Dr. Stephen P. DelMarco Profile

Dr. Stephen P. DelMarco

Senior Principal Research Engineer III at BAE Systems

SPIE Involvement:

Conference Chair | Editor | Author

Publications (37)

Proceedings Article | 7 June 2024 Presentation + Paper

Image registration refinement using progressively sharpened alpha-rooting parameters

Stephen DelMarco

Proceedings Volume 13033, 1303305 (2024) https://doi.org/10.1117/12.3013324

KEYWORDS: Image registration, Tolerancing, Correlation coefficients, Image sharpness, Image fusion, Image processing, Tunable filters, Image resolution, Phase only filters, Image filtering

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Proceedings Article | 7 June 2024 Presentation + Paper

Detecting chaotic dynamics in cardiac signals from laser Doppler vibrometry

Stephen DelMarco

Proceedings Volume 13033, 130330D (2024) https://doi.org/10.1117/12.3019074

KEYWORDS: Laser Doppler velocimetry, Signal detection, Doppler effect, Vibrometry, Heart, Vibration, Phase reconstruction, Dynamical systems, Complex systems, Biometrics

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Proceedings Article | 15 June 2023 Presentation + Paper

Application of computational topology to vision aided navigation in GPS-denied regions

Stephen DelMarco

Proceedings Volume 12526, 1252608 (2023) https://doi.org/10.1117/12.2662933

KEYWORDS: Data analysis, Computer vision technology, Histograms, Algorithm development, Visualization, Sensor networks, Mathematics, Image registration, Vector spaces, Shape analysis

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Proceedings Article | 15 June 2023 Presentation + Paper

A machine learning approach to image registration verification

Stephen DelMarco, Helen Webb, Frank Stolle, Simone Bortolami, Frank Tucker, Travis Hillyer

Proceedings Volume 12526, 1252604 (2023) https://doi.org/10.1117/12.2663789

KEYWORDS: Image registration, Machine learning, Radon transform, Image processing, Image fusion, Education and training, Detection and tracking algorithms, Windows, Thermography, Optical alignment

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Proceedings Article | 14 June 2023 Poster + Paper

Extending neural radiance fields (NeRF) for synthetic aperture radar (SAR) novel image generation

William Snyder, Stephen DelMarco, Dylan Snover, Amit Bhatia, Scott Kuzdeba

Proceedings Volume 12529, 1252912 (2023) https://doi.org/10.1117/12.2666925

KEYWORDS: Synthetic aperture radar, 3D modeling, Education and training, 3D image processing, Data modeling, Image processing, 3D acquisition, Voxels, Machine learning, Solid modeling

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An important application of deep learning classifiers is to recognize vehicles or ships in satellite images. Neural Radiance Field (NeRF) methods apply a limited number of 2D electro-optical (EO) views of an object to learn its 3D shape and view-dependent radiance properties. The resulting latent model generates novel views for training a deep learning classifier. Space-based synthetic aperture radar (SAR) sensors present a new, useful source of wide-area imagery. Because SAR phenomenology and geometry are different from EO, we construct a suitable NeRF-like approach for SAR and demonstrate generation of realistic simulated SAR imagery..Several commercial and military applications classify vehicles or ships in satellite images. In many cases, it is infeasible to acquire looks at the objects over the wide range of views and conditions needed for machine learning classifier training. Neural Radiance Fields (NeRF) and other related methods apply a limited number of 2D views of an object to learn its 3D shape and view-dependent radiance properties. One application of these techniques is to generate additional, novel views of objects for training deep learning classifiers. Current NeRF and NeRF-like methods have been demonstrated with electro-optical (EO) imagery. The emergence of space-based synthetic aperture radar (SAR) imaging sensors presents a new, useful source of wide-area imagery with day/night, all-weather commercial and military applications. Because SAR imaging phenomenology and projection geometry are different from EO, the application of NeRF-like methods to generate novel SAR images of objects for training a classifier presents new challenges. For example, unlike EO, the mono-static SAR illumination source moves with the sensor view geometry. In addition, the 2D SAR image projection is angle-range, not angle-angle. In this paper, we evaluate the salient differences between EO and SAR, and construct a processing pipeline to generate realistic synthetic SAR imagery. The synthetic SAR imagery provides additional training data, augmenting collected image data, for machine learning-based Automatic Target Recognition (ATR) algorithms. We provide examples of synthetic SAR image creation using this approach.

