Prof. Lori A. Magruder Profile

Prof. Lori A. Magruder

Associate Professor at Univ of Texas at Austin

SPIE Involvement:

Conference Chair | Author | Editor

Publications (19)

Proceedings Article | 5 June 2024 Presentation + Paper

Feature extraction using VIPER: The geospatial vector, image, point cloud, elevation, and raster toolbox

Jeffrey Perry, Donald Maze-England, Lori Magruder

Proceedings Volume 13049, 1304909 (2024) https://doi.org/10.1117/12.3013903

KEYWORDS: Point clouds, Feature extraction, Raster graphics, Machine learning, 3D modeling, Electrooptical modeling, Data processing

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Proceedings Article | 5 June 2024 Presentation + Paper

Correcting SAR-derived DEMs with ICESat-2 using deep learning

Eric Guenther, Amy Neuenschwander, Lori Magruder, Donald Maze-England

Proceedings Volume 13049, 1304908 (2024) https://doi.org/10.1117/12.3013897

KEYWORDS: Synthetic aperture radar, Education and training, Data modeling, Deep learning, Convolutional neural networks, Vegetation

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Proceedings Article | 5 June 2024 Presentation + Paper

A deep residual network implementation for satellite-derived altimetry identification and classification

Jeffrey Perry, Amy Neuenschwander, Matthew Holwill, Lori Magruder

Proceedings Volume 13049, 130490A (2024) https://doi.org/10.1117/12.3021196

KEYWORDS: Data modeling, Photons, Education and training, Network architectures, Raster graphics, Calibration, Performance modeling, Satellites, Machine learning, Cross validation

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Proceedings Article | 12 June 2023 Presentation + Paper

PhoREAL: increasing spatial and temporal data accessibly of ICESat-2 through open-source Python repository

Amy Neuenschwander, Lori Magruder

Proceedings Volume 12537, 125370E (2023) https://doi.org/10.1117/12.2667098

KEYWORDS: Vegetation, LIDAR, Windows, Visualization, Statistical analysis, Ice, Human-machine interfaces, Data conversion, Clouds, Reflection

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Proceedings Article | 12 June 2023 Presentation + Paper

A simple point cloud file format and open-source implementation for geospatial analysis and software development

Jeffery Perry, Donald Maze-England, Lori Magruder

Proceedings Volume 12537, 125370F (2023) https://doi.org/10.1117/12.2667116

KEYWORDS: Point clouds, Data storage, LIDAR, C++, Machine learning, Software development, Data modeling, 3D modeling

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Proceedings Article | 3 June 2022 Presentation + Paper

An overview of ICESat-2 bathymetric capabilities and discoveries

Lori Magruder, Jonathan Markel, Christine Simurda

Proceedings Volume 12110, 1211009 (2022) https://doi.org/10.1117/12.2624913

KEYWORDS: Water, LIDAR, Satellites, Earth observing sensors, Satellite imaging, Multispectral imaging

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Proceedings Article | 10 May 2018 Presentation + Paper

Space-based photon-counting laser altimetry for global applications

Lori Magruder, Amy Neuenschwander

Proceedings Volume 10636, 106360S (2018) https://doi.org/10.1117/12.2303979

KEYWORDS: LIDAR, Algorithm development, Vegetation, Photon counting, Satellites, Interference (communication), Clouds, Signal detection, Photodetectors, Computer simulations

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SPIE Journal Paper | 6 October 2016

Using dual-wavelength, full-waveform airborne lidar for surface classification and vegetation characterization

Holly Leigh, Lori Magruder

JARS, Vol. 10, Issue 04, 045001, (October 2016) https://doi.org/10.1117/12.10.1117/1.JRS.10.045001

KEYWORDS: LIDAR, Near infrared, Vegetation, Feature extraction, Sensors, Pulsed laser operation, Reflectivity, Remote sensing, Signal processing, Ecosystems

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Proceedings Article | 13 May 2016 Paper

Automated feature extraction for 3-dimensional point clouds

Lori Magruder, Holly Leigh, Alexander Soderlund, Bradley Clymer, Jessica Baer, Amy Neuenschwander

Proceedings Volume 9832, 98320F (2016) https://doi.org/10.1117/12.2223845

KEYWORDS: LIDAR, Feature extraction, Clouds, Data modeling, RGB color model, Image segmentation, Vegetation, Raster graphics, Algorithm development, Visualization

