Dr. Joshua N. Ash Profile

Dr. Joshua N. Ash

at Wright State Univ.

SPIE Involvement:

Conference Program Committee | Author

Publications (16)

Proceedings Article | 7 June 2024 Presentation + Paper

A generalized gamma copula model for high resolution polarimetric SAR change detection

Stephen Herman, Joshua Ash

Proceedings Volume 13032, 130320D (2024) https://doi.org/10.1117/12.3028781

KEYWORDS: Synthetic aperture radar, Polarimetry, Detection and tracking algorithms, Polarization, Statistical analysis

Read Abstract +

Proceedings Article | 14 May 2019 Presentation + Paper

LWIR change detection using robustified temperature emissivity separation and alpha residuals

Nicholas Durkee, Joshua Ash, Joseph Meola

Proceedings Volume 10986, 1098603 (2019) https://doi.org/10.1117/12.2519192

KEYWORDS: Long wavelength infrared, Error analysis, Mahalanobis distance, Atmospheric modeling, Temperature metrology, Detection and tracking algorithms, Analytical research, Infrared detectors, Infrared imaging, Infrared radiation

Read Abstract +

Proceedings Article | 8 May 2018 Presentation + Paper

Temperature-robust longwave infrared hyperspectral change detection

Nicholas Durkee, Joshua Ash, Joseph Meola

Proceedings Volume 10644, 1064412 (2018) https://doi.org/10.1117/12.2304053

KEYWORDS: Long wavelength infrared, Temperature metrology, Atmospheric modeling, Detection and tracking algorithms, Error analysis, Optimization (mathematics), Infrared detectors, Infrared radiation, Atmospheric sensing, Linear filtering

Read Abstract +

Proceedings Article | 27 April 2018 Presentation + Paper

Leveraging 3D models for SAR-based navigation in GPS-denied environments

Zachary Reid, Josh Ash

Proceedings Volume 10647, 106470H (2018) https://doi.org/10.1117/12.2304420

KEYWORDS: Synthetic aperture radar, Radar, Navigation systems, 3D modeling, Algorithm development, Global Positioning System, LIDAR, Point spread functions, Databases, Scattering, Radar imaging

Read Abstract +

Proceedings Article | 17 May 2016 Paper

Temperature-emissivity separation for LWIR sensing using MCMC

Joshua Ash, Joseph Meola

Proceedings Volume 9840, 98401O (2016) https://doi.org/10.1117/12.2223263

KEYWORDS: Long wavelength infrared, Infrared sensors, Infrared radiation, Signal processing, Temperature metrology, Monte Carlo methods, Databases, Sensors, Error analysis, Data modeling

Read Abstract +

Proceedings Article | 13 June 2014 Paper

A unifying perspective of coherent and non-coherent change detection

Joshua Ash

Proceedings Volume 9093, 909309 (2014) https://doi.org/10.1117/12.2054338

KEYWORDS: Detection and tracking algorithms, Charge-coupled devices, Expectation maximization algorithms, Synthetic aperture radar, Radar, Algorithm development, X band, Image processing, Distortion, Device simulation

Read Abstract +

Proceedings Article | 23 May 2013 Paper

Joint imaging and change detection for robust exploitation in interrupted SAR environments

Joshua Ash

Proceedings Volume 8746, 87460J (2013) https://doi.org/10.1117/12.2019019

KEYWORDS: Synthetic aperture radar, Imaging systems, Radar, Charge-coupled devices, Radar imaging, Distortion, Coherence imaging, Reconstruction algorithms, Fourier transforms, Data modeling

Read Abstract +

Proceedings Article | 25 May 2012 Paper

Empirical space-time statistical models for inhomogeneous acoustic propagation environments

Joshua Ash

Proceedings Volume 8388, 83880G (2012) https://doi.org/10.1117/12.919762

KEYWORDS: Data modeling, Sensors, Acoustics, Error analysis, Statistical analysis, Statistical modeling, Atmospheric modeling, Atmospheric propagation, Environmental sensing, Distortion

