Dr. Randy S. Roberts Profile

Dr. Randy S. Roberts

at Lawrence Livermore National Lab

SPIE Involvement:

Author

Publications (14)

Proceedings Article | 7 September 2018 Presentation + Paper

A visual wikipedia for satellite imagery

Randy Roberts, John Goforth, George Weinert, Will Ray, Charles Grant, Art Jolly

Proceedings Volume 10751, 1075103 (2018) https://doi.org/10.1117/12.2324020

KEYWORDS: Satellites, Satellite imaging, 3D modeling, Visualization, 3D image processing, Information visualization

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Proceedings Article | 14 September 2016 Presentation + Paper

Image processing for the Advanced Radiographic Capability (ARC) at the National Ignition Facility

Richard Leach, Abdul A. Awwal, Roger Lowe-Webb, Victoria Miller-Kamm, Charles Orth, Randy Roberts, Karl Wilhelmsen

Proceedings Volume 9970, 99700M (2016) https://doi.org/10.1117/12.2239434

KEYWORDS: National Ignition Facility, Image processing, Image sensors, Image analysis, Detection and tracking algorithms, Image segmentation, Diagnostics, Laser processing, Mirrors, Reticles

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Proceedings Article | 9 September 2015 Paper

Automated alignment of the Advanced Radiographic Capability (ARC) target area at the National Ignition Facility

Randy Roberts, Abdul A. Awwal, Erlan Bliss, John Heebner, Richard Leach, Charles Orth, Michael Rushford, Roger Lowe-Webb, Karl Wilhelmsen

Proceedings Volume 9598, 959814 (2015) https://doi.org/10.1117/12.2190252

KEYWORDS: National Ignition Facility, Mirrors, Diagnostics, Cameras, Image processing, X-rays, CCD cameras, Charge-coupled devices, Optical alignment, Tolerancing

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Proceedings Article | 9 September 2015 Paper

Detecting fiducials affected by trombone delay in ARC and the main laser alignment at the National Ignition Facility

Abdul A. Awwal, Erlan Bliss, Victoria Miller Kamm, Richard Leach, Randy Roberts, Michael Rushford, Roger Lowe-Webb, Karl Wilhelmsen

Proceedings Volume 9598, 959812 (2015) https://doi.org/10.1117/12.2190065

KEYWORDS: National Ignition Facility, Distortion, X-rays, Image processing, X-ray imaging, Optical alignment, Fusion energy, Diagnostics, Free space optics, Sensors

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Proceedings Article | 9 September 2015 Paper

Alignment mask design and image processing for the Advanced Radiographic Capability (ARC) at the National Ignition Facility

Richard Leach, Abdul Awwal, Simon Cohen, Roger Lowe-Webb, Randy Roberts, Thad Salmon, David Smauley, Karl Wilhelmsen

Proceedings Volume 9598, 959819 (2015) https://doi.org/10.1117/12.2189563

KEYWORDS: National Ignition Facility, Image processing, Reticles, Image segmentation, Signal processing, Photomasks, Evolutionary algorithms, X-rays, Image compression, Image processing algorithms and systems

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Proceedings Article | 26 February 2015 Paper

Centroid stabilization in alignment of FOA corner cube: designing of a matched filter

Abdul Awwal, Karl Wilhelmsen, Randy Roberts, Richard Leach, Victoria Miller Kamm, Tony Ngo, Roger Lowe-Webb

Proceedings Volume 9345, 93450L (2015) https://doi.org/10.1117/12.2083537

KEYWORDS: Composites, Image filtering, Phase only filters, National Ignition Facility, Electronic filtering, Optical amplifiers, Optical filters, Crystals, Laser crystals, Frequency conversion

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Proceedings Article | 14 October 2014 Paper

Analysis of the confluence of three patterns using the Centering and Pointing System (CAPS) images for the Advanced Radiographic Capability (ARC) at the National Ignition Facility

Richard Leach, Abdul Awwal, Erlan Bliss, Randy Roberts, Michael Rushford, Karl Wilhelmsen, Thomas Zobrist

Proceedings Volume 9216, 92161Q (2014) https://doi.org/10.1117/12.2064664

KEYWORDS: National Ignition Facility, Image processing, Image segmentation, Image analysis, Image fusion, Signal processing, Algorithm development, Cameras, Diagnostics, Near field optics

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Proceedings Article | 19 September 2014 Paper

Image analysis algorithms for the advanced radiographic capability (ARC) grating tilt sensor at the National Ignition Facility

Randy Roberts, Erlan Bliss, Michael Rushford, John Halpin, Abdul Awwal, Richard Leach

Proceedings Volume 9216, 92160B (2014) https://doi.org/10.1117/12.2062679

KEYWORDS: National Ignition Facility, Binary data, Sensors, Cameras, Image analysis, Reticles, Mirrors, Algorithm development, Image sensors, Beam analyzers

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Proceedings Article | 19 September 2014 Paper