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SPIE Journal Paper | 22 May 2013 Open Access

Automated bare earth extraction technique for complex topography in light detection and ranging surveys

Terry Stevenson, Lori Magruder, Amy Neuenschwander, Brian Bradford

JARS, Vol. 7, Issue 01, 073560, (May 2013) https://doi.org/10.1117/12.10.1117/1.JRS.7.073560

KEYWORDS: LIDAR, Vegetation, Buildings, Clouds, Data modeling, Image segmentation, Image processing, Bridges, Image filtering, Digital filtering

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Proceedings Article | 14 May 2012 Paper

A LADAR bare earth extraction technique for diverse topography and complex scenes

Amy Neuenschwander, Terry Stevenson, Lori Magruder

Proceedings Volume 8379, 83790E (2012) https://doi.org/10.1117/12.919132

KEYWORDS: LIDAR, Data modeling, Vegetation, Image segmentation, Ions, Clouds, Remote sensing, Optical filters, Algorithm development, Agriculture

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Proceedings Article | 14 May 2012 Paper

Noise filtering techniques for photon-counting ladar data

Lori Magruder, Michael Wharton, Kevin Stout, Amy Neuenschwander

Proceedings Volume 8379, 83790Q (2012) https://doi.org/10.1117/12.919139

KEYWORDS: Photons, LIDAR, Signal to noise ratio, Signal detection, Edge detection, Interference (communication), Electronic filtering, Signal processing, Statistical analysis, Data acquisition

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Proceedings Article | 7 June 2011 Paper

Terrain classification of ladar data for bare earth determination

Amy Neuenschwander, Lori Magruder

Proceedings Volume 8037, 80370E (2011) https://doi.org/10.1117/12.884128

KEYWORDS: LIDAR, Vegetation, Surface roughness, Data modeling, Data acquisition, Algorithm development, Digital filtering, Modulation, Signal processing, Data analysis

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Proceedings Article | 4 May 2010 Paper

Terrain classification of ladar data over Haitian urban environments using a lower envelope follower and adaptive gradient operator

Amy Neuenschwander, Melba Crawford, Lori Magruder, Christopher Weed, Richard Cannata, Dale Fried, Robert Knowlton, Richard Heinrichs

Proceedings Volume 7684, 768408 (2010) https://doi.org/10.1117/12.866033

KEYWORDS: LIDAR, Vegetation, Data modeling, Buildings, Modulation, Earthquakes, Floods, Data acquisition, Optical scanning systems, 3D modeling

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Proceedings Article | 29 April 2010 Paper

Obstruction detection comparison of small-footprint full-waveform and discrete return lidar

Lori Magruder, Amy Neuenschwander, Scott Marmillion, Scott Tweddale

Proceedings Volume 7684, 768410 (2010) https://doi.org/10.1117/12.850274

KEYWORDS: LIDAR, Vegetation, Digital filtering, Associative arrays, Electro optical modeling, Systems modeling, Signal detection, Geodesy, Laser energy, Ranging

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SPIE Journal Paper | 1 January 2010

Lidar waveform stacking techniques for faint ground return extraction

Lori Magruder, Amy Neuenschwander, Scott Marmillion

JARS, Vol. 4, Issue 01, 043501, (January 2010) https://doi.org/10.1117/12.10.1117/1.3299657

KEYWORDS: LIDAR, Reflection, Sensors, Ranging, Data acquisition, Clouds, Algorithm development, Data processing, Signal detection, Geodesy

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SPIE Journal Paper | 1 August 2009

Landcover classification of small-footprint, full-waveform lidar data

Amy Neuenschwander, Lori Magruder, Marcus Tyler

JARS, Vol. 3, Issue 01, 033544, (August 2009) https://doi.org/10.1117/12.10.1117/1.3229944

KEYWORDS: LIDAR, Vegetation, Fourier transforms, Reflectivity, Feature selection, Image classification, Feature extraction, Ecosystems, Composites, Multispectral imaging

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Proceedings Article | 2 May 2009 Paper

Fundamental relationships inherent to lidar waveforms for classification

Amy Neuenschwander, Lori Magruder, Alexis Londo, Scott Tweddale

Proceedings Volume 7323, 73230A (2009) https://doi.org/10.1117/12.818607

KEYWORDS: LIDAR, Vegetation, Laser energy, Defense and security, Feature extraction, Ecosystems, Reflectivity, Ranging, Composites, Laser applications

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