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智能计算与遥感Computational Intelligence for Remote Sensing;国外高光谱图像处理专著;高光谱图像处理;高光谱分类;
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Manuel Gra˜na
Richard J. Duro
(Eds.)
Computational Intel lige nce
for Remote Sensing
123
Manuel Gra˜na
Universidad Pais Vasco
Facultad de Inform´atica
20018 San Sebastian
Spain
e-mail: manuel.grana@ehu.es
Richard Duro
Universidad de A Coru˜na
Grupo Integrado de Ingenier´ıa
Escuela Polit´ecnica Superior
c/ Mendiz´abal s/n
15403 Ferrol (A Coru˜na)
Spain
e-mail: r ichard@udc.es
ISBN 978-3-540-79352-6 e-ISBN 978-3-540-79353-3
DOI 10.1007/978-3-540-79353-3
Studies in Computational Intelligence ISSN 1860-949X
Library of Congress Control Number: 2008925271
c
2008 Springer-Verlag Berlin Heidelberg
This work is subject to copyright. All rights are reserved, whether the whole or part of the material is
concerned, specifically the rights of tra nslation, reprinting, reuse of illustrations, recitation, broadcasting,
reproduction on microfilm or in any other way, and storage in data banks. Duplication of this publication
or parts thereof is permitted only under the provisions of the German Copy right Law of S eptember 9, 1965,
in its current version, and permission for use must always be obtained from Springer-Verlag.Violations are
liable to prosecution under the German Copyright Law.
The use of general descriptive names, registered names, trademarks, etc. in this publication does not imply,
even in the absence of a specific statement, that such names are exempt from the relevant prot e ctive laws
and regulations and therefore free for general use.
Typeset & Cover Design: Scientific Publishing Services Pvt. Ltd., Chennai, India.
Printed on acid-free paper
987654321
springer.com
Preface
This book is a composition of diverse points of view regarding the application of
Computational Intelligence techniques and methods into Remote Sensing data
and problems. It is the general consensus that classification, and related data
processing, and global optimization methods are the main topics of Computa-
tional Intelligence. Global random optimization algorithms appear in this book,
such as the Simulated Annealing in chapter 6 and the Genetic Algorithms pro-
posed in chapters 3 and 9. Much of the contents of the book are devoted to image
segmentation and recognition, using diverse tools from regions of Computational
Intelligence, ranging from Artificial Neural Networks to Markov Random Field
modelling. However, there are some fringe topics, such the parallel implemen-
tation of some algorithms or the image watermarking that make evident that
the frontiers between Computational Intelligence and neighboring computational
disciplines are blurred and the fences run low and full of holes in many places.
The book starts with a review of the current designs of hyperspectral sensors,
more appropriately named Imaging Spectrometers. Knowing the shortcomings
and advantages of the diverse designs may condition the results on some appli-
cations of Computational Intelligence algorithms to the processing and under-
standing of them Remote Sensing images produced by these sensors. Then the
book contents moves into basic signal processing techniques such as compression
and watermarking applied to remote sensing images. With the huge amount of
remote sensing information and the increasing rate at which it is being produced,
it seems only natural that compression techniques will leap into a prominent role
in the near future, overcoming the resistances of the users against uncontrolled
manipulation of “their” data. Watermarking is the way to address issues of own-
ership authentication in digital contents. The enormous volume of information
asks also for advanced information management systems, able to provide intel-
ligent query process, as well as to provide for cooperative manipulation of the
images through autonomously provided web services, streamed through special
web portals, such as the one provided by the European Space Agency (ESA).
The main contents of the book are devoted to image analysis and efficient (par-
allel) implementations of such analysis techniques. The processes include image
VI Preface
segmentation, change detection, endmember extraction for spectral unmixing,
and feature extraction. Diverse kinds of ArtificialNeuralNetworks, Mathemati-
cal Morphology and Markov Random Fields are applied to these tasks. The kind
of images are mostly multispectral-hyperspectral images, with some examples of
processing Synthetic Aperture Radar images, whose appeal lies in its insensitiv-
ity to atmospheric conditions. Two specific applications stand out. One is forest
fire detection and prevention, the other is quality inspection using hyperspectral
images.
Chapter 1 provides a review of current Imaging Spectrometer designs. They
focus on the spectral unit. Three main classes are identified in the literature:
filtering, dispersive and interferometric. The ones in the first class only transmit
a narrow spectral band to each detector pixel. In dispersive imaging spectrome-
ters the directions of light propagation change by diffraction, material dispersion
or both as a continuous function of wavelength. Interferometric imaging spec-
trometers divide a light beam into two, delay them and recombine them in the
image plane. The spectral information is then obtained by performing a Fourier
transform.
