1 July 2002 Information efficiency in hyperspectral imaging systems
Author Affiliations +
J. of Electronic Imaging, 11(3), (2002). doi:10.1117/1.1482097
In this work we develop a method for assessing the information density and efficiency of hyperspectral imaging systems that have spectral bands of nonuniform width. Imaging system designs with spectral bands of nonuniform width can efficiently gather information about a scene by allocating bandwidth among the bands according to their information content. The information efficiency is the ratio of information density to data density and is a function of the scene’s spectral radiance, hyperspectral system design, and signal-to-noise ratio. The assessment can be used to produce an efficient system design. For example, one approach to determining the number and width of the spectral bands for an informationefficient design is to begin with a design that has a single band and then to iteratively divide a band into two bands until no further division improves the system’s efficiency. Two experiments illustrate this approach, one using a simple mathematical model for the scene spectral-radiance autocorrelation function and the other using the deterministic spectral-radiance autocorrelation function of a hyperspectral image from NASA’s Advanced Solid-State Array Spectroradiometer. The approach could be used either to determine a fixed system design or to dynamically control a system with variable-width spectral bands (e.g., using on-board processing in a satellite system).
Stephen E. Reichenbach, Luyin Cao, Ram Mohan Narayanan, "Information efficiency in hyperspectral imaging systems," Journal of Electronic Imaging 11(3), (1 July 2002). http://dx.doi.org/10.1117/1.1482097

Imaging systems

Hyperspectral imaging

Signal to noise ratio

Interference (communication)

Fourier transforms

Mathematical modeling

Image acquisition

Back to Top