a statistical model elucidating atmospheric conditions and the propagation of waves through it. The practical implementation of the Zernike-based simulation is discussed in Chapter 4, paving the way for the machine learning solutions to reconstruction in Chapter 5. In this concluding chapter, classical and contemporary trends in turbulence mitigation are discussed, providing readers with a comprehensive understanding of the field's evolution and a sense of its direction. The book is written primarily for image processing engineers, computer vision scientists, and engineering students who are interested in the field of atmospheric turbulence, statistical optics, and image processing. The book can be used as a graduate text, or advanced topic classes for undergraduates.
Book Synopsis Imaging Through Atmospheric Turbulence Via Cepstral Averaging by : Herbert William Swan
Download or read book Imaging Through Atmospheric Turbulence Via Cepstral Averaging written by Herbert William Swan and published by . This book was released on 1982 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Correlation Techniques for Imaging Through Atmospheric Turbulence by : Geoffrey Robert Ayers
Download or read book Correlation Techniques for Imaging Through Atmospheric Turbulence written by Geoffrey Robert Ayers and published by . This book was released on 1989 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Imaging Through Turbulence, Second Edition by : Michael C. Roggemann
Download or read book Imaging Through Turbulence, Second Edition written by Michael C. Roggemann and published by CRC Press. This book was released on 2015-01-26 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This hands-on book thoroughly covers the nature of turbulence effects on optical imaging systems, techniques used to overcome these effects, performance analysis methods, and representative examples on performance. Neatly pulling together widely scattered material, it covers Fourier and statistical optics, turbulence effects on imaging systems, simulation of turbulence effects and correction techniques, speckle imaging, adaptive optics, and hybrid imaging.
Book Synopsis Improving Imaging Through Turbulence Via Aperture Partitioning by :
Download or read book Improving Imaging Through Turbulence Via Aperture Partitioning written by and published by . This book was released on 2010 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Speckle imaging techniques make it possible to do high-resolution imaging through the turbulent atmosphere by collecting and processing a large number of short-exposure frames, each of which effectively freezes the atmosphere. In severe seeing condition, when the characteristic scale of atmospheric fluctuations is much smaller than the diameter of the telescope, the reconstructed image is dominated by?turbulence noise? caused by redundant baselines in the pupil. I describe a generalization of aperture masking interferometery that dramatically improves imaging performance in this regime. The approach is to partition the aperture into annuli, form the bispectra of the focal plane images formed from each annulus, and recombine them into a synthesized bispectrum form which the object may be retrieved. This may be implemented using multiple cameras and special mirrors, or with a single camera and a suitable pupil phase mask. I report results from simulations as well as experimental results using telescopes at the Air Force Research Lab's Maui Space Surveillance Site.
Book Synopsis Superresolution Imaging Through Atmospheric Turbulence by : David Roderick Gerwe
Download or read book Superresolution Imaging Through Atmospheric Turbulence written by David Roderick Gerwe and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The angular resolution of an imaging system is ultimately limited by diffraction effects related to the size of the image pupil once imperfections such as aberrations in the optical surfaces, grainy film, and noisy electronics have been eliminated. However, because of scatterings by turbulence, aerosols, and other inhomogeneities, the atmosphere diminishes the spatial coherence of propagating radiation and reduces the achievable resolution. Improving our ability to see through the atmosphere is of unmeasurable usefulness in astronomy, satellite imaging, remote detection, and all other areas in which high-resolution is desirable.
Book Synopsis Imaging Simulation of Atmospheric Turbulence Based on Phase Screen Methods by : Daniel Wegner
Download or read book Imaging Simulation of Atmospheric Turbulence Based on Phase Screen Methods written by Daniel Wegner and published by . This book was released on 2022* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Frame Selection and Bispectrum for Speckle Imaging Through Atmospheric Turbulence by : Elizabeth A. Harpold
Download or read book Frame Selection and Bispectrum for Speckle Imaging Through Atmospheric Turbulence written by Elizabeth A. Harpold and published by . This book was released on 1995 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :John D. Gonglewski Publisher :SPIE-International Society for Optical Engineering ISBN 13 : Total Pages :196 pages Book Rating :4.3/5 (91 download)
Book Synopsis Artificial Turbulence for Imaging and Wave Propagation by : John D. Gonglewski
Download or read book Artificial Turbulence for Imaging and Wave Propagation written by John D. Gonglewski and published by SPIE-International Society for Optical Engineering. This book was released on 1998 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of SPIE present the original research papers presented at SPIE conferences and other high-quality conferences in the broad-ranging fields of optics and photonics. These books provide prompt access to the latest innovations in research and technology in their respective fields. Proceedings of SPIE are among the most cited references in patent literature.
Book Synopsis Isoplanicity for Imaging Through Turbulent Media by : Charles P. Wang
Download or read book Isoplanicity for Imaging Through Turbulent Media written by Charles P. Wang and published by . This book was released on 1975 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: For optical imaging through turbulence, a measure that specifies how close a given imaging system is to being isoplanic is defined. Its dependence on the spatial resolution, seeing angle, and turbulence structure is given. The results shows that, for low-resolution imaging, the isoplanic condition is usually satisfied, whereas, for diffraction-limited imaging, the isoplanic condition restricts the size of seeing angle.