Proceedings Article | 27 May 2022 Presentation + Paper

Optimal vision aided navigation in GPS-denied regions

Stephen Del Marco, Simone Bortolami, Victor Tom

Proceedings Volume 12100, 121000A (2022) https://doi.org/10.1117/12.2618058

KEYWORDS: Image registration, Image segmentation, Cameras, Visual process modeling, Global Positioning System, Data modeling, Unmanned aerial vehicles, Optimization (mathematics), Algorithm development

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Proceedings Article | 12 April 2021 Presentation + Paper

A multi-camera system for vision-based altitude estimation

Stephen DelMarco

Proceedings Volume 11734, 1173407 (2021) https://doi.org/10.1117/12.2585807

KEYWORDS: Image registration, Global Positioning System, Error analysis, Image fusion, Statistical analysis, Passive sensors, Onboard cameras, Numerical simulations, Calibration

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Proceedings Article | 12 April 2021 Presentation + Paper

Multi-template multi-channel image matching using tensor products of low-dimensional Clifford algebras

Stephen DelMarco

Proceedings Volume 11734, 1173404 (2021) https://doi.org/10.1117/12.2585801

KEYWORDS: Image fusion, Fourier transforms, Sensors, Data fusion

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Proceedings Article | 21 April 2020 Presentation + Paper

Theoretical analysis of quaternion image matching performance

Stephen DelMarco

Proceedings Volume 11399, 1139908 (2020) https://doi.org/10.1117/12.2558728

KEYWORDS: Image processing, Image analysis, Fourier transforms, Data processing, Signal detection, Signal processing, Receivers, Phase shifts, Signal to noise ratio, Transform theory

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Proceedings Article | 21 April 2020 Presentation + Paper

Mathematical foundations of quaternion image matching

Stephen DelMarco

Proceedings Volume 11399, 1139907 (2020) https://doi.org/10.1117/12.2558712

KEYWORDS: Image processing, Image fusion, Signal to noise ratio, Image sensors, Fourier transforms, Vector spaces, Image registration, Feature extraction, RGB color model, Edge detection

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Proceedings Article | 14 May 2019 Presentation + Paper

Shape-based ATR for wide-area processing of satellite imagery

Stephen DelMarco, Victor Tom, Helen Webb, William Snyder, Christopher Jarvis, David Fay

Proceedings Volume 10988, 1098805 (2019) https://doi.org/10.1117/12.2518185

KEYWORDS: 3D modeling, Automatic target recognition, Target detection, Target recognition, Satellite imaging, Satellites, Model-based design, Detection and tracking algorithms, Earth observing sensors, Machine learning

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Proceedings Article | 13 May 2019 Presentation + Paper

Spectrally-shaped correlation with application to image registration

Stephen DelMarco, Helen Webb, Victor Tom

Proceedings Volume 10993, 1099306 (2019) https://doi.org/10.1117/12.2518171

KEYWORDS: Image registration, Fourier transforms, Video, Image processing, Unmanned aerial vehicles, Image filtering, Pattern recognition

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Proceedings Article | 13 May 2019 Presentation + Paper

Automatic spatial accuracy estimation for correlation-based image registration

Stephen DelMarco, Helen Webb, Victor Tom

Proceedings Volume 10993, 1099307 (2019) https://doi.org/10.1117/12.2518183

KEYWORDS: Image registration, Error analysis, Video, Statistical analysis, Performance modeling, Image analysis, Unmanned aerial vehicles, Distortion, Pattern recognition

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Proceedings Article | 14 May 2018 Presentation + Paper

Mathematical aspects of transit photometry for small UAV detection in video

Stephen DelMarco, Helen Webb

Proceedings Volume 10668, 1066802 (2018) https://doi.org/10.1117/12.2303889

KEYWORDS: Photometry, Unmanned aerial vehicles, Video surveillance, Video, Surveillance, Astronomy, Motion models, Target detection, Cameras, Statistical modeling

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Proceedings Article | 10 May 2017 Paper

