Dr. Grant R. Gerhart Profile

Dr. Grant R. Gerhart

Visiting Research Scientist

SPIE Involvement:

Track Chair | Editor | Author

Publications (82)

Proceedings Article | 24 April 2010 Paper

White-light Sagnac interferometer for snapshot polarimetric and multispectral imaging

Michael Kudenov, Matthew E. L. Jungwirth, Eustace Dereniak, Grant Gerhart

Proceedings Volume 7672, 767209 (2010) https://doi.org/10.1117/12.849831

KEYWORDS: Diffraction gratings, Multispectral imaging, Diffraction, Sagnac interferometers, Polarization, Polarimetry, Staring arrays, Reflectivity, Mirrors, Modulation

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Proceedings Article | 25 September 2009 Paper

A new approach for determining reliability of unmanned vehicles network using fuzzy logic

Adam Mustapha, Harpreet Singh, Kassem Saab, Suresh Rai, Grant Gerhart

Proceedings Volume 7480, 74800D (2009) https://doi.org/10.1117/12.830931

KEYWORDS: Reliability, Fuzzy logic, Unmanned ground vehicles, Unmanned vehicles, Computer engineering, Network security, Defense and security, Computer networks, Promethium, Samarium

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Proceedings Article | 25 September 2009 Paper

Simulation of an algorithm for determining the reliability of unmanned ground vehicle networks

Harpreet Singh, Arati Dixit, Kassem Saab, Grant Gerhart

Proceedings Volume 7480, 74800F (2009) https://doi.org/10.1117/12.830792

KEYWORDS: Reliability, Fuzzy logic, Unmanned vehicles, Robots, Unmanned ground vehicles, Binary data, Algorithm development, Telecommunications, Software development, Computer simulations

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Proceedings Article | 28 August 2009 Paper

Infrared Stokes imaging polarimeter using microbolometers

Michael Kudenov, J. Larry Pezzaniti, Eustace Dereniak, Grant Gerhart

Proceedings Volume 7419, 741908 (2009) https://doi.org/10.1117/12.828047

KEYWORDS: Polarimetry, Calibration, Polarization, Microbolometers, Sensors, Staring arrays, Infrared radiation, Infrared imaging, Long wavelength infrared, Imaging systems

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SPIE Journal Paper | 1 June 2009

Microbolometer-infrared imaging Stokes polarimeter

Michael Kudenov, J. Larry Pezzaniti, Grant Gerhart

OE, Vol. 48, Issue 06, 063201, (June 2009) https://doi.org/10.1117/12.10.1117/1.3156844

KEYWORDS: Polarimetry, Polarization, Calibration, Sensors, Microbolometers, Optical engineering, Staring arrays, Error analysis, Black bodies, Imaging systems

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Proceedings Article | 30 April 2009 Paper

On software implementation of reliability of unmanned ground vehicles

Arati Dixit, Kassem Saab, Harpreet Singh, Adam Mustapha, Grant Gerhart

Proceedings Volume 7332, 73321Z (2009) https://doi.org/10.1117/12.818925

KEYWORDS: Reliability, Fuzzy logic, Unmanned vehicles, Unmanned ground vehicles, Failure analysis, MATLAB, Binary data, Defense and security, Visualization, Nanoimprint lithography

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Proceedings Article | 30 April 2009 Paper

Complexity of robotic sensor networks

Adam Mustapha, Harpreet Singh, Arati Dixit, Kassem Saab, Grant Gerhart

Proceedings Volume 7332, 733208 (2009) https://doi.org/10.1117/12.819370

KEYWORDS: Fuzzy logic, Sensor networks, Unmanned ground vehicles, Sensors, Robotics, Calcium, MATLAB, Reliability, Intelligent sensors, Telecommunications

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Proceedings Article | 16 October 2008 Paper

On a new approach to reduction of data for ANFIS application to unmanned robotic vehicles

Harpreet Singh, Adam Mustapha, Shashank Kamthan, Arati Dixit, Deok Nam, Gary Witus, Grant Gerhart

Proceedings Volume 7112, 711213 (2008) https://doi.org/10.1117/12.802590

KEYWORDS: Factor analysis, Sensors, Fuzzy logic, Classification systems, Statistical analysis, Infrared sensors, Fuzzy systems, Robotics, Unmanned vehicles, Algorithm development

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Proceedings Article | 16 October 2008 Paper

Fuzzy system reliability computation of the convoy of unmanned intelligent vehicles

Harpreet Singh, Arati Dixit, Adam Mustapha, Grant Gerhart

Proceedings Volume 7112, 71120Z (2008) https://doi.org/10.1117/12.800419

KEYWORDS: Reliability, Fuzzy logic, Unmanned vehicles, Fuzzy systems, Data modeling, Computing systems, Telecommunications, Defense technologies, Computer simulations, Computer networks

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Proceedings Article | 27 August 2008 Paper

Computed tomographic imaging spectropolarimeter characterization

Corrie Vandervlugt, Robert Sampson, Julia Craven, Eustace Dereniak, Grant Gerhart

Proceedings Volume 7086, 708604 (2008) https://doi.org/10.1117/12.795427

KEYWORDS: Polarization, Modulation, Tomography, Light emitting diodes, Wave plates, Data acquisition, Polarizers, Specular reflections, Spectroscopy, Copper

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Proceedings Article | 25 April 2008 Paper

Modeling and simulation of reliability of unmanned intelligent vehicles

Harpreet Singh, Arati Dixit, Adam Mustapha, Kuldip Singh, K. Aggarwal, Grant Gerhart

