Effects of sharpening on hyperspectral exploitation

Sylvia S. Shen

doi:10.1117/12.478791

2 August 2002 Effects of sharpening on hyperspectral exploitation

Sylvia S. Shen

Proceedings Volume 4725, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery VIII; (2002) https://doi.org/10.1117/12.478791
Event: AeroSense 2002, 2002, Orlando, FL, United States

Abstract

This paper describes a study effort to investigate the impact of SHARP (Sharpening Hyperspectral and Reprojection), a hyperspectral sharpening algorithm, on the utility of the sharpened data for nonliteral exploitation for the 0.4 to 0.9 micron wavelength region. The goals are to investigate if SHARP maintains radiometric integrity and to quantify its effects on various exploitation applications. Reduced spatial resolution hyperspectral data cubes and panchromatic images were generated from HYDICE (Hyperspectral Digital Imagery Collection Experiment) data cubes. SHARP was applied to each panchromatic image and reduced spatial resolution hyperspectral cube pair ro produce a sharpened hyperspectral cube of the same spatial resolution as the panchromatic image. Two nonliteral exploitation functions (i.e. anomaly detection and material identification) were performed on the reduced spatial resolution hyperspectral cubes, the sharpened hyperspectral cubes, and the original HYDICE cubes to facilitate performance comparison. Results showed that sharpening a lower spatial resolution hyperspectral cube with a higher spatial resolution panchromatic image can not fully recover the capability provided by the original higher spatial resolution cube to detect anomalies or identify materials. Results also showed that such fusion can outperform the use of the lower spatial resolution hyperspectral cube by itself, but only for anomaly detection in a desert scene. Sharpening did not improve anomaly detection in a forest scene, nor did it improve material identification in either setting. Results also indicated that although SHARP has maintained the visual interpretability of the data, it did not preserve the radiometric fidelity crucial to nonliteral exploitation.

Citation Download Citation

Sylvia S. Shen "Effects of sharpening on hyperspectral exploitation", Proc. SPIE 4725, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery VIII, (2 August 2002); https://doi.org/10.1117/12.478791

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