Detection of chaotic dynamics in human gait signals from mobile devices

Stephen DelMarco, Yunbin Deng

Proceedings Volume 10221, 102210C (2017) https://doi.org/10.1117/12.2261025

KEYWORDS: Gait analysis, Mobile devices, Gyroscopes, Signal detection, Biometrics, Dynamical systems, Neurological disorders, Heart, Brain, Cell phones, Complex systems, Human subjects, Sensors, Chaos, Databases

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Proceedings Article | 19 May 2016 Paper

Improved deadzone modeling for bivariate wavelet shrinkage-based image denoising

Stephen DelMarco

Proceedings Volume 9869, 986909 (2016) https://doi.org/10.1117/12.2222910

KEYWORDS: Denoising, Wavelets, Image denoising, Image processing, Performance modeling, Detection and tracking algorithms, Image quality, Signal to noise ratio, Image filtering, Statistical modeling

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Proceedings Article | 21 May 2015 Paper

A nonparametric hypothesis testing approach to wavelet domain image fusion

Stephen DelMarco

Proceedings Volume 9497, 949703 (2015) https://doi.org/10.1117/12.2176588

KEYWORDS: Image fusion, Wavelets, Wavelet transforms, Data fusion, Fusion energy, Image filtering, Databases, Visualization, Image resolution, Image denoising

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Proceedings Article | 22 May 2014 Paper

Search algorithm complexity modeling with application to image alignment and matching

Stephen DelMarco

Proceedings Volume 9120, 91200C (2014) https://doi.org/10.1117/12.2049605

KEYWORDS: Data modeling, Model-based design, Mathematical modeling, Lawrencium, Biometrics, Detection and tracking algorithms, Databases, Systems modeling, Biological research, Object recognition

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Proceedings Article | 28 May 2013 Paper

Progress in multi-channel image fusion for face image matching

Stephen DelMarco

Proceedings Volume 8755, 87550H (2013) https://doi.org/10.1117/12.2014281

KEYWORDS: Image fusion, Image processing, Composites, Data fusion, Algorithm development, Image restoration, Image registration, 3D image processing, Signal processing, Fourier transforms

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Proceedings Article | 8 May 2012 Paper

Mathematical properties of a sensitivity measure for quantifying feature variation

Stephen DelMarco

Proceedings Volume 8406, 84060F (2012) https://doi.org/10.1117/12.918508

KEYWORDS: Lithium, Feature extraction, 3D modeling, Detection and tracking algorithms, Data modeling, Pattern recognition, Edge detection, Image registration, Associative arrays, Atmospheric modeling

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Proceedings Article | 27 May 2011 Paper

Multi-template image matching using alpha-rooted biquaternion phase correlation with application to logo recognition

Stephen DelMarco

Proceedings Volume 8063, 80630D (2011) https://doi.org/10.1117/12.883302

KEYWORDS: Image fusion, Signal processing, Image processing, Data modeling, Transform theory, Fourier transforms, Multispectral imaging, Filtering (signal processing), 3D modeling, Sensors

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Proceedings Article | 28 April 2010 Paper

Multiple template-based image matching using alpha-rooted quaternion phase correlation

Stephen DelMarco

Proceedings Volume 7708, 77080F (2010) https://doi.org/10.1117/12.849573

KEYWORDS: Fourier transforms, Image processing, Image fusion, Image registration, Machine vision, Computer vision technology, Radon transform, Distortion, Tolerancing, Image sensors

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Proceedings Article | 2 September 2009 Paper

Logo recognition using alpha-rooted phase correlation in the radon transform domain

Stephen DelMarco

Proceedings Volume 7443, 744305 (2009) https://doi.org/10.1117/12.824692

KEYWORDS: Radon transform, Tolerancing, Error analysis, Databases, Image enhancement, Radon, Detection and tracking algorithms, Hough transforms, Fourier transforms, Video

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Proceedings Article | 11 May 2009 Paper

Dynamic algorithm selection for multi-sensor image registration

Stephen DelMarco, Victor Tom, Helen Webb, David Lefebvre

Proceedings Volume 7336, 733612 (2009) https://doi.org/10.1117/12.813559

KEYWORDS: Image registration, Algorithm development, Synthetic aperture radar, Feature selection, Sensors, Image fusion, Image sensors, Image processing, Space operations, Detection and tracking algorithms

