Award Date

1-1-2000

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Electrical Engineering

First Committee Member

Lori Mann Bruce

Number of Pages

110

Abstract

An automated subpixel target detection system has been designed and tested for use with remotely sensed hyperspectral images. A database of hyperspectral signatures was created to test the system using a variety of Gaussian shaped targets. The signal-to-noise ratio of the targets varied from -95dB to -50dB. The system utilizes a wavelet-based method (discrete wavelet transform) to extract an energy feature vector from each input pixel signature. The dimensionality of the feature vector is reduced to a one-dimensional feature scalar through the process of linear discriminant analysis. Signature classification is determined by nearest mean criterion that is used to assign each input signature to one of two classes, no target present or target present. Classification accuracy ranged from nearly 60% with target SNR at -95dB without any a priori knowledge of the target, to 100% with target SNR at -50dB and a priori knowledge about the location of the target within the spectral bands of the signature.

Keywords

Anomalies; Detecting; Hyperspectral; Remotely; Sensed; Signatures; Transforms Wavelets

Controlled Subject

Electrical engineering; Environmental engineering; Remote sensing

File Format

pdf

File Size

3153.92 KB

Degree Grantor

University of Nevada, Las Vegas

Language

English

Permissions

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Identifier

https://doi.org/10.25669/c43v-1dp2


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