Proceedings Volume 6962, 696218 (2008) https://doi.org/10.1117/12.771515

KEYWORDS: Unmanned ground vehicles, Computer engineering, Data processing, MATLAB, Fuzzy systems, Modeling and simulation, Failure analysis, Unmanned vehicles, Fuzzy logic, Reliability

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Proceedings Article | 2 April 2008 Paper

2-Cam LWIR imaging Stokes polarimeter

Michael Kudenov, Eustace Dereniak, Larry Pezzaniti, Grant Gerhart

Proceedings Volume 6972, 69720K (2008) https://doi.org/10.1117/12.784796

KEYWORDS: Polarimetry, Calibration, Diffraction, Optical testing, Mineralogy, Long wavelength infrared, Wave plates, Diffraction gratings, Polarization, Reflection

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SPIE Journal Paper | 1 January 2008

High-speed imaging chopper polarimetry

Roy Matchko, Grant Gerhart

OE, Vol. 47, Issue 01, 016001, (January 2008) https://doi.org/10.1117/12.10.1117/1.2829767

KEYWORDS: Polarization, Polarimetry, Optical filters, Cameras, Wave plates, Linear polarizers, Video, Calibration, High speed imaging, Imaging systems

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Proceedings Article | 15 October 2007 Paper

On the reliability of a convoy of unmanned intelligent vehicles and their collaboration and coordination

Harpreet Singh, Lei Hua, Adam Mustapha, Arati Dixit, Grant Gerhart, Gurdeep Hura

Proceedings Volume 6736, 673606 (2007) https://doi.org/10.1117/12.740906

KEYWORDS: Reliability, Fuzzy logic, Information operations, Unmanned vehicles, Defense and security, Sensors, Sensor networks, Fuzzy systems, Intelligence systems, Intelligent sensors

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Proceedings Article | 5 October 2007 Paper

Simulation of convoy of unmanned vehicles using agent based modeling

Sharad Sharma, Harpreet Singh, G. Gerhart

Proceedings Volume 6736, 673605 (2007) https://doi.org/10.1117/12.740530

KEYWORDS: Unmanned vehicles, Sensors, Ultraviolet radiation, Computer simulations, Collision avoidance, Defense and security, Intelligent sensors, Systems modeling, Java, Environmental sensing

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Proceedings Article | 5 October 2007 Paper

Sensor deployment on unmanned ground vehicles

Grant Gerhart, Gary Witus

Proceedings Volume 6736, 673603 (2007) https://doi.org/10.1117/12.736109

KEYWORDS: Sensors, Ultraviolet radiation, Unattended ground sensors, Inspection, Surveillance, Robots, Unmanned ground vehicles, Navigation systems, Dismounted soldiers, Environmental sensing

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Proceedings Article | 12 September 2007 Paper

Visible imaging spectro-polarimeter

Corrie Vandervlugt, Nathan Hagen, Robert Sampson, Eustace Dereniak, Grant Gerhart

Proceedings Volume 6661, 666104 (2007) https://doi.org/10.1117/12.734242

KEYWORDS: Polarization, Modulation, Wave plates, Visible radiation, Spectroscopy, Staring arrays, Computed tomography, Computer generated holography, Reconstruction algorithms, Calibration

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Proceedings Article | 5 October 2006 Paper

A software design approach for heterogeneous systems of unattended sensors, unmanned vehicles, and monitoring stations

William Smuda, Grant Gerhart, Man-Tak Shing, Mikhail Auguston

Proceedings Volume 6394, 639406 (2006) https://doi.org/10.1117/12.693035

KEYWORDS: Systems modeling, Software engineering, Sensors, Unattended sensors, Robots, Interfaces, Robotics, Robotic systems, Prototyping, Software development

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Proceedings Article | 7 September 2006 Paper

Polarization acquisition using a commercial Fourier transform spectrometer in the MWIR

Michael Kudenov, Nathan Hagen, Haitao Luo, Eustace Dereniak, Shawn Robertson, Leonardo Montilla, Tom Vo, Justina Tam, Julia Nichols, Grant Gerhart

Proceedings Volume 6295, 62950A (2006) https://doi.org/10.1117/12.688401

KEYWORDS: Fourier transforms, Wave plates, Mid-IR, Systems modeling, Data modeling, Error analysis, Calibration, Spectroscopy, Crystals, Interferometers

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SPIE Journal Paper | 1 September 2006

Rapid 4-Stokes parameter determination using a motorized rotating retarder

Roy Matchko, Grant Gerhart

OE, Vol. 45, Issue 09, 098002, (September 2006) https://doi.org/10.1117/12.10.1117/1.2345180

KEYWORDS: Wave plates, Polarization, Polarimetry, Linear polarizers, Cameras, Image registration, Data acquisition, RGB color model, Digital cameras, Optical filters

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SPIE Journal Paper | 1 July 2006

Robotic three-dimensional imaging system for under-vehicle inspection

Sreenivas Sukumar, David Page, Andrei Gribok, Andreas Koschan, Mongi Abidi, David Gorsich, Grant Gerhart

JEI, Vol. 15, Issue 03, 033008, (July 2006) https://doi.org/10.1117/12.10.1117/1.2238565

KEYWORDS: 3D modeling, Robotics, 3D image processing, Imaging systems, Inspection, Sensors, Computer aided design, Data modeling, Solid modeling, Visualization

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Proceedings Article | 12 May 2006 Paper

