A simple indicator for estimating the noise level of a hyperspectral data cube for earth observation missions

Eyal Ben-Dor, Gila Notesco

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A method for estimating the level of noise of a hyperspectral data cube is proposed. The method includes noise reduction using the Minimum Noise Fraction (MNF) transform and mapping the spectral dissimilarity between the pixels in the resulting noise-reduced radiance image, as well as in the original noisy radiance image, using the Spectral Angle Mapper (SAM) algorithm. Comparing the two maps, on a pixel by pixel basis, gives a value indicating the addition of noise to the spectrum of each pixel. An average value for the entire image is calculated, defined as the Image Noise Indicator (INI). In practice, this value indicates the quality of the data. Combining the INI value with the level of radiance enables estimating the Image Noise Level (INL). The method was applied and examined on a noisy synthetic image and then implemented for over 20 acquired images from different hyperspectral sensors and their noise level was estimated. Further examination showed that the INI value is independent of the heterogeneity of the hyperspectral data cube. The INI value, indicating the noise level, might increase as a geo-reference procedure is applied to hyperspectral data cube. The INI-INL can also be used as a quality indicator (QI) in the ongoing effort to objectively certify hyperspectral remote sensing images for practical usages.

Original languageEnglish
Title of host publication66th International Astronautical Congress 2015, IAC 2015
Subtitle of host publicationSpace - The Gateway for Mankind's Future
PublisherInternational Astronautical Federation, IAF
Pages3105-3114
Number of pages10
ISBN (Electronic)9781510818934
StatePublished - 2015
Event66th International Astronautical Congress 2015: Space - The Gateway for Mankind's Future, IAC 2015 - Jerusalem, Israel
Duration: 12 Oct 201516 Oct 2015

Publication series

NameProceedings of the International Astronautical Congress, IAC
Volume4
ISSN (Print)0074-1795

Conference

Conference66th International Astronautical Congress 2015: Space - The Gateway for Mankind's Future, IAC 2015
Country/TerritoryIsrael
CityJerusalem
Period12/10/1516/10/15

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