Publication Type:

Journal Article

Source:

Advances in Intelligent Systems and Computing, ICACCI 2015; Kochi; India, Volume 384, Springer Verlag, p.521-528 (2016)

ISBN:

9783319230351

URL:

https://www.scopus.com/inward/record.uri?eid=2-s2.0-84945941480&partnerID=40&md5=21ac5c37772713e27e957bceb2fa9d60

Abstract:

A significant challenge in hyperspectral remote sensing image analysis is the presence of noise, which has a negative impact on various data analysis methods such as image classification, target detection, unmixing etc. In order to address this issue, hyperspectral image denoising is used as a preprocessing step prior to classification. This paper presents an effective, fast and reliable method for denoising hyperspectral images followed by classification based on sparse representation of hyperspectral data. The use of Legendre-Fenchel transform for denoising is an effective spatial preprocessing step to improve the classification accuracy. The main advantage of Legendre-Fenchel transform is that it removes the noise in the image while preserving the sharp edges. The sparsity based algorithm namely, Orthogonal Matching Pursuit (OMP) is used for classification. The experiment is done on Indian Pines data set acquired byAirborneVisible Infrared Imaging Spectrometer (AVIRIS) sensor. It is inferred that the denoising of hyperspectral images before classification improves the Overall Accuracy of classification. The effect of preprocessing using Legendre Fenchel transformation is shown by comparing the classification results with Total Variation (TV) based denoising. A statistical comparison of the accuracies obtained on standard hyperspectral data before and after denoising is also analysed to show the effectiveness of the proposed method. The experimental result analysis shows that for 10% training set the proposed method leads to the improvement in Overall Accuracy from 83.18% to 91.06%, Average Accuracy from 86.17% to 92.78% and Kappa coefficient from 0.8079 to 0.8981. © Springer International Publishing Switzerland 2016.

Cite this Research Publication

N. Haridas, Aswathy, C., and Soman, K. P., “Hyperspectral image denoising using legendre-fenchel transform for improved sparsity based classification”, Advances in Intelligent Systems and Computing, vol. 384, pp. 521-528, 2016.

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