Finite state modeling of mobile robots for complexity determination

Rahul Ranjan, Harpreet Singh, Anuj Awasthi, William Smuda, Grant Gerhart

Proceedings Volume 6230, 62302E (2006) https://doi.org/10.1117/12.667205

KEYWORDS: Software development, Mobile robots, Data modeling, Sensors, Infrared sensors, Switching, Robotics, Embedded systems, Magnetism, Computer architecture

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Proceedings Article | 27 October 2005 Paper

Small UGV platforms for unattended sensors

Bill Smuda, Grant Gerhart

Proceedings Volume 5986, 59860E (2005) https://doi.org/10.1117/12.634485

KEYWORDS: Sensors, Robots, Robotics, Sensor networks, Inspection, Sensor technology, Unattended sensors, Improvised explosive devices, Infrared sensors, Explosives

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Proceedings Article | 27 October 2005 Paper

Visual tracking for mobile robot pursuit

Gary Witus, Robert Karlsen, James Overholt, Grant Gerhart

Proceedings Volume 5986, 59860F (2005) https://doi.org/10.1117/12.634478

KEYWORDS: Optical tracking, Automatic tracking, Control systems, Navigation systems, Visualization, Detection and tracking algorithms, Mobile robots, Algorithm development, Cameras, Visual process modeling

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Proceedings Article | 27 May 2005 Paper

Deploying the ODIS robot in Iraq and Afghanistan

Bill Smuda, Edward Schoenherr, Henry Andrusz, Grant Gerhart

Proceedings Volume 5804, (2005) https://doi.org/10.1117/12.606205

KEYWORDS: Inspection, Antennas, Robotics, Roads, Cameras, Robotic systems, Improvised explosive devices, Unmanned ground vehicles, Video, Land mines

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Proceedings Article | 27 May 2005 Paper

Surface shape description of 3D data from under vehicle inspection robot

Sreenivas Sukumar, David Page, Andrei Gribok, Andreas Koschan, Mongi Abidi, David Gorsich, Grant Gerhart

Proceedings Volume 5804, (2005) https://doi.org/10.1117/12.602930

KEYWORDS: 3D modeling, Inspection, Solid modeling, Computer aided design, Sensors, Data modeling, Laser scanners, Shape analysis, Robotics, Image segmentation

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Proceedings Article | 27 May 2005 Paper

Forecasting off-road trafficability from terrain appearance

Gary Witus, Robert Karlsen, James Overholt, Grant Gerhart

Proceedings Volume 5804, (2005) https://doi.org/10.1117/12.606393

KEYWORDS: Roads, Visualization, Data modeling, Resistance, Image classification, Velocity measurements, Instrument modeling, Statistical analysis, Unmanned ground vehicles, Sensors

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SPIE Journal Paper | 1 February 2005

Polarization azimuth angle in daylight scenes

Roy Matchko, Grant Gerhart

OE, Vol. 44, Issue 02, 028001, (February 2005) https://doi.org/10.1117/12.10.1117/1.1847656

KEYWORDS: Polarization, Cameras, Sun, Rayleigh scattering, Scattering, Optical engineering, Light scattering, Digital cameras, Specular reflections, Optical spheres

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SPIE Journal Paper | 1 February 2005

Polarization measurements using a commercial off-the-shelf digital camera

Roy Matchko, Grant Gerhart

OE, Vol. 44, Issue 02, 023604, (February 2005) https://doi.org/10.1117/12.10.1117/1.1847655

KEYWORDS: Polarization, RGB color model, Wave plates, Digital cameras, Cameras, Calibration, Commercial off the shelf technology, Quartz, Poincaré sphere, Optical filters

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Proceedings Article | 2 September 2004 Paper

The TACOM-USU intelligent mobility program

Kevin Moore, Grant Gerhart

Proceedings Volume 5422, (2004) https://doi.org/10.1117/12.541787

KEYWORDS: Robots, Inspection, Sensors, Intelligence systems, Control systems, Robotics, System integration, Cameras, Robotic systems, Mobile robots

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Proceedings Article | 2 September 2004 Paper

Robotics for port security

William Smuda, Lonnie Freiburger, Grant Gerhart, Lawrence Mallon

Proceedings Volume 5422, (2004) https://doi.org/10.1117/12.553012

KEYWORDS: Robots, Inspection, Robotics, Sensors, Mirrors, Homeland security, Prototyping, Visualization, Defense and security, Transportation security

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Proceedings Article | 2 September 2004 Paper

Development of a virtual mobile robot laboratory

Harpreet Singh, Hardarshan Singh, Jyoti Raj, Grant Gerhart

Proceedings Volume 5422, (2004) https://doi.org/10.1117/12.548924

KEYWORDS: Robots, Mobile robots, Logic, Fuzzy logic, Simulink, Robotics, Sensors, Mathematical modeling, MATLAB, Virtual reality

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Proceedings Article | 2 September 2004 Paper

SAFER vehicle inspection: a multimodal robotic sensing platform

David Page, Yohan Fougerolle, Andreas Koschan, Andrei Gribok, Mongi Abidi, David Gorsich, Grant Gerhart

Proceedings Volume 5422, (2004) https://doi.org/10.1117/12.542808

KEYWORDS: Sensors, Image segmentation, Imaging systems, Data modeling, Inspection, Robotics, Cameras, 3D modeling, Scanners, Algorithm development

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Proceedings Article | 17 July 2002 Paper

Autonomy and manual operation in a small robotic system for under-vehicle inspections at security checkpoints

