Subpixel object detection and fraction estimation in hyperspectral imagery

A. Evan Iverson

doi:10.1117/12.280585

4 August 1997 Subpixel object detection and fraction estimation in hyperspectral imagery

A. Evan Iverson

Proceedings Volume 3071, Algorithms for Multispectral and Hyperspectral Imagery III; (1997) https://doi.org/10.1117/12.280585
Event: AeroSense '97, 1997, Orlando, FL, United States

Abstract

The detection of objects of subpixel size in high-spectral- resolution imagery is a subject of much current interest. In this paper, we discuss this subject from a practical perspective and then develop a mathematical foundation for the detection of subpixel objects for which the spectral signature is either known or unknown. We capitalize on techniques from linear algebra that theoretically allow the projection of each pixel in the image onto a subspace orthogonal to the subspace defined by the interfering spectra. Using the properties of projection operators, a technique is developed for estimating an orthogonal-subspace projection operator using the singular value decomposition when interfering background spectra are unknown. We then show how a vector operator of interest. Finally, we discuss algorithm performance characterization and present some preliminary results based on Monte Carlo simulations.

Citation Download Citation

A. Evan Iverson "Subpixel object detection and fraction estimation in hyperspectral imagery", Proc. SPIE 3071, Algorithms for Multispectral and Hyperspectral Imagery III, (4 August 1997); https://doi.org/10.1117/12.280585

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