Artificial Turbulence For Imaging And Wave Propagation

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Artificial Turbulence For Imaging And Wave Propagation

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Author : John D. Gonglewski
language : en
Publisher: SPIE-International Society for Optical Engineering
Release Date : 1998

Artificial Turbulence For Imaging And Wave Propagation written by John D. Gonglewski and has been published by SPIE-International Society for Optical Engineering this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Science categories.

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.

Artificial Turbulence For Imaging And Wave Propagation

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Author : John Gonglewski
language : en
Publisher:
Release Date : 1998

Artificial Turbulence For Imaging And Wave Propagation written by John Gonglewski and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.

Imaging Through Turbulence

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Author : Michael C. Roggemann
language : en
Publisher: CRC Press
Release Date : 2018-02-06

Imaging Through Turbulence written by Michael C. Roggemann and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-02-06 with Technology & Engineering categories.

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.

Synthetic Aperture Radar Image Processing Algorithms For Nonlinear Oceanic Turbulence And Front Modeling

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Author : Maged Marghany
language : en
Publisher: Elsevier
Release Date : 2024-07-19

Synthetic Aperture Radar Image Processing Algorithms For Nonlinear Oceanic Turbulence And Front Modeling written by Maged Marghany and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-07-19 with Science categories.

Synthetic Aperture Radar Image Processing Algorithms for Nonlinear Oceanic Turbulence and Front Modelling is both a research- and practice-based reference that bridges the gap between the remote sensing field and the dynamic oceanography exploration field. In this perspective, the book explicates how to apply techniques in synthetic aperture radar and quantum interferometry synthetic aperture radar (QInSAR) for oceanic turbulence and front simulation and modelling. The book includes detailed algorithms to enable readers to better understand and implement the practices covered in their own work and apply QInSAR to their own research.This multidisciplinary reference is useful for researchers and academics in dynamic oceanography and modelling, remote sensing and aquatic science, as well as geographers, geophysicists, and environmental engineers Details the potential of synthetic aperture radar in imaging ocean surface dynamical features Includes detailed algorithms and methods, allowing readers to develop their own computer algorithms Covers the latest applications of quantum image processing

Transionospheric Synthetic Aperture Imaging

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Author : Mikhail Gilman
language : en
Publisher: Birkhäuser
Release Date : 2017-04-13

Transionospheric Synthetic Aperture Imaging written by Mikhail Gilman and has been published by Birkhäuser this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-04-13 with Mathematics categories.

This landmark monograph presents the most recent mathematical developments in the analysis of ionospheric distortions of SAR images and offers innovative new strategies for their mitigation. As a prerequisite to addressing these topics, the book also discusses the radar ambiguity theory as it applies to synthetic aperture imaging and the propagation of radio waves through the ionospheric plasma, including the anisotropic and turbulent cases. In addition, it covers a host of related subjects, such as the mathematical modeling of extended radar targets (as opposed to point-wise targets) and the scattering of radio waves off those targets, as well as the theoretical analysis of the start-stop approximation, which is used routinely in SAR signal processing but often without proper justification. The mathematics in this volume is clean and rigorous – no assumptions are hidden or ambiguously stated. The resulting work is truly interdisciplinary, providing both a comprehensive and thorough exposition of the field, as well as an accurate account of a range of relevant physical processes and phenomena. The book is intended for applied mathematicians interested in the area of radar imaging or, more generally, remote sensing, as well as physicists and electrical/electronic engineers who develop/operate spaceborne SAR sensors and perform the data processing. The methods in the book are also useful for researchers and practitioners working on other types of imaging. Moreover, the book is accessible to graduate students in applied mathematics, physics, engineering, and related disciplines. Praise for Transionospheric Synthetic Aperture Imaging: “I perceive that this text will mark a turning point in the field of synthetic aperture radar research and practice. I believe this text will instigate a new era of more rigorous image formation relieving the research, development and practitioner communities of inconsistent physical assumptions and numerical approaches.” – Richard Albanese, Senior Scientist, Albanese Defense and Energy Development LLC

Signal Modeling Of Turbulence Distorted Imagery

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Author :
language : en
Publisher:
Release Date : 2009

Signal Modeling Of Turbulence Distorted Imagery written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.

Understanding turbulence effects on wave propagation and imaging systems has been an active research area for more than 50 years. Conventional atmospheric optics methods use statistical models to analyze image degradation effects that are caused by turbulence. In this paper, we intend to understand atmospheric turbulence effects using a deterministic signal processing and imaging theory point of view and modeling. The model simulates the formed imagery by a lens by tracing the optical rays from the target through a band of turbulence. We examine the nature of the turbulence-degraded image, and identify its characteristics as the parameters of the band of turbulence, e.g., its width, angle, and index of refraction, are varied. Image degradation effects due to turbulence, such as image blurring and image dancing, are revealed by this signal modeling. We show that in fact these phenomena can be related not only to phase errors in the frequency domain of the image but also a 2D modulation effect in the image spectrum. Results with simulated and realistic data are provided.

