### Abstract

This paper describes a method for assessing the information density and efficiency of hyperspectral imaging systems that have spectral bands of non-uniform width. The information density of the acquired signal is computed as a function of the hyperspectral system design, signal-to-noise ratio, and statistics of the scene radiance. The information efficiency is the ratio of the information density to the data density. The assessment can be used in system design, for example, to determine the number and size of the spectral bands. With this analysis, hyperspectral imaging systems can be tailored for scenes that are non-homogeneous with respect to spectral wavelength. If the scene spectral autocorrelation at each wavelength is different, then the information density at each wavelength is also different, suggesting that the spectral bands should have variable width. Two experiments illustrate the approach, one using a simple model for the scene radiance autocorrelation function and the other using the deterministic autocorrelation function of a hyperspectral image from NASA's Advanced Solid-state Array Spectroradiometer (ASAS). The design with non-uniform bandwidths yields greater information efficiency than an optimal design with uniform bandwidths.

Original language | English (US) |
---|---|

Pages (from-to) | 72-78 |

Number of pages | 7 |

Journal | Proceedings of SPIE - The International Society for Optical Engineering |

Volume | 4388 |

DOIs | |

State | Published - Jan 1 2001 |

Event | Visual Information Processing X - Orlando,FL, United States Duration: Apr 19 2001 → Apr 20 2001 |

### Fingerprint

### Keywords

- Hyperspectral imaging
- Imaging systems
- Information theory

### ASJC Scopus subject areas

- Electrical and Electronic Engineering
- Condensed Matter Physics

### Cite this

**Information theoretic assessment and design of hyperspectral imaging systems with non-uniform bandwidths.** / Cao, L.; Reichenbach, S. E.; Narayanan, R. M.

Research output: Contribution to journal › Conference article

*Proceedings of SPIE - The International Society for Optical Engineering*, vol. 4388, pp. 72-78. https://doi.org/10.1117/12.438243

}

TY - JOUR

T1 - Information theoretic assessment and design of hyperspectral imaging systems with non-uniform bandwidths

AU - Cao, L.

AU - Reichenbach, S. E.

AU - Narayanan, R. M.

PY - 2001/1/1

Y1 - 2001/1/1

N2 - This paper describes a method for assessing the information density and efficiency of hyperspectral imaging systems that have spectral bands of non-uniform width. The information density of the acquired signal is computed as a function of the hyperspectral system design, signal-to-noise ratio, and statistics of the scene radiance. The information efficiency is the ratio of the information density to the data density. The assessment can be used in system design, for example, to determine the number and size of the spectral bands. With this analysis, hyperspectral imaging systems can be tailored for scenes that are non-homogeneous with respect to spectral wavelength. If the scene spectral autocorrelation at each wavelength is different, then the information density at each wavelength is also different, suggesting that the spectral bands should have variable width. Two experiments illustrate the approach, one using a simple model for the scene radiance autocorrelation function and the other using the deterministic autocorrelation function of a hyperspectral image from NASA's Advanced Solid-state Array Spectroradiometer (ASAS). The design with non-uniform bandwidths yields greater information efficiency than an optimal design with uniform bandwidths.

AB - This paper describes a method for assessing the information density and efficiency of hyperspectral imaging systems that have spectral bands of non-uniform width. The information density of the acquired signal is computed as a function of the hyperspectral system design, signal-to-noise ratio, and statistics of the scene radiance. The information efficiency is the ratio of the information density to the data density. The assessment can be used in system design, for example, to determine the number and size of the spectral bands. With this analysis, hyperspectral imaging systems can be tailored for scenes that are non-homogeneous with respect to spectral wavelength. If the scene spectral autocorrelation at each wavelength is different, then the information density at each wavelength is also different, suggesting that the spectral bands should have variable width. Two experiments illustrate the approach, one using a simple model for the scene radiance autocorrelation function and the other using the deterministic autocorrelation function of a hyperspectral image from NASA's Advanced Solid-state Array Spectroradiometer (ASAS). The design with non-uniform bandwidths yields greater information efficiency than an optimal design with uniform bandwidths.

KW - Hyperspectral imaging

KW - Imaging systems

KW - Information theory

UR - http://www.scopus.com/inward/record.url?scp=0035154047&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035154047&partnerID=8YFLogxK

U2 - 10.1117/12.438243

DO - 10.1117/12.438243

M3 - Conference article

AN - SCOPUS:0035154047

VL - 4388

SP - 72

EP - 78

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

SN - 0277-786X

ER -