Abstract
Capturing images in thousands of contiguous spectral bands has been made simpler with the emergence of technology in the field of hyperspectral remote sensing. Despite of these huge data available for analysis, Hyperspectral images (HSI) face many challenges due to high dimensionality, noise, spectral mixing and computational complexity. Several preprocessing methods can be used to overcome the above mentioned issues. In this paper, an enhancement technique using 2D-Empirical Wavelet Transform (EWT) is used as a preprocessing step for the HSI reconstruction prior to sparsity based classification (Subspace Pursuit and Orthogonal Matching Pursuit). The effectiveness of the proposed method is proved by comparing the classification results obtained with and without applying preprocessing. Experimental analysis shows a significant improvement in the classification accuracies i.e., for 40\(\%\) of training samples, OMP shows an improvement in overall classification accuracy from 66.12\(\%\) to 93.20\(\%\) and SP shows an improvement from 66.36\(\%\) to 92.74\(\%\).
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References
Chen, Y., Nasrabadi, N.M., Tran, T.D.: Hyperspectral image classification via kernel sparse representation. IEEE Transactions on Geoscience and Remote Sensing 51, 217–231 (2013). doi:10.1109/TGRS.2012.2201730
Chen, Y., Nasrabadi, N.M., Tran, T.D.: Hyperspectral image classification using dictionary-based sparse representation. IEEE Trans. Geosci. Remote Sens. 49, 3973–3985 (2011). doi:10.1109/TGRS.2011.2129595
Chen, Y., Nasrabadi, N.M., Tran, T.D.: Simultaneous joint sparsity model for target detection in hyperspectral imagery. IEEE Geoscience and Remote Sensing Letters 8, 676–680 (2011). doi:10.1109/LGRS.2010.2099640
Chen, Y., Nasrabadi, N.M., Tran, T.D.: Sparse representation for target detection in hyperspectral imagery. IEEE J. Sel. Topics Signal Process. 5, 629–640 (2011). doi:10.1109/JSTSP.2011.2113170
Demir, B., Erturk, S.: Empirical mode decomposition of hyperspectral images for support vector machine classification. IEEE Transactions on Geoscience and Remote Sensing 48, 4071–4084 (2010). doi:10.1109/TGRS.2010.2070510
Gormus, E.T., Canagarajah, N., Achim, A.: Dimensionality reduction of hyperspectral images using empirical mode decompositions and wavelets. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 5, 1821–1830 (2012). doi:10.1109/JSTARS.2012.2203587
Gilles, J., Tran, G., Osher, S.: 2D Empirical transforms wavelets, ridgelets, and curvelets revisited. SIAM Journal on Imaging Sciences 7, 157–186 (2014)
Gilles, J.: Empirical wavelet transform. IEEE Transactions on Signal Processing 61, 3999–4010 (2013). doi:10.1137/130923774
Huang, N.E., Shen, Z., Long, S.R., et al.: The empirical mode decomposition and the hilbert spectrum for nonlinear and non-stationary time series analysis. In: Proceedings of the Royal Society of London A: Mathematical Physical and Engineering Sciences, vol. 454, pp. 903–995. The Royal Society, March 1998. doi:10.1098/rspa.1998.0193
Jensen, J.R.: Introductory Digital Image Processing A Remote Sensing Perspective. Prentice Hall Inc., Upper Saddle River (1996)
Tropp, J.A., Gilbert, A.C.: Signal recovery from random measurements via orthogonal matching pursuit. IEEE Transactions on Information Theory 53, 4655–4666 (2007). doi:10.1109/TIT.2007.909108
Dai, W., Milenkovic, O.: Subspace pursuit for compressive sensing signal reconstruction. IEEE Transactions on Information Theory 55, 2230–2249 (2009). doi:10.1109/TIT.2009.2016006
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Nidhin Prabhakar, T.V., Geetha, P. (2016). Empirical Wavelet Transform for Improved Hyperspectral Image Classification. In: Berretti, S., Thampi, S., Srivastava, P. (eds) Intelligent Systems Technologies and Applications. Advances in Intelligent Systems and Computing, vol 384. Springer, Cham. https://doi.org/10.1007/978-3-319-23036-8_34
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DOI: https://doi.org/10.1007/978-3-319-23036-8_34
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