William Smuda, Paul Muench, Grant Gerhart, Kevin Moore

Proceedings Volume 4715, (2002) https://doi.org/10.1117/12.474445

KEYWORDS: Robots, Inspection, Cameras, Sensors, Robotic systems, Robotics, Visualization, Mirrors, Video, Prototyping

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Proceedings Article | 17 July 2002 Paper

Defining proprioceptive behaviors for autonomous mobile robots

James Overholt, Greg Hudas, Grant Gerhart

Proceedings Volume 4715, (2002) https://doi.org/10.1117/12.474460

KEYWORDS: Kinematics, Analytical research, Fuzzy systems, Physiology, Control systems, Unmanned ground vehicles, Computer programming, Robotics, Mobile robots, Sensors

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SPIE Journal Paper | 1 December 2001

ABCs of foveal vision

Roy Matchko, Grant Gerhart

OE, Vol. 40, Issue 12, (December 2001) https://doi.org/10.1117/12.10.1117/1.1416696

KEYWORDS: Target detection, Fourier transforms, Data modeling, Performance modeling, Visual process modeling, Optical engineering, Visual system, Human vision and color perception, Target acquisition, Eye

Proceedings Article | 22 October 2001 Paper

Consequences of preprocessing feature data for support vector machines

David Gorsich, Robert Karlsen, Grant Gerhart

Proceedings Volume 4379, (2001) https://doi.org/10.1117/12.445383

KEYWORDS: Image classification, Stochastic processes, Matrices, Detection and tracking algorithms, Computer programming, Linear filtering, Nonlinear filtering, Feature extraction, Computer simulations, MATLAB

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Proceedings Article | 20 September 2001 Paper

Preliminary investigation into the use of stereo illumination to enhance mobile robot terrain perception

Gary Witus, Robert Karlsen, David Gorsich, Grant Gerhart

Proceedings Volume 4364, (2001) https://doi.org/10.1117/12.439988

KEYWORDS: Cameras, Stereoscopy, Light sources and illumination, Light sources, Mobile robots, Image processing, Stereo vision systems, Sensors, 3D modeling, Calibration

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Proceedings Article | 20 September 2001 Paper

TARDEC's robotics laboratory

David Gorsich, Grant Gerhart, Paul Muench

Proceedings Volume 4364, (2001) https://doi.org/10.1117/12.439992

KEYWORDS: Robotics, Robotic systems, Modeling and simulation, Control systems, Computer simulations, Fluorescence correlation spectroscopy, Intelligence systems, Device simulation, Prototyping, MATLAB

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SPIE Journal Paper | 1 September 2001

Contrast model for three-dimensional vehicles in natural lighting and search performance analysis

Gary Witus, Grant Gerhart, R. Darin Ellis

OE, Vol. 40, Issue 09, (September 2001) https://doi.org/10.1117/12.10.1117/1.1389867

KEYWORDS: 3D modeling, Target detection, 3D acquisition, Data modeling, Received signal strength, Error analysis, 3D image processing, Performance modeling, Calibration, Visual process modeling

Proceedings Article | 17 August 2000 Paper

Support vector machines and target classification

Robert Karlsen, David Gorsich, Grant Gerhart

Proceedings Volume 4050, (2000) https://doi.org/10.1117/12.395553

KEYWORDS: Detection and tracking algorithms, Neural networks, Synthetic aperture radar, Evolutionary algorithms, Feature extraction, Optical character recognition, Computer programming, Image classification, Image filtering, Image processing

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Proceedings Article | 10 July 2000 Paper

Off-road vehicle locomotion using Bekker's model

Grant Gerhart, Sean Laughery, Richard Goetz

Proceedings Volume 4024, (2000) https://doi.org/10.1117/12.391622

KEYWORDS: Unmanned systems, Sensors, Commercial off the shelf technology, Mechanics, Motion models, Samarium, Distortion, Soil science, Robotics, Resistance

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SPIE Journal Paper | 1 March 2000

Target classification via support vector machines

Robert Karlsen, David Gorsich, Grant Gerhart

OE, Vol. 39, Issue 03, (March 2000) https://doi.org/10.1117/12.10.1117/1.602417

KEYWORDS: Neural networks, Evolutionary algorithms, Detection and tracking algorithms, Feature extraction, Image classification, Optical engineering, MATLAB, Error analysis, Optimization (mathematics), Neurons

Proceedings Article | 22 July 1999 Paper

Intelligent mobility for robotic vehicles in the army after next

Grant Gerhart, Richard Goetz, David Gorsich

Proceedings Volume 3693, (1999) https://doi.org/10.1117/12.354441

KEYWORDS: Robotics, Sensors, Control systems, Infrared signatures, Visualization, Interfaces, Data communications, Adaptive control, Computer simulations, Algorithm development

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Proceedings Article | 14 July 1999 Paper

Internal texture or object boundary? Disambiguating the interpretation of spatial modulation

Gary Witus, R. Darin Ellis, Grant Gerhart, Robert Karlsen

Proceedings Volume 3699, (1999) https://doi.org/10.1117/12.352941

KEYWORDS: Image segmentation, Modulation, Image processing algorithms and systems, Visualization, Bandpass filters, Spatial filters, Visual process modeling, Image processing, Spatial frequencies, Linear filtering

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Proceedings Article | 14 July 1999 Paper

Target versus background characterization: second-generation wavelets and support vector machines

David Gorsich, Robert Karlsen, Grant Gerhart, Marc Genton

Proceedings Volume 3699, (1999) https://doi.org/10.1117/12.352950

KEYWORDS: Wavelets, Wavelet transforms, Target detection, Neural networks, Stochastic processes, Image classification, Matrices, Image processing, Visual process modeling, Computer programming

