IEEE Geoscience and Remote Sensing Magazine - June 2019 - 7
changes in the chemistry of the minerals and rocks under investigation.
The next two articles consider aspects of HSI applications that have seen relatively little coverage in recent
surveys. "Longwave Infrared Hyperspectral Imaging" explains the unique aspects of thermal infrared HSI. The
phenomenology of spectral emission and the differences
with respect to the reflective region of the spectrum are
clearly demonstrated, from sensor design to data exploitation. "Hyperspectral Imaging for Military and Security Applications," reviews military and defense-driven applications
of HSI. Its novelty lies in its comprehensive analysis and demonstration of currently available sensing technologies and
advanced processing methodologies, such as subpixel target
and anomaly detection, in the absence of prior information
about the materials and the adversarial environment.
The final three articles focus on advanced processing
techniques. Again, we investigate specific aspects that have
not received attention in recent literature. "Hyperspectral
Band Selection" reviews current hyperspectral band-selection methods and provides a precise taxonomy of the
field. The authors also discuss the challenges and research
directions of hyperspectral band selection. The contribution provides a tutorial on the advantages and drawbacks
of different techniques and the tradeoffs involved when removing spectral redundancy and reducing computational
costs while preserving significant spectral information of
ground objects. The seventh article, "A Review of Change
Detection in Multitemporal Hyperspectral Images," provides a comprehensive overview on change detection in
hyperspectral images and surveys the main change detection techniques available for multitemporal hyperspectral
images. The authors review both widely used methods
and new techniques proposed in the recent literature, discussing and analyzing in detail the basic concepts, categories, open issues, and challenges. The final article, "Deep
Learning for Classification of Hyperspectral Data," reviews
various deep-learning approaches currently proposed for
hyperspectral classification and identifies the problems
and difficulties that arise when implementing deep neural
networks for this task. In particular, the authors address
issues of spatial and spectral resolution, data volume, and
transfer of models from multimedia images to hyperspectral data. In addition, the authors have publicly released a
software toolbox to allow practitioners to reproduce their
comparative experiments.
These eight articles provide a sampling of the issues
emerging in HSI. Compiling this collection highlighted in
our minds the necessity for the remote sensing community
to double its efforts toward facilitating integration among
the scientific, technological, and data-analytic aspects of
HSI. There is a great need for more initiatives not only to col-
JUNE 2019
IEEE GEOSCIENCE AND REMOTE SENSING MAGAZINE
lect but also to calibrate and
validate data from hyperspectral sensors. More interactions
among application scientists,
sensor experts, and data-processing practitioners would
foster significantly enhanced
mission returns from Earth
and planetary, institutional,
and commercial HSI projects.
WHILE FORMERLY THE
DOMAIN OF A RELATIVELY
SMALL GROUP OF SPECIALISTS, IT IS ANTICIPATED HSI
DATA WILL SOON BECOME
AVAILABLE TO A WIDER
RANGE OF SCIENTISTS
AND DATA USERS.
AUTHOR INFORMATION
Mario Parente (mparente@
ecs.umass.edu) received his
B.S. and M.S. (summa cum laude) degrees in telecommunication engineering from the University of Federico II, Naples, Italy, in 2003 and M.S. and Ph.D. degrees in electrical
engineering from Stanford University, California, in 2005
and 2010, respectively. He is currently an associate professor in the Department of Electrical and Computer Engineering at the University of Massachusetts Amherst, where he
is also founder and director of the Remote Hyperspectral
Observers group. His research involves combining physical
models and statistical techniques to address issues in remote sensing of Earth and planetary surfaces. He is a Senior
Member of the IEEE.
John Kerekes (kerekes@cis.rit.edu) received his B.S.,
M.S., and Ph.D. degrees from Purdue University, West Lafayette, Indiana, in 1983, 1986, and 1989, respectively, all
in electrical engineering. Since 2004, he has been with the
Chester F. Carlson Center for Imaging Science, Rochester
Institute of Technology (RIT), New York, first as associate
professor and currently as professor. He also serves as Director of the Digital Imaging and Remote Sensing Laboratory at
RIT. His research interests include the modeling and analysis of remote sensing system performance in pattern recognition and geophysical parameter retrieval applications. He
is a Senior Member of the IEEE.
Rob Heylen (rob.heylen@uzleuven.be) received his M.S.
degree in physics in 2003 from the Katholieke Universiteit
Leuven, Belgium, and his Ph.D. degree in physics in 2008
from the Institute for Theoretical Physics, Katholieke Universiteit Leuven, with research on the statistical mechanics of spin
systems and neural networks on random graphs. In 2009, he
joined the Vision Laboratory, Department of Physics, University of Antwerp, Belgium, as a postdoctoral researcher, where
he focused on hyperspectral image processing, specifically
on the different steps involved in the hyperspectral unmixing processing chain. He is currently a postdoctoral researcher
with the Medical Imaging Research Center, Department of
Nuclear Medicine, Katholieke Universiteit Leuven.
GRS
7
IEEE Geoscience and Remote Sensing Magazine - June 2019
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