<![CDATA[<P>46The Military Engineer l November-December l 2009
rently stable to increasing. Efforts have
been initiated to remove the endan-
gered listing of the gray bat or possibly
downgrade it to the less severe threat-
ened status, which would eliminate
many of the restrictions on Army lands.
However, the U.S. Fish and Wildlife
Service has judged that existing
census techniques are inadequate to
accurately assess population trends
to consider delisting or downlisting the
gray bat.
The USACE Threatened and Endan-
gered Species Research Program, man-
aged at ERDCs Construction Engineer-
ing Research Laboratory, is developing
more accurate and reliable techniques
to conduct censuses of the gray bat.
Thermal infrared imaging equipment
takes heat pictures by measuring
the heat-based radiant energy emitted
from objects, in this case, the gray bat.
A newly-developed technique for digi-
tal image processing of thermal imag-
ery known as Thermal Target Tracker
(T3) is the most reliable way to detect
and track gray bats emerging from ma-
ternity caves during the summer. The
bats are quite warm and can be viewed
against cold backgrounds such as cave
walls or the sky when in ?ight.
The T3 technique involves several
data collection steps followed by au-
tomated digital image processing. The
thermal camera is typically a low-cost,
uncalibrated camera used for surveil-
lance applications. Custom ERDC-de-
veloped software captures the digital
imagery and performs image differenc-
ing between adjoining frames of imag-
ery to accurately count the number of
gray bats emerging from a cave, even
though a ?ight of bats may consist of
hundreds or thousands of individuals.
The U.S. Fish and Wildlife Service
is extremely interested in using the
T3 technique to assess the gray bat
population. At their request, ERDC
researchers conducted a weeklong class
on the technique for 18 wildlife profes-
sionals at Ozark Underground Labora-
tory, Mo.
While the T3 technique works well
counting bats in ?ight, it has many po-
tential other applications as well. ERDC
has demonstrated its use for monitor-
ing traf?c ?ow at an intersection and
lighted drogues moving through a ?ow-
ing hydraulic model. Other potential
applications may include other moving
wildlife studies, such as birds in ?ight,
?sh in test ?umes and even pedestrian
monitoring.
(For more information, contact Bruce
Sabol, bruce.m.sabol@usace.army.mil)
Submit Technology News items with
high-resolution (300-dpi) electronic im-
ages, to Jill M. Jackson, M.SAME, at tech-
news@same.org.
Technology News (continued)
The Infrastructure Security Partnership 2009 Annual
Infrastructure & Regional Resilience Conference
Dec. 9-10, 2009 • Gaylord Texan Resort & Convention Center
on Lake Grapevine • Grapevine, Texas
With an information-packed agenda of workshops, training courses and networking
events the TISP 2009 Annual Infrastructure & Regional Resilience (AIRR) Conference is the
perfect event to get the timely information you need. Topics will include:
TISP 2009 AIRR Conference is a must attend event for critical infrastructure resilience leaders,
infrastructure owners and operators, state and local homeland security of?cials, policy makers,
response and recovery coordinators, and other industry professionals.
Register Today
• Successful Regional Strategies to CIP
• Interdependence of Various Critical Infrastructure Assets and Industries
• Resilience of Transportation, Energy, Dams & Levees, Cyber Infrastructure and IT Systems
• Local, Regional and National Goals for Safety, Security, and Resilience
• Latest Emergency Operations and Management Solutions…and more.
To register online for the TISP 2009 Annual Infrastructure
& Regional Resilience Conference, go to www.tisp.org.
www.tisp.org
Online Registration closes Nov. 27, 2009</p>
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