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SPIE Journal Paper | 1 March 1999

Parametric analysis of the Blackwell-McCready Data

Roy Matchko, Grant Gerhart

OE, Vol. 38, Issue 03, (March 1999) https://doi.org/10.1117/12.10.1117/1.602041

Proceedings Article | 12 August 1998 Paper

U.S. Army TARDEC R&D program on intelligent subsystems for enhanced mobility

Gary Witus, Grant Gerhart, Richard Goetz

Proceedings Volume 3366, (1998) https://doi.org/10.1117/12.317551

KEYWORDS: Sensors, Robotics, Control systems, Computer simulations, System integration, Data modeling, Navigation systems, Packaging, Robotic systems, Feedback control

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Proceedings Article | 7 July 1998 Paper

Adaptive wavelet-based contrast enhancement of IR imagery

Sridhar Srinivasan, Robert Karlsen, Grant Gerhart

Proceedings Volume 3375, (1998) https://doi.org/10.1117/12.327166

KEYWORDS: Image enhancement, Fractal analysis, Wavelet transforms, Image quality, Motion models, Wavelets, Detection and tracking algorithms, Image processing, Feature extraction, Cameras

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Proceedings Article | 7 July 1998 Paper

Average search time for ground-vehicle target detectability

Richard Goetz, Grant Gerhart, Roy Matchko

Proceedings Volume 3375, (1998) https://doi.org/10.1117/12.327152

KEYWORDS: Target detection, Eye, Visual process modeling, Eye models, Optical components, Target acquisition, Visualization, Instrument modeling, Systems modeling, Analytical research

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Proceedings Article | 7 July 1998 Paper

Multiresolution motion estimation and target detection

Robert Karlsen, David Gorsich, Grant Gerhart

Proceedings Volume 3375, (1998) https://doi.org/10.1117/12.327150

KEYWORDS: Optical flow, Neural networks, Target detection, Motion estimation, Motion detection, Neurons, Detection and tracking algorithms, Image segmentation, Visualization, Linear filtering

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SPIE Journal Paper | 1 July 1998

Parametric analysis of the Blackwell-McCready data

Roy Matchko, Grant Gerhart

OE, Vol. 37, Issue 07, (July 1998) https://doi.org/10.1117/12.10.1117/1.601724

KEYWORDS: Target detection, Target acquisition, Data modeling, Visualization, Visual process modeling, Optical engineering, Performance modeling, Visual system, Visibility, Atmospheric modeling

SPIE Journal Paper | 1 July 1998

Target detection for low ambient backgrounds

Roy Matchko, Grant Gerhart

OE, Vol. 37, Issue 07, (July 1998) https://doi.org/10.1117/12.10.1117/1.601707

KEYWORDS: Target detection, Sun, Eye, Visualization, Light scattering, Target acquisition, Optical engineering, Scattering, Visual process modeling, Rayleigh scattering

SPIE Journal Paper | 1 July 1998 Open Access

Guest Editorial: Special Section on Advances in Target Acquisition Modeling

Thomas Meitzler, Grant Gerhart, Harpreet Singh

OE, Vol. 37, Issue 07, (July 1998) https://doi.org/10.1117/12.10.1117/1.601717

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SPIE Journal Paper | 1 January 1998

Predicting the probability of target detection in static infrared and visual scenes using the fuzzy logic approach

Thomas Meitzler, Eui Sohn, Grant Gerhart, Harpreet Singh, Labib Arefeh

OE, Vol. 37, Issue 01, (January 1998) https://doi.org/10.1117/12.10.1117/1.601849

KEYWORDS: Fuzzy logic, Palladium, Visualization, Target detection, Visual process modeling, Infrared imaging, Target acquisition, Systems modeling, Data modeling, Electro optical modeling

Proceedings Article | 20 June 1997 Paper

Multiresolution-based motion estimation

David Gorsich, Robert Karlsen, Grant Gerhart

Proceedings Volume 3062, (1997) https://doi.org/10.1117/12.276684

KEYWORDS: Optical flow, Target detection, Expectation maximization algorithms, Motion estimation, Detection and tracking algorithms, Image processing, Error analysis, Motion detection, Linear filtering, Algorithm development

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Proceedings Article | 20 June 1997 Paper

Background characterization and visualization based on visual neurophysiology

Gary Witus, Paul Gottschalk, Mitchell Cohen, Grant Gerhart, Robert Karlsen, Thomas Meitzler, Richard Goetz, Eui Sohn, Darryl Bryk

Proceedings Volume 3062, (1997) https://doi.org/10.1117/12.276679

KEYWORDS: Visualization, Visual process modeling, Linear filtering, Bandpass filters, Detection and tracking algorithms, Modulation, Spatial filters, Image filtering, Visual analytics, Image processing

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Proceedings Article | 20 June 1997 Paper

Diurnal ambient luminance near dawn and dusk

Grant Gerhart, Roy Matchko

Proceedings Volume 3062, (1997) https://doi.org/10.1117/12.276683

KEYWORDS: Sun, Eye, Phase modulation, Light scattering, Target detection, Target acquisition, Visualization, Data modeling, Rayleigh scattering, Scattering

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Proceedings Article | 16 June 1997 Paper

Computing the probability of target detection in infrared and visual scenes using the fuzzy logic approach

Thomas Meitzler, Harpreet Singh, Labib Arefeh, Grant Gerhart, Eui Sohn

Proceedings Volume 3063, (1997) https://doi.org/10.1117/12.276071

KEYWORDS: Fuzzy logic, Palladium, Visualization, Target detection, Data modeling, Visual process modeling, Systems modeling, Infrared radiation, Target acquisition, Electro optical modeling