Read Abstract +

Proceedings Article | 3 May 2012 Paper

Wide angle SAR data for target discrimination research

Kerry Dungan, Joshua Ash, John Nehrbass, Jason Parker, LeRoy Gorham, Steven Scarborough

Proceedings Volume 8394, 83940M (2012) https://doi.org/10.1117/12.925077

KEYWORDS: Sensors, Synthetic aperture radar, Fourier transforms, Detection and tracking algorithms, 3D acquisition, Reflectors, Algorithm development, Data modeling, Digital video discs

Read Abstract +

Proceedings Article | 20 May 2011 Paper

Extension and implementation of a model-based approach to hyperspectral change detection

Joseph Meola, Michael Eismann, Randolph Moses, Joshua Ash

Proceedings Volume 8048, 804806 (2011) https://doi.org/10.1117/12.883265

KEYWORDS: Reflectivity, Data modeling, Sensors, Model-based design, Visible radiation, Vegetation, Optical filters, Detection and tracking algorithms, Radiative transfer, Target detection

Read Abstract +

Proceedings Article | 12 May 2011 Paper

Supersonic projectile models for asynchronous shooter localization

Richard Kozick, Gene Whipps, Joshua Ash

Proceedings Volume 8046, 804604 (2011) https://doi.org/10.1117/12.884700

KEYWORDS: Sensors, Statistical analysis, Radon, Statistical modeling, Data modeling, Monte Carlo methods, Algorithm development, 3D modeling, Cadmium, Sensor networks

Read Abstract +

Proceedings Article | 5 May 2011 Paper

Performance analysis of sparse 3D SAR imaging

Christian Austin, Joshua Ash, Randolph Moses

Proceedings Volume 8051, 80510D (2011) https://doi.org/10.1117/12.888951

KEYWORDS: Scattering, Signal to noise ratio, 3D image processing, Synthetic aperture radar, Rayleigh scattering, Radar, Reconstruction algorithms, Data centers, Associative arrays, Detection and tracking algorithms

Read Abstract +

Proceedings Article | 13 May 2010 Paper

A model-based approach to hyperspectral change detection

Joseph Meola, Michael Eismann, Randolph Moses, Joshua Ash

Proceedings Volume 7695, 76951G (2010) https://doi.org/10.1117/12.849559

KEYWORDS: Reflectivity, Data modeling, Error analysis, Sensors, Optimization (mathematics), Adaptive optics, Atmospheric modeling, Detection and tracking algorithms, Atmospheric sensing, Model-based design

Read Abstract +

Proceedings Article | 19 April 2010 Paper

Analysis of motion disambiguation using multi-channel circular SAR

Ahmed Fasih, Carl Rossler, Joshua Ash, Randolph Moses

Proceedings Volume 7699, 76990J (2010) https://doi.org/10.1117/12.850233

KEYWORDS: Antennas, Synthetic aperture radar, Receivers, Radar, Statistical analysis, 3D image processing, Associative arrays, Motion models, Neodymium, Monte Carlo methods

Read Abstract +

Proceedings Article | 5 May 2009 Paper

Time-delay estimation in time-warping environments

Joshua Ash, Randolph Moses

Proceedings Volume 7333, 73330T (2009) https://doi.org/10.1117/12.818971

KEYWORDS: Interference (communication), Signal to noise ratio, Acoustics, Signal processing, Statistical analysis, Receivers, Ranging, Error analysis, Correlation function, Terbium

Read Abstract +

Proceedings Article | 15 April 2008 Paper

Recursive SAR imaging

Randolph Moses, Joshua Ash

Proceedings Volume 6970, 69700P (2008) https://doi.org/10.1117/12.786307

KEYWORDS: Synthetic aperture radar, Scattering, Radar, Apodization, Image acquisition, Image processing, Convolution, Image quality, Video, Autoregressive models

Read Abstract +