0000000000144582

AUTHOR

Nathan Longbotham

0000-0002-5283-001x

showing 4 related works from this author

Kernel Anomalous Change Detection for Remote Sensing Imagery

2020

Anomalous change detection (ACD) is an important problem in remote sensing image processing. Detecting not only pervasive but also anomalous or extreme changes has many applications for which methodologies are available. This paper introduces a nonlinear extension of a full family of anomalous change detectors. In particular, we focus on algorithms that utilize Gaussian and elliptically contoured (EC) distribution and extend them to their nonlinear counterparts based on the theory of reproducing kernels' Hilbert space. We illustrate the performance of the kernel methods introduced in both pervasive and ACD problems with real and simulated changes in multispectral and hyperspectral imagery w…

FOS: Computer and information sciencesComputer scienceGaussianComputer Vision and Pattern Recognition (cs.CV)Multispectral imageComputer Science - Computer Vision and Pattern Recognition0211 other engineering and technologiesMachine Learning (stat.ML)02 engineering and technologysymbols.namesakeStatistics - Machine LearningElectrical and Electronic Engineering021101 geological & geomatics engineeringbusiness.industryHilbert spaceHyperspectral imagingPattern recognitionNonlinear systemKernel methodKernel (image processing)13. Climate actionsymbolsGeneral Earth and Planetary SciencesArtificial intelligencebusinessChange detection
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Measuring the Spatial and Spectral Performance of WorldView-3

2015

The new WorldView-3 satellite provides a unique combination of very high spatial resolution and super-spectral capabilities. This presentation explores the practical and theoretical usefulness of this platform as compared against other hyperspectral and multispectral sensors.

business.industryComputer scienceMultispectral imageHigh spatial resolutionHyperspectral imagingSatelliteComputer visionArtificial intelligenceEarth remote sensingImage sensorbusinessImage resolutionRemote sensingFourier Transform Spectroscopy and Hyperspectral Imaging and Sounding of the Environment
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Prelaunch assessment of worldview-3 information content

2014

The upcoming WorldView-3 satellite is designed to collect unique data by combining very-high spatial resolution (VHR) with observation bands in the short wave infrared (SWIR) in addition to the visible and near-infrared (VNIR) multispectral and panchromatic bands currently available on the VHR WorldView-2 system. These SWIR bands were specifically selected in order to target unique reflectance and absorption features presented by various surface materials and should, therefore, significantly improve the platforms information content for many image mining applications. This presentation explores the information content available to the WorldView-3 platform in two ways. First, second-order st…

Computer scienceMultispectral imageInformation sourceHyperspectral imagingSatelliteMutual informationImage resolutionPanchromatic filmRemote sensingVNIR2014 6th Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (WHISPERS)
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A family of kernel anomaly change detectors

2014

This paper introduces the nonlinear extension of the anomaly change detection algorithms in [1] based on the theory of reproducing kernels. The presented methods generalize their linear counterparts, under both the Gaussian and elliptically-contoured assumptions, and produce both improved detection accuracies and reduced false alarm rates. We study the Gaussianity of the data in Hilbert spaces with kernel dependence estimates, provide low-rank kernel versions to cope with the high computational cost of the methods, and give prescriptions about the selection of the kernel functions and their parameters. We illustrate the performance of the introduced kernel methods in both pervasive and anom…

business.industryMachine learningcomputer.software_genreKernel principal component analysisKernel methodKernel embedding of distributionsPolynomial kernelVariable kernel density estimationKernel (statistics)Radial basis function kernelArtificial intelligencebusinesscomputerAlgorithmChange detectionMathematics2014 6th Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (WHISPERS)
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