Fast Wavelet-based Algorithms for Multiresolutional Decomposition and Feature Extraction of Hyperspectral Signatures

Authors

Lori M. Bruce, University of Nevada, Las VegasFollow
Jiang Li, University of Nevada, Las VegasFollow

Document Type

Conference Proceeding

Publication Date

4-5-1999

Publication Title

Proceedings of the 1999 Algorithms for Multispectral and Hyperspectral Imagery V

Publisher

SPIE

Volume

3717

First page number:

72

Last page number:

81

Abstract

Spectral features are often extracted from multispectral/hyperspectral data using a multiresolutional decomposition known as the spectral fingerprint. While the spectral fingerprint method has proven to be quite powerful, it has also shown several shortcomings: (1) its implementation requires multiple convolutions with Laplacian-of-Gaussian filters which are computationally expensive, (2) it requires a truncation of the filter impulse response which can cause spurious errors, and (3) it provides information about the sizes and areas of radiance features but not the shapes. It is proposed that a wavelet- based spectral fingerprint can overcome these shortcomings while maintaining the advantages of the traditional method. In this study, we investigate the use of the wavelet transform modulus-maximus method to generate a wavelet-based spectral fingerprint. The computation of the wavelet-based fingerprint is based on recent fast wavelet algorithms. The analyses consists of two parts: (1) the computational expense of the new method is compared with the computational costs of current methods, and (2) the outputs of the wavelet-based methods are compared with those of current methods to determine any practical differences in the resulting spectral fingerprints.

Keywords

Algorithms; Multispectral imaging; Wavelets (Mathematics); Wavelet transforms

Disciplines

Electrical and Computer Engineering | Electromagnetics and Photonics | Engineering | Signal Processing

Language

English

Permissions

Use Find in Your Library, contact the author, or interlibrary loan to garner a copy of the item. Publisher policy does not allow archiving the final published version. If a post-print (author's peer-reviewed manuscript) is allowed and available, or publisher policy changes, the item will be deposited.

Repository Citation

Bruce, L. M., Li, J. (1999). Fast Wavelet-based Algorithms for Multiresolutional Decomposition and Feature Extraction of Hyperspectral Signatures. Proceedings of the 1999 Algorithms for Multispectral and Hyperspectral Imagery V, 3717 72-81. SPIE.