Author :Larry C. Andrews Publisher :SPIE-International Society for Optical Engineering ISBN 13 : Total Pages :820 pages Book Rating :4.3/5 (91 download)
Book Synopsis Laser Beam Propagation Through Random Media by : Larry C. Andrews
Download or read book Laser Beam Propagation Through Random Media written by Larry C. Andrews and published by SPIE-International Society for Optical Engineering. This book was released on 2005 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since publication of the first edition of this text in 1998, there have been several new, important developments in the theory of beam wave propagation through a random medium, which have been incorporated into this second edition. Also new to this edition are models for the scintillation index under moderate-to-strong irradiance fluctuations; models for aperture averaging based on ABCD ray matrices; beam wander and its effects on scintillation; theory of partial coherence of the source; models of rough targets for ladar applications; phase fluctuations; analysis of other beam shapes; plus expanded analysis of free-space optical communication systems and imaging systems.
Book Synopsis High Resolution Astronomical Imaging Through The Turbulent Atmosphere by : Richard Lee Frost
Download or read book High Resolution Astronomical Imaging Through The Turbulent Atmosphere written by Richard Lee Frost and published by . This book was released on 1979 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research is principally concerned with the digital reconstruction of star images observed with large ground-based telescopes, although the techniques developed here will have application to a broad class of reconstruction problems. Since the work of Labeyrie, the difficulty in producing accurate and detailed reconstructions of stars has stemmed primarily from the extreme degradation of the phase spectrum caused by the atmospheric turbulence, and secondarily from the low-pass filter characteristic of the telescope itself. In this research, we describe solutions to both problems. Our phase estimator is based on the Knox-Thompson phase difference estimator, which we have extended and modified to produce more accurate estimates. The performance of this estimator is evaluated by simulation at various signal-to-noise ratios. We also describe a new non-linear super-resolution algorithm which appears to exhibit the best accuracy and convergence characteristics of any such algorithm proposed to date. It is also evaluated empirically. These two techniques were then used to restore images of the stars Betelgeuse and Capella. In the latter restoration resolution is realized well beyond the diffraction-limit of the telescope. Both reconstructions are consistent with known astrophysical facts, and both appear to be of high quality. (Author).
Book Synopsis Adaptive Beaming and Imaging in the Turbulent Atmosphere by : Vladimir Petrovich Lukin
Download or read book Adaptive Beaming and Imaging in the Turbulent Atmosphere written by Vladimir Petrovich Lukin and published by SPIE Press. This book was released on 2002 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to the wide application of adaptive optical systems, an understanding of optical wave propagation in randomly inhomogeneous media has become essential, and several numerical models of individual AOS components and of efficient correction algorithms have been developed. This monograph contains detailed descriptions of the mathematical experiments that were designed and carried out during more than a decade's worth of research.
Book Synopsis General Theory of Light Propagation and Imaging Through the Atmosphere by : T. Stewart McKechnie
Download or read book General Theory of Light Propagation and Imaging Through the Atmosphere written by T. Stewart McKechnie and published by Springer Nature. This book was released on 2022-10-06 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 2nd edition lays out an updated version of the general theory of light propagation and imaging through Earth’s turbulent atmosphere initially developed in the late ‘70s and ‘80s, with additional applications in the areas of laser communications and high-energy laser beam propagation. New material includes a chapter providing a comprehensive mathematical tool set for precisely characterizing image formation with the anticipated Extremely Large Telescopes (ELTS), enabling a staggering range of star image shapes and sizes; existing chapters rewritten or modified so as to supplement the mathematics with clearer physical insight through written and graphical means; a history of the development of present-day understanding of light propagation and imaging through the atmosphere as represented by the general theory described. Beginning with the rudimentary, geometrical-optics based understanding of a century ago, it describes advances made in the 1960s, including the development of the ‘Kolmogorov theory,’ the deficiencies of which undermined its credibility, but not before it had done enormous damage, such as construction of a generation of underperforming ‘light bucket’ telescopes. The general theory requires no a priori turbulence assumptions. Instead, it provides means for calculating the turbulence properties directly from readily-measurable properties of star images.
Author :Virendra N. Mahajan Publisher :SPIE-International Society for Optical Engineering ISBN 13 :9780819486998 Total Pages :0 pages Book Rating :4.4/5 (869 download)
Book Synopsis Optical Imaging and Aberrations by : Virendra N. Mahajan
Download or read book Optical Imaging and Aberrations written by Virendra N. Mahajan and published by SPIE-International Society for Optical Engineering. This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ten years have passed since the publication of the first edition of this classic text in April 2001. Considerable new material amounting to 100 pages has been added in this second edition. Each chapter now contains a Summary section at the end. The new material in Chapter 4 consists of a detailed comparison of Gaussian apodization with a corresponding beam, determination of the optimum value of the Gaussian radius relative to that of the pupil to yield maximum focal-point irradiance, detailed discussion of standard deviation, aberration balancing, and Strehl ratio for primary aberrations, derivation of the aberration-free and defocused OTF, discussion of an aberrated beam yielding higher axial irradiance in a certain defocused region than its aberration-free focal-point value, illustration that aberrated PSFs lose the advantage of Gaussian apodizaton in reducing the secondary maxima of a PSF, and a brief description of the characterization of the width of a multimode beam. In Chapter 5, the effect of random longitudinal defocus on a PSF is included. The coherence length of atmospheric turbulence is calculated for looking both up and down through the atmosphere. Also discussed are the angle of arrival of a light wave propagating through turbulence, and lucky imaging where better-quality short-exposure images are selected, aligned, and added to obtain a high-quality image.
