Two Dimensional Phase Unwrapping
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Two Dimensional Phase Unwrapping
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Author : Dennis C. Ghiglia
language : en
Publisher: Wiley-Interscience
Release Date : 1998-04-28
Two Dimensional Phase Unwrapping written by Dennis C. Ghiglia and has been published by Wiley-Interscience this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998-04-28 with Science categories.
A resource like no other-the first comprehensive guide to phase unwrapping Phase unwrapping is a mathematical problem-solving technique increasingly used in synthetic aperture radar (SAR) interferometry, optical interferometry, adaptive optics, and medical imaging. In Two-Dimensional Phase Unwrapping, two internationally recognized experts sort through the multitude of ideas and algorithms cluttering current research, explain clearly how to solve phase unwrapping problems, and provide practicable algorithms that can be applied to problems encountered in diverse disciplines. Complete with case studies and examples as well as hundreds of images and figures illustrating the concepts, this book features: A thorough introduction to the theory of phase unwrapping Eight algorithms that constitute the state of the art in phase unwrapping Detailed description and analysis of each algorithm and its performance in a number of phase unwrapping problems C language software that provides a complete implementation of each algorithm Comparative analysis of the algorithms and techniques for evaluating results A discussion of future trends in phase unwrapping research Foreword by former NASA scientist Dr. John C. Curlander Two-Dimensional Phase Unwrapping skillfully integrates concepts, algorithms, software, and examples into a powerful benchmark against which new ideas and algorithms for phase unwrapping can be tested. This unique introduction to a dynamic, rapidly evolving field is essential for professionals and graduate students in SAR interferometry, optical interferometry, adaptive optics, and magnetic resonance imaging (MRI).
Two Dimensional Phase Unwrapping
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Author : Salah Karout
language : en
Publisher:
Release Date : 2007
Two Dimensional Phase Unwrapping written by Salah Karout and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
Multilevel Two Dimensional Phase Unwrapping
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Author : Iddit Shalem
language : en
Publisher:
Release Date : 2007
Multilevel Two Dimensional Phase Unwrapping written by Iddit Shalem and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
Belief Propagation In Two Dimensional Phase Unwrapping
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Author : David Christopher Schultz
language : en
Publisher:
Release Date : 2003
Belief Propagation In Two Dimensional Phase Unwrapping written by David Christopher Schultz and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
Phase Unwrapping Using Discontinuity Optimization
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Author :
language : en
Publisher:
Release Date : 2001
Phase Unwrapping Using Discontinuity Optimization written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
In SAR interferometry, the periodicity of the phase must be removed using two-dimensional phase unwrapping. The goal of the procedure is to find a smooth surface in which large spatial phase differences, called discontinuities, are restricted to places where their presence is reasonable. The pioneering work of Goldstein et al. identified points of local unwrap inconsistency called residues, which must be connected by discontinuities. This paper presents an overview of recent work that treats phase unwrapping as a discrete optimization problem with the constraint that residues must be connected. Several algorithms use heuristic methods to reduce the total number of discontinuities. Constantini has introduced the weighted sum of discontinuity magnitudes as a criterion of unwrap error and shown how algorithms from optimization theory are used to minimize it. Pixels of low quality are given low weight to guide discontinuities away from smooth, high-quality regions. This method is generally robust, but if noise is severe it underestimates the steepness of slopes and the heights of peaks. This problem is mitigated by subtracting (modulo 2[pi]) a smooth estimate of the unwrapped phase from the data, then unwrapping the resulting residual phase. The unwrapped residual is added to the smooth estimate to produce the final unwrapped phase. The estimate can be computed by lowpass filtering of an existing unwrapped phase; this makes possible an iterative algorithm in which the result of each iteration provides the estimate for the next. An example illustrates the results of optimal discontinuity placement and the improvement from unwrapping of the residual phase.
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Author :
language : en
Publisher:
Release Date : 2005
written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Statistical Cost Network Flow Approaches To Two Dimensional Phase Unwrapping For Radar Interferometry
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Author : Curtis W. Chen
language : en
Publisher:
Release Date : 2001
Statistical Cost Network Flow Approaches To Two Dimensional Phase Unwrapping For Radar Interferometry written by Curtis W. Chen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
Spotlight Mode Synthetic Aperture Radar A Signal Processing Approach
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Author : Charles V. J. Jakowatz
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Spotlight Mode Synthetic Aperture Radar A Signal Processing Approach written by Charles V. J. Jakowatz and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Technology & Engineering categories.
Modern airborne and spaceborne imaging radars, known as synthetic aperture radars (SARs), are capable of producing high-quality pictures of the earth's surface while avoiding some of the shortcomings of certain other forms of remote imaging systems. Primarily, radar overcomes the nighttime limitations of optical cameras, and the cloud- cover limitations of both optical and infrared imagers. In addition, because imaging radars use a form of coherent illumination, they can be used in certain special modes such as interferometry, to produce some unique derivative image products that incoherent systems cannot. One such product is a highly accurate digital terrain elevation map (DTEM). The most recent (ca. 1980) version of imaging radar, known as spotlight-mode SAR, can produce imagery with spatial resolution that begins to approach that of remote optical imagers. For all of these reasons, synthetic aperture radar imaging is rapidly becoming a key technology in the world of modern remote sensing. Much of the basic `workings' of synthetic aperture radars is rooted in the concepts of signal processing. Starting with that premise, this book explores in depth the fundamental principles upon which the spotlight mode of SAR imaging is constructed, using almost exclusively the language, concepts, and major building blocks of signal processing. Spotlight-Mode Synthetic Aperture Radar: A Signal Processing Approach is intended for a variety of audiences. Engineers and scientists working in the field of remote sensing but who do not have experience with SAR imaging will find an easy entrance into what can seem at times a very complicated subject. Experienced radar engineers will find that the book describes several modern areas of SAR processing that they might not have explored previously, e.g. interferometric SAR for change detection and terrain elevation mapping, or modern non-parametric approaches to SAR autofocus. Senior undergraduates (primarily in electrical engineering) who have had courses in digital signal and image processing, but who have had no exposure to SAR could find the book useful in a one-semester course as a reference.
Radar Interferometry
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Author : Howard Zebker
language : en
Publisher: Wiley-Interscience
Release Date : 2013-07-22
Radar Interferometry written by Howard Zebker and has been published by Wiley-Interscience this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-07-22 with Technology & Engineering categories.
This book is the definitive text on the application of interferometric radar techniques to the solution of current geophysical problems, using examples and discoveries from the author's world-famous lab at Stanford University, JPL, NASA, and the Department of Defense. It describes the notation and coordinate systems used within the field, the importance of phase measurements, and provides a brief discussion of the parallel argument for point target scatterers. It also introduces the concept of correlation of radar signals from different antennas, fundamental to the performance of any interferometer.
Digital Photoelasticity
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Author : K. Ramesh
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Digital Photoelasticity written by K. Ramesh and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
A straightforward introduction to basic concepts and methodologies for digital photoelasticity, providing a foundation on which future researchers and students can develop their own ideas. The book thus promotes research into the formulation of problems in digital photoelasticity and the application of these techniques to industries. In one volume it provides data acquisition by DIP techniques, its analysis by statistical techniques, and its presentation by computer graphics plus the use of rapid prototyping technologies to speed up the entire process. The book not only presents the various techniques but also provides the relevant time-tested software codes. Exercises designed to support and extend the treatment are found at the end of each chapter.