Chapter 2 reviews the state of the art in the application of Data Compression
techniques to Remote Sensing images, specially in the case of Hyperspectral im-
ages. Lossless, Near-Lossless and Lossy compression techniques are reviewed and
evaluated on well known benchmark images. The chapter includes summaries of
pertinent materials such as Wavelet Transform, KLT, Coding and Quantization
algorithms, compression quality measures, etc.
Chapter 3 formulates the watermarking of digital images as a multi-objective
optimization problem and proposes a Genetic Algorithm to solve it. The two
conflicting objectives are the robustness of the watermark against manipulations
(attacks) of the watermarked image and the low distortion of the watermarked
image. Watermarking is proposed as adding the image mark DCT coefficients to
some of the watermarked image DCT coefficients. In the case of hyperspectral
images the DCT is performed independently on each band image. The careful
definition of the robustness and distortion fitness functions to avoid flat fitness
landscapes and to obtain fast fitness evaluations is described.
Chapter 4 refers the current efforts at the European Space Agency to provide
Service Support Environments (SSE) that: (1) Simplify the access to multiple
sources of Earth Observation (EO) data. (2) Facilitate the extraction of infor-
mation from EO data. (3) Reduce the barrier for the definition and prototyping
of EO Services. The objective of the chapter is to provide an overview of the
systems which can be put in place to support various kinds of user needs and
to show how they relate each other, as well as how they relate with higher level
user requirements. The chapter reviews several apparently un-related research
topics: service oriented architecture, service publishing, service orchestration,
knowledge based information mining, information and feature extraction, and
content based information retrieval. The authors stress their relative roles and
integration into a global web-based SSE for EO data.
Preface VII
Chapter 5 reviews some general ideas about Content Based Image Retrieval
(CBIR) Systems emphasizing the recent developments regarding Remote Sensing
image databases. The authors introduce an approach for the CBIR in collections
of hyperspectral images based on the spectral information given by the set of
endmembers induced from each image data. A similarity function is defined and
some experimental results on a collection of synthetic images are given.
Chapter 6 considers an specific problem, that of sensor deployment when try-
ing to build up a wireless sensor network to monitor a patch of land. The Martian
exploration is the metaphorical site to illustrate the problem. They propose a
formal statement of the problem in the deterministic case (all node positions
can be determined). This leads to the formulation of an objective function that
can be easily seen to multiple local optima, and to be discontinuous due to the
connectivity constraint. Simulated Annealing is applied to obtain (good approx-
imations to) the global optimum.
Chapters 7 and 8 are devoted to the study of the efficient parallel implemen-
tation of segmentation and classification algorithms applied to hyperspectral
images. They include good reviews of the state of the art of the application of
mathematical morphology to spatial-spectral analysis of hyperspectral images.
Chapter 7 focuses on the parallel implementation of morphological operators and
morphology derived techniques for spectral unmixing, feature extraction, unsu-
pervised and supervised classification, etc. Chapter 8 proposes parallel imple-
mentations of Multilayer Perceptron and compares with the morphology based
classification algorithms. Specific experiments designed to evaluate the influence
of the sample partitioning on the training convergence were carried out by the
authors.
Chapter 9 deals with the detection and spatial localization (positioning) of
rather elusive but also conspicuous phenomena: the line-shaped weather systems
and spiral tropical cyclones. The works are performed on radar data and satellite
images and tested on real life conditions. The main search engine are Genetic
Algorithms based on a parametric description of the weather system. Kalman
filters are used as post-processing techniques to smooth the results of tracking.
Chaper 10 proposes a Wavelet Transform procedure performed on the HSV
color space to obtain the primitive features for image mining. A systematic
method for decomposition level selection based on the frequency content of each
decomposition level image.
Chapter 11 reviews the application of Artificial Neural Networks to land cover
classification in remote sensing images and reports results on change detection
using the Elmann network trained on sequences of images and of Synthetic
Aperture Radar (SAR) data.
Chapter 12 is devoted to the problem of Forest Fires management. It describes
two case studies of operational and autonomous processing chains in place for
supporting forest fires management in Europe, focusing on the prevention and
damage assessment phases of the wildfire emergency cycle, showing how com-
putational intelligence can be effectively used for: Fire risk estimation and Burn
scars mapping. The first fusing risk information and in-situ monitoring. The sec-
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