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SPIE Journal Paper | 1 December 1996

Fuzzy logic approach for computing the probability of target detection in cluttered scenes

Thomas Meitzler, Labib Arafeh, Harpreet Singh, Grant Gerhart

OE, Vol. 35, Issue 12, (December 1996) https://doi.org/10.1117/12.10.1117/1.601081

KEYWORDS: Fuzzy logic, Electro optical modeling, Data modeling, Target detection, Systems modeling, Visual process modeling, Target acquisition, Visualization, Fuzzy systems, Optical engineering

Proceedings Article | 23 October 1996 Paper

Wavelet and fractal analysis of ground-vehicle images

David Gorsich, Charles Tolle, Robert Karlsen, Grant Gerhart

Proceedings Volume 2825, (1996) https://doi.org/10.1117/12.255224

KEYWORDS: Fractal analysis, Wavelets, Wavelet transforms, Image resolution, Image segmentation, Statistical analysis, Visualization, Synthetic aperture radar, Signal processing, Signal generators

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SPIE Journal Paper | 1 October 1996

Target acquisition methodology for visual and infrared imaging sensors

Grant Gerhart, Edwina Bednarz, Thomas Meitzler, Eui Sohn, Robert Karlsen

OE, Vol. 35, Issue 10, (October 1996) https://doi.org/10.1117/12.10.1117/1.600953

KEYWORDS: Target detection, Visual process modeling, Target acquisition, Data modeling, Sensors, Visualization, Performance modeling, Sensor performance, Electro optical modeling, Signal to noise ratio

SPIE Journal Paper | 1 October 1996

Wavelet transforms of cluttered images and their application to computing the probability of detection

Thomas Meitzler, Robert Karlsen, Grant Gerhart, Eui Sohn, Harpreet Singh

OE, Vol. 35, Issue 10, (October 1996) https://doi.org/10.1117/12.10.1117/1.600987

KEYWORDS: Wavelet transforms, Wavelets, Infrared imaging, Visualization, Target detection, Detection and tracking algorithms, Infrared radiation, Image processing, Target acquisition, Optical engineering

Proceedings Article | 10 June 1996 Paper

Validation status of the TARDEC visual model (TVM)

Grant Gerhart, Richard Goetz, Thomas Meitzler, Robert Karlsen

Proceedings Volume 2743, (1996) https://doi.org/10.1117/12.241966

KEYWORDS: Visual process modeling, Visualization, Target detection, Linear filtering, RGB color model, Roentgenium, Target acquisition, Calibration, Spatial frequencies, Performance modeling

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Proceedings Article | 10 June 1996 Paper

Wavelet transforms of cluttered images and their application to computing the probability of detection

Thomas Meitzler, Robert Karlsen, Grant Gerhart, Eui Sohn, Harpreet Singh

Proceedings Volume 2743, (1996) https://doi.org/10.1117/12.241974

KEYWORDS: Wavelets, Wavelet transforms, Palladium, Infrared imaging, Visualization, Detection and tracking algorithms, Infrared radiation, Image processing, Target detection, Target acquisition

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Proceedings Article | 22 March 1996 Paper

Genetic algorithms for adaptive wavelet design

Gene Tagliarini, Edward Page, Robert Karlsen, Grant Gerhart

Proceedings Volume 2762, (1996) https://doi.org/10.1117/12.235983

KEYWORDS: Wavelets, Genetic algorithms, Signal processing, Transform theory, Algorithm development, Linear filtering, Optimization (mathematics), Pattern recognition, Thermography, Video

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Proceedings Article | 22 March 1996 Paper

Comparative study of wavelet methods in ground vehicle signature analysis

Robert Karlsen, Thomas Meitzler, Grant Gerhart, David Gorsich, Howard Choe

Proceedings Volume 2762, (1996) https://doi.org/10.1117/12.236006

KEYWORDS: Wavelets, Wavelet transforms, Visualization, Distortion, RGB color model, Fast wavelet transforms, Linear filtering, Acoustics, Visual system, Image compression

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Proceedings Article | 22 March 1996 Paper

Wavelet-based ground vehicle recognition using acoustic signals

Howard Choe, Robert Karlsen, Grant Gerhart, Thomas Meitzler

Proceedings Volume 2762, (1996) https://doi.org/10.1117/12.236015

KEYWORDS: Wavelets, Discrete wavelet transforms, Acoustics, Digital signal processing, Detection and tracking algorithms, Feature extraction, Continuous wavelet transforms, Algorithm development, Databases, Time-frequency analysis

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We present, in this paper, a wavelet-based acoustic signal analysis to remotely recognize military vehicles using their sound intercepted by acoustic sensors. Since expedited signal recognition is imperative in many military and industrial situations, we developed an algorithm that provides an automated, fast signal recognition once implemented in a real-time hardware system. This algorithm consists of wavelet preprocessing, feature extraction and compact signal representation, and a simple but effective statistical pattern matching. The current status of the algorithm does not require any training. The training is replaced by human selection of reference signals (e.g., squeak or engine exhaust sound) distinctive to each individual vehicle based on human perception. This allows a fast archiving of any new vehicle type in the database once the signal is collected. The wavelet preprocessing provides time-frequency multiresolution analysis using discrete wavelet transform (DWT). Within each resolution level, feature vectors are generated from statistical parameters and energy content of the wavelet coefficients. After applying our algorithm on the intercepted acoustic signals, the resultant feature vectors are compared with the reference vehicle feature vectors in the database using statistical pattern matching to determine the type of vehicle from where the signal originated. Certainly, statistical pattern matching can be replaced by an artificial neural network (ANN); however, the ANN would require training data sets and time to train the net. Unfortunately, this is not always possible for many real world situations, especially collecting data sets from unfriendly ground vehicles to train the ANN. Our methodology using wavelet preprocessing and statistical pattern matching provides robust acoustic signal recognition. We also present an example of vehicle recognition using acoustic signals collected from two different military ground vehicles. In this paper, we will not present the mathematics involved in this research. Instead, the focus of this paper is on the application of various techniques used to achieve our goal of successful recognition.