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Proceedings Article | 29 April 2009 Paper

The design of wavelets for image enhancement and target detection

Stephen DelMarco, Sos Agaian

Proceedings Volume 7351, 735103 (2009) https://doi.org/10.1117/12.816135

KEYWORDS: Wavelets, Target detection, Visibility, Image filtering, Infrared imaging, Infrared detectors, Infrared radiation, Sensors, Detection and tracking algorithms, Information visualization

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Proceedings Article | 17 April 2008 Paper

A smart iterative algorithm for multisensor image registration

Stephen DelMarco, Victor Tom, Helen Webb

Proceedings Volume 6968, 696816 (2008) https://doi.org/10.1117/12.771442

KEYWORDS: Image registration, Sensors, Feature extraction, Image processing, Synthetic aperture radar, Image sensors, Image fusion, Tolerancing, Edge detection, Detection and tracking algorithms

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Proceedings Article | 16 April 2008 Paper

Qualitative performance of a local track repair algorithm for video tracking on small UAVs

Stephen DelMarco

Proceedings Volume 6963, 69630N (2008) https://doi.org/10.1117/12.771429

KEYWORDS: Video, Detection and tracking algorithms, Principal component analysis, Video surveillance, Unmanned aerial vehicles, Data acquisition, Algorithm development, Computer simulations, Analytical research, Cameras

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Proceedings Article | 5 October 2007 Paper

Local track repair for video tracking on small UAVs

Stephen DelMarco, Matthew Antone, Austin Reiter, Todd Jenkins

Proceedings Volume 6736, 673610 (2007) https://doi.org/10.1117/12.739616

KEYWORDS: Video, Video surveillance, Unmanned aerial vehicles, Detection and tracking algorithms, Cameras, Signal to noise ratio, Data acquisition, Analytical research, Kinematics, Sensors

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Proceedings Article | 10 May 2007 Paper

A verification metric for multi-sensor image registration

Stephen DelMarco, Victor Tom, Helen Webb, David Lefebvre

Proceedings Volume 6567, 656718 (2007) https://doi.org/10.1117/12.719315

KEYWORDS: Image registration, Sensors, Image sensors, Error analysis, Failure analysis, Image processing, Algorithm development, Synthetic aperture radar, Feature extraction, Receivers

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Proceedings Article | 7 May 2007 Paper

Application of a dynamic feature selection algorithm to multi-sensor image registration

Stephen DelMarco, Victor Tom, Helen Webb, David Lefebvre

Proceedings Volume 6567, 656717 (2007) https://doi.org/10.1117/12.713922

KEYWORDS: Image registration, Sensors, Algorithm development, Feature selection, Image sensors, Feature extraction, Synthetic aperture radar, Detection and tracking algorithms, Image processing, Edge detection

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Proceedings Article | 18 May 2006 Paper

Hierarchical searching in model-based LADAR ATR using statistical separability tests

Stephen DelMarco, Erik Sobel, Joel Douglas

Proceedings Volume 6234, 623403 (2006) https://doi.org/10.1117/12.662125

KEYWORDS: Data modeling, 3D modeling, Model-based design, Databases, Solid modeling, LIDAR, Taxonomy, Chemical elements, Object recognition, Algorithm development

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Proceedings Article | 17 May 2006 Paper

Automatic parameter selection for feature-based multi-sensor image registration

Stephen DelMarco, Victor Tom, Helen Webb, Alan Chao

Proceedings Volume 6235, 623519 (2006) https://doi.org/10.1117/12.665062

KEYWORDS: Image registration, Sensors, Edge detection, Algorithm development, Detection and tracking algorithms, Image sensors, Synthetic aperture radar, Image analysis, Image processing, Remote sensing

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Proceedings Article | 19 May 2005 Paper

A theoretical framework for 3D LADAR ATR problem definition and performance evaluation

Stephen DelMarco, Erik Sobel, Joel Douglas

Proceedings Volume 5807, (2005) https://doi.org/10.1117/12.603534

KEYWORDS: Automatic target recognition, Lithium, LIDAR, 3D acquisition, 3D modeling, Algorithm development, Target recognition, Solid modeling, Detection and tracking algorithms, Computer aided design

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Proceedings Article | 22 March 1996 Paper