Detecting objects with partial obstruction at the ARC split beam injector images at the National Ignition Facility

Abdul Awwal, Richard Leach, Randy Roberts, Karl Wilhelmsen, David McGuigan, Jeff Jarboe

Proceedings Volume 9216, 92160E (2014) https://doi.org/10.1117/12.2062678

KEYWORDS: Image processing, National Ignition Facility, Beam splitters, Image segmentation, Electronic filtering, Optical alignment, Image filtering, Control systems, X-rays, Diagnostics

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Proceedings Article | 20 February 2013 Paper

Image processing methods for characterizing cryogenic target quality during ice layer formation at the National Ignition Facility (NIF)

Richard Leach, John Field, Laura Mascio-Kegelmeyer, Bernie Kozioziemski, Tanza Lee, Evan Mapoles, Randy Roberts, Rebecca Dylla-Spears, Tayyab Suratwala

Proceedings Volume 8602, 86020H (2013) https://doi.org/10.1117/12.2009413

KEYWORDS: Image segmentation, National Ignition Facility, Image quality, Image processing, Cryogenics, X-rays, Image registration, Solids, X-ray imaging, Crystals

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Proceedings Article | 1 September 2009 Paper

Signal and image processing research at the Lawrence Livermore National Laboratory

Randy Roberts, Lisa Poyneer, Laura Kegelmeyer, Carmen Carrano, David Chambers, James Candy

Proceedings Volume 7442, 744207 (2009) https://doi.org/10.1117/12.830916

KEYWORDS: Adaptive optics, Signal processing, Image processing, Imaging systems, National Ignition Facility, Point spread functions, Gemini Planet Imager, Spatial frequencies, Inspection, Atmospheric modeling

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Proceedings Article | 5 May 2006 Paper

Autonomous UAV-based mapping of large-scale urban firefights

Stephen Snarski, Karl Scheibner, Scott Shaw, Randy Roberts, Andy LaRow, Eric Breitfeller, Jasper Lupo, Darron Nielson, Bill Judge, Jim Forren

Proceedings Volume 6209, 620905 (2006) https://doi.org/10.1117/12.665310

KEYWORDS: Sensors, Acoustics, Infrared sensors, Unmanned aerial vehicles, Weapons, Infrared imaging, Data acquisition, Rockets, Environmental sensing, Infrared search and track

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This paper describes experimental results from a live-fire data collect designed to demonstrate the ability of IR and acoustic sensing systems to detect and map high-volume gunfire events from tactical UAVs. The data collect supports an exploratory study of the FightSight concept in which an autonomous UAV-based sensor exploitation and decision support capability is being proposed to provide dynamic situational awareness for large-scale battalion-level firefights in cluttered urban environments. FightSight integrates IR imagery, acoustic data, and 3D scene context data with prior time information in a multi-level, multi-step probabilistic-based fusion process to reliably locate and map the array of urban firing events and firepower movements and trends associated with the evolving urban battlefield situation. Described here are sensor results from live-fire experiments involving simultaneous firing of multiple sub/super-sonic weapons (2-AK47, 2-M16, 1 Beretta, 1 Mortar, 1 rocket) with high optical and acoustic clutter at ranges up to 400m. Sensor-shooter-target configurations and clutter were designed to simulate UAV sensing conditions for a high-intensity firefight in an urban environment. Sensor systems evaluated were an IR bullet tracking system by Lawrence Livermore National Laboratory (LLNL) and an acoustic gunshot detection system by Planning Systems, Inc. (PSI). The results demonstrate convincingly the ability for the LLNL and PSI sensor systems to accurately detect, separate, and localize multiple shooters and the associated shot directions during a high-intensity firefight (77 rounds in 5 sec) in a high acoustic and optical clutter environment with very low false alarms. Preliminary fusion processing was also examined that demonstrated an ability to distinguish co-located shooters (shooter density), range to <0.5 m accuracy at 400m, and weapon type. The combined results of the high-intensity firefight data collect and a detailed systems study demonstrate the readiness of the FightSight concept for full system development and integration.

Proceedings Article | 22 September 2003 Paper

UAV cooperation architectures for persistent sensing

Randy Roberts, Claudia Kent, Christoph Cunningham, Erik Jones

Proceedings Volume 5071, (2003) https://doi.org/10.1117/12.485922

KEYWORDS: Unmanned aerial vehicles, Sensors, Network architectures, Computer architecture, Sensor networks, Data communications, Computer simulations, Unattended ground sensors, Wireless communications, Device simulation

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Proceedings Article | 18 June 2003 Paper

Regression techniques for material identification in hyperspectral data

Randy Roberts

Proceedings Volume 5001, (2003) https://doi.org/10.1117/12.500372

KEYWORDS: Received signal strength, Stochastic processes, Genetic algorithms, Data modeling, Error analysis, Statistical modeling, Minerals, Algorithm development, Hyperspectral imaging, Computer simulations

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Showing 5 of 14 publications

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