Proceedings Article | 6 June 1995 Paper

Computational vision models of early vision for target acquisition

Grant Gerhart, Thomas Meitzler, Eui Sohn

Proceedings Volume 2426, (1995) https://doi.org/10.1117/12.211180

KEYWORDS: Visual process modeling, Spatial frequencies, Linear filtering, Target acquisition, Image filtering, Signal to noise ratio, Computer vision technology, Modulation, Visualization, Human vision and color perception

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Proceedings Article | 22 May 1995 Paper

Simulation and comparison of infrared sensors for automotive applications

Thomas Meitzler, Eui Sohn, Robert Karlsen, Grant Gerhart, Sridhar Lakshmanan

Proceedings Volume 2470, (1995) https://doi.org/10.1117/12.210065

KEYWORDS: Sensors, Infrared imaging, Infrared sensors, Thermography, Signal to noise ratio, Target detection, Visual process modeling, Infrared radiation, Imaging systems, Staring arrays

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Proceedings Article | 22 May 1995 Paper

Early vision model for target detection

Grant Gerhart, Thomas Meitzler, Eui Sohn, Gary Witus, George Lindquist, J. Richard Freeling

Proceedings Volume 2470, (1995) https://doi.org/10.1117/12.210049

KEYWORDS: Visual process modeling, Visualization, Target acquisition, Target detection, Calibration, Spatial frequencies, Image filtering, Bandpass filters, Signal to noise ratio, Image analysis

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Proceedings Article | 6 April 1995 Paper

Time-varying acoustic source identification using fusion of hidden Markov model and wavelet neural network

Howard Choe, Robert Karlsen, Thomas Meitzler, Grant Gerhart

Proceedings Volume 2491, (1995) https://doi.org/10.1117/12.205419

KEYWORDS: Acoustics, Wavelets, Neural networks, Wavelet transforms, Neurons, Signal processing, Feature extraction, Interference (communication), Autoregressive models, Fourier transforms

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Proceedings Article | 6 April 1995 Paper

Wavelet analysis of ground vehicle acoustic signatures

Robert Karlsen, Grant Gerhart, Thomas Meitzler, Richard Goetz, Howard Choe

Proceedings Volume 2491, (1995) https://doi.org/10.1117/12.205418

KEYWORDS: Wavelets, Acoustics, Wavelet transforms, Linear filtering, Fast wavelet transforms, Interference (communication), Fourier transforms, Time-frequency analysis, Lithium, Modulation

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Proceedings Article | 8 July 1994 Paper

Target discrimination using computational vision human perception models

George Lindquist, Gary Witus, Thomas Cook, J. Richard Freeling, Grant Gerhart

Proceedings Volume 2224, (1994) https://doi.org/10.1117/12.180085

KEYWORDS: Visual process modeling, Visualization, Target detection, Spatial frequencies, Performance modeling, Image processing, Image filtering, Digital filtering, 3D modeling, Detection theory

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Proceedings Article | 8 July 1994 Paper

Comparison of the performance of 3-5 and 8-12 micron infrared cameras

Thomas Meitzler, Grant Gerhart, Eui Sohn, Paul Collins

Proceedings Volume 2224, (1994) https://doi.org/10.1117/12.180078

KEYWORDS: Sensors, Atmospheric modeling, Staring arrays, Medium wave, Thermography, Thermal modeling, Cameras, Infrared cameras, Transmittance, Fiber optic gyroscopes

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Proceedings Article | 15 June 1994 Paper

Introduction of target, atmosphere, background, and sensor-specific (TABSS) delta T metric: analysis, comparison, and applications

Howard Choe, Peter Ahn, Thomas Meitzler, Eui Sohn, Grant Gerhart

Proceedings Volume 2223, (1994) https://doi.org/10.1117/12.177928

KEYWORDS: Thermal modeling, Performance modeling, Atmospheric sensing, Sensors, Sensor performance, Target detection, Target recognition, Atmospheric modeling, Thermography, Imaging systems

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Proceedings Article | 31 August 1993 Paper

Evaluation of deltaT using statistical characteristics of the target and background

Grant Gerhart, Thomas Meitzler, Eui Sohn, Howard Choe

Proceedings Volume 1969, (1993) https://doi.org/10.1117/12.154736

KEYWORDS: Target detection, Spatial frequencies, Visual process modeling, Sensors, Visualization, Thermography, Statistical analysis, Optical sensors, Eye models, Thermal modeling

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Proceedings Article | 13 August 1993 Paper

Background and target randomization and root mean square (RMS) background matching using a new deltaT metric definition

Howard Choe, Thomas Meitzler, Grant Gerhart

Proceedings Volume 1967, (1993) https://doi.org/10.1117/12.151080

KEYWORDS: Target detection, Algorithm development, Computer simulations, Sensors, Detection and tracking algorithms, Silicon, Electro optical modeling, Imaging systems, Information operations, Electroluminescence