Time/scale-adjusted dyadic wavelet packet bases

Stephen Del Marco

Proceedings Volume 2762, (1996) https://doi.org/10.1117/12.236031

KEYWORDS: Wavelets, Sensors, Signal detection, Signal to noise ratio, Sensor performance, Interference (communication), Signal processing, Monte Carlo methods, Detector development, Electronic filtering

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Proceedings Article | 6 April 1995 Paper

Use of the wavelet transform for improved CFAR detection in cw radar seekers

Stephen Del Marco

Proceedings Volume 2491, (1995) https://doi.org/10.1117/12.205402

KEYWORDS: Wavelets, Sensors, Signal detection, Wavelet transforms, Interference (communication), Doppler effect, Radar, Target detection, Signal processing, Sensor performance

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SPIE Journal Paper | 1 July 1994

M-band wavepacket-based transient signal detector using a translation-invariant wavelet transform

Stephen Del Marco, John Weiss

OE, Vol. 33, Issue 07, (July 1994) https://doi.org/10.1117/12.10.1117/12.172246

KEYWORDS: Signal detection, Sensors, Wavelets, Wavelet transforms, Sensor performance, Electronic filtering, Fermium, Linear filtering, Signal to noise ratio, Interference (communication)

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Proceedings Article | 15 March 1994 Paper

Wavepacket-based transient signal detector using a translation-invariant wavelet transform

Stephen Del Marco, John Weiss, Karl Jagler

Proceedings Volume 2242, (1994) https://doi.org/10.1117/12.170077

KEYWORDS: Sensors, Signal detection, Wavelets, Wavelet transforms, Interference (communication), Sensor performance, Algorithm development, Linear filtering, Fermium, Detection and tracking algorithms

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Showing 5 of 37 publications

Proceedings Volume Editor (9)

SPIE Conference Volume | 27 June 2024

Multimodal Image Exploitation and Learning 2024

SPIE Conference Volume | 25 July 2023

Multimodal Image Exploitation and Learning 2023

SPIE Conference Volume | 6 July 2022

Multimodal Image Exploitation and Learning 2022

SPIE Conference Volume | 6 May 2021

Multimodal Image Exploitation and Learning 2021

SPIE Conference Volume | 22 May 2020

Mobile Multimedia/Image Processing, Security, and Applications 2020

Showing 5 of 9 publications

Conference Committee Involvement (16)

Multimodal Image Exploitation and Learning 2025

14 April 2025 | Orlando, Florida, United States

Multimodal Image Exploitation and Learning 2024

22 April 2024 | National Harbor, Maryland, United States

Multimodal Image Exploitation and Learning 2023

1 May 2023 | Orlando, Florida, United States

Multimodal Image Exploitation and Learning 2022

4 April 2022 | Orlando, Florida, United States

Multimodal Image Exploitation and Learning 2021

12 April 2021 | Online Only, Florida, United States

Mobile Image Exploitation and Learning 2020

27 April 2020 | Online Only, California, United States

Mobile Multimedia/Image Processing, Security, and Applications 2019

15 April 2019 | Baltimore, MD, United States

Mobile Multimedia/Image Processing, Security, and Applications 2018

16 April 2018 | Orlando, FL, United States

Mobile Multimedia/Image Processing, Security, and Applications 2017

10 April 2017 | Anaheim, CA, United States

Mobile Multimedia/Image Processing, Security, and Applications 2016

18 April 2016 | Baltimore, MD, United States

Mobile Multimedia/Image Processing, Security, and Applications 2015

20 April 2015 | Baltimore, MD, United States

Mobile Multimedia/Image Processing, Security, and Applications 2014

5 May 2014 | Baltimore, MD, United States

Mobile Multimedia/Image Processing, Security, and Applications 2013

29 April 2013 | Baltimore, Maryland, United States

Mobile Multimedia/Image Processing, Security, and Applications 2012

23 April 2012 | Baltimore, Maryland, United States

Mobile Multimedia/Image Processing, Security, and Applications 2011

25 April 2011 | Orlando, Florida, United States

Mobile Multimedia/Image Processing, Security, and Applications 2010

5 April 2010 | Orlando, Florida, United States

Showing 5 of 16 Conference Committees

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