Scene Motion Detection In Imagery With Anisoplanatic Optical Turbulence

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Author : Richard Lowell Van Hook
language : en
Publisher:
Release Date : 2021

Scene Motion Detection In Imagery With Anisoplanatic Optical Turbulence written by Richard Lowell Van Hook and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with categories.

In long range imaging applications, anisoplanatic atmospheric optical turbulence imparts spatially- and temporally-varying blur and geometric distortions in acquired imagery. The ability to distinguish true scene motion from turbulence warping is important for many image processing and analysis tasks. We present two novel scene-motion detection algorithms specifically designed to operate in the presence of anisoplanatic optical turbulence.The first method is based on modeling background intensity fluctuations with a Gaussian mixture model (GMM). The GMM parameters are formed using knowledge of the theoretical turbulence tilt variance statistics derived from the Fried parameter or refractive index structure function. Thus, this new method is referred to as the Tilt Variance GMM (TV-GMM) algorithm. While most prior intensity methods use empirical temporal data to estimate a background model, this approach is based on the theoretical atmospheric tilt variance statistics. This approach effectively avoids contamination in the background statistics when true scene motion is present. The approach also considers the application of global image registration as a preprocessing step to improve performance by employing the recently developed residual tilt variance analysis that accounts for image registration as described in [1].Rather than forming its statistical model on the (optionally registered) input imagery directly, the second method uses a turbulence simulator. Multiple realizations of atmospheric turbulence are applied to a single prototype background image to create a non-contaminated image stack of the scene background. To incorporate the spatial relationship between neighboring pixels, each pixel's intensity is treated as an independent variable of a single Gaussian distribution. Although full anisoplanatic turbulence simulators are available, alternative approaches are sufficient provided that the anisoplanatic warping is accurate. In this work, a warping simulator based on the tilt field statistics described in [2] is used to provide a fast and reasonable approximation. Because this second method uses a warping simulator, it is referred to as the Warping Simulator Gaussian Model (WS-GM) algorithm.Both quantitative and qualitative performance analyses are conducted, and the proposed methods are compared against several state-of-the art algorithms using both synthetic and real world data sets. The three synthetic image datasets are generated with an anisoplanatic numerical wave-propagation simulator [3] that enables per-pixel motion truth. Additionally, TV-GMM and WS-GM are extended to operate on imagery containing multiple color bands, referred to as Multiband TV-GMM (MB-TV-GMM) and Multiband WS-GM (MB-WS-GM), respectively. Both TV-GMM and WS-GM outperform the benchmark methods in the study on grayscale imagery, and MB-TV-GMM and MB-WS-GM outperform their grayscale counterparts.

Adaptive Beaming And Imaging In The Turbulent Atmosphere

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Author : Vladimir Petrovich Lukin
language : en
Publisher: SPIE Press
Release Date : 2002

Adaptive Beaming And Imaging In The Turbulent Atmosphere written by Vladimir Petrovich Lukin and has been published by SPIE Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Science categories.

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.

Artificial Intelligence In Cardiothoracic Imaging

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Author : Carlo N. De Cecco
language : en
Publisher: Springer Nature
Release Date : 2022-04-22

Artificial Intelligence In Cardiothoracic Imaging written by Carlo N. De Cecco and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-04-22 with Medical categories.

This book provides an overview of current and potential applications of artificial intelligence (AI) for cardiothoracic imaging. Most AI systems used in medical imaging are data-driven and based on supervised machine learning. Clinicians and AI specialists can contribute to the development of an AI system in different ways, focusing on their respective strengths. Unfortunately, communication between these two sides is far from fluent and, from time to time, they speak completely different languages. Mutual understanding and collaboration are imperative because the medical system is based on physicians’ ability to take well-informed decisions and convey their reasoning to colleagues and patients. This book offers unique insights and informative chapters on the use of AI for cardiothoracic imaging from both the technical and clinical perspective. It is also a single comprehensive source that provides a complete overview of the entire process of the development and use of AI in clinical practice for cardiothoracic imaging. The book contains chapters focused on cardiac and thoracic applications as well more general topics on the potentials and pitfalls of AI in medical imaging. Separate chapters will discuss the valorization, regulations surrounding AI, cost-effectiveness, and future perspective for different countries and continents. This book is an ideal guide for clinicians (radiologists, cardiologists etc.) interested in working with AI, whether in a research setting developing new AI applications or in a clinical setting using AI algorithms in clinical practice. The book also provides clinical insights and overviews for AI specialists who want to develop clinically relevant AI applications.

Adaptive Optics For Industry And Medicine Proceedings Of The Sixth International Workshop

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Author : Christopher Dainty
language : en
Publisher: World Scientific
Release Date : 2008-01-15

Adaptive Optics For Industry And Medicine Proceedings Of The Sixth International Workshop written by Christopher Dainty and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-01-15 with Science categories.

This proceedings volume presents the very latest developments in non-astronomical adaptive optics. This international workshop, the sixth in a biennial series, was the largest ever held and boasted significant involvement by industry. Adaptive optics is on the verge of being used in many products; indeed, at this meeting, the use of adaptive optics in DVD players was disclosed for the first time./a