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Proceedings Article | 13 August 1993 Paper

Evaluation of T using statistical characteristics of the target and background

Grant Gerhart, Thomas Meitzler, Eui Sohn, Howard Choe

Proceedings Volume 1967, (1993) https://doi.org/10.1117/12.151066

KEYWORDS: Target detection, Spatial frequencies, Visual process modeling, Sensors, Image sensors, Visualization, Thermography, Statistical analysis, Optical sensors, Eye models

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Proceedings Article | 21 September 1992 Paper

Performance assessment methodology for ground vehicle infrared and visual signature countermeasures

Grant Gerhart, Thomas Meitzler

Proceedings Volume 1687, (1992) https://doi.org/10.1117/12.137860

KEYWORDS: Infrared signatures, Visualization, Target acquisition, Data modeling, Modulation transfer functions, Target detection, Sensors, Visual process modeling, Infrared radiation, Curium

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Proceedings Article | 16 September 1992 Paper

Spatial aliasing effects in ground vehicle IR imagery

Thomas Meitzler, Grant Gerhart, Thomas Cook, J. Richard Freeling

Proceedings Volume 1689, (1992) https://doi.org/10.1117/12.137954

KEYWORDS: Target detection, Sensors, Infrared imaging, Imaging systems, Signal detection, Thermography, Thermal modeling, Curium, Interference (communication), Electronic filtering

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Proceedings Article | 1 September 1992 Paper

High-resolution infrared signature modeling: a U.S. Army perspective

Teresa Gonda, Grant Gerhart

Proceedings Volume 1685, (1992) https://doi.org/10.1117/12.137820

KEYWORDS: Thermal modeling, Sensors, Performance modeling, Atmospheric modeling, Data modeling, Electro optical modeling, Weapons, Infrared detectors, Visualization, Staring arrays

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Showing 5 of 82 publications

Proceedings Volume Editor (19)

SPIE Conference Volume | 7 July 2016

Unmanned Systems Technology XVIII

SPIE Conference Volume | 9 June 2015

Unmanned Systems Technology XVII

SPIE Conference Volume | 24 June 2014

Unmanned Systems Technology XVI

SPIE Conference Volume | 13 June 2013

Unmanned Systems Technology XV

SPIE Conference Volume | 7 May 2012

Unmanned Systems Technology XIV

Showing 5 of 19 publications

Conference Committee Involvement (31)

Unmanned/Unattended Sensors and Sensor Networks

27 September 2016 | Edinburgh, United Kingdom

Unmanned Systems Technology XVIII

20 April 2016 | Baltimore, MD, United States

Unmanned/Unattended Sensors and Sensor Networks

23 September 2015 | Toulouse, France

Unmanned Systems Technology XVII

21 April 2015 | Baltimore, MD, United States

Unmanned/Unattended Sensors and Sensor Networks

24 September 2014 | Amsterdam, Netherlands

Unmanned Systems Technology XVI

6 May 2014 | Baltimore, MD, United States

Unmanned/Unattended Sensors and Sensor Networks X

23 September 2013 | Dresden, Germany

Unmanned Systems Technology XV

1 May 2013 | Baltimore, Maryland, United States

Unmanned/Unattended Sensors and Sensor Networks

26 September 2012 | Edinburgh, United Kingdom

Unmanned Systems Technology XIV

25 April 2012 | Baltimore, Maryland, United States

Unmanned/Unattended Sensors and Sensor Networks

20 September 2011 | Prague, Czech Republic

Unmanned Systems Technology XIII

27 April 2011 | Orlando, Florida, United States

Unmanned/Unattended Sensors and Sensor Networks

20 September 2010 | Toulouse, France

Unmanned Systems Technology XII

6 April 2010 | Orlando, Florida, United States

Unmanned/Unattended Sensors and Sensor Networks VI

1 September 2009 | Berlin, Germany

Unmanned Systems Technology XI

14 April 2009 | Orlando, Florida, United States

Unmanned/Unattended Sensors and Sensor Networks V

16 September 2008 | Cardiff, Wales, United Kingdom

Unmanned Systems Technology X

17 March 2008 | Orlando, Florida, United States

Unmanned/Unattended Sensors and Sensor Networks IV

18 September 2007 | Florence, Italy

Unmanned Systems Technology IX

9 April 2007 | Orlando, Florida, United States

Unmanned/Unattended Sensors and Sensor Networks III

11 September 2006 | Stockholm, Sweden

Unmanned Systems Technology VIII

17 April 2006 | Orlando (Kissimmee), Florida, United States

Unmanned/Unattended Sensors and Sensor Networks II

26 September 2005 | Bruges, Belgium

Unmanned Ground Vehicle Technology VII

29 March 2005 | Orlando, Florida, United States

Unmanned Ground Vehicle Technology VI

13 April 2004 | Orlando, Florida, United States

Unmanned Ground Vehicle Technology V

22 April 2003 | Orlando, Florida, United States

Unmanned Ground Vehicle Technology IV

2 April 2002 | Orlando, FL, United States

Unmanned Ground Vehicle Technology III

16 April 2001 | Orlando, FL, United States

Unmanned Ground Vehicle Technology II

24 April 2000 | Orlando, FL, United States

Unmanned Ground Vehicle Technology

7 April 1999 | Orlando, FL, United States

Robotic and Semi-Robotic Ground Vehicle Technology

15 April 1998 | Orlando, FL, United States

Showing 5 of 31 Conference Committees

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