ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., II-8, 179-185, 2014
http://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/II-8/179/2014/
doi:10.5194/isprsannals-II-8-179-2014
© Author(s) 2014. This work is distributed
under the Creative Commons Attribution 3.0 License.
 
27 Nov 2014
Sensor Simulation based Hyperspectral Image Enhancement with Minimal Spectral Distortion
A. Khandelwal1 and K. S. Rajan2 1Dept. of Computer Science and Engineering, University of Minnesota, 200 Union Street SE, Minneapolis, USA
2Lab for Spatial Informatics, International Institute of Information Technology, Gachibowli, Hyderabad 500032, India
Keywords: Hyperspectral Image Fusion, Spectral Response Functions, Spectral Distortion, Sensor Simulation, Vector Decomposition Abstract. In the recent past, remotely sensed data with high spectral resolution has been made available and has been explored for various agricultural and geological applications. While these spectral signatures of the objects of interest provide important clues, the relatively poor spatial resolution of these hyperspectral images limits their utility and performance. In this context, hyperspectral image enhancement using multispectral data has been actively pursued to improve spatial resolution of such imageries and thus enhancing its use for classification and composition analysis in various applications. But, this also poses a challenge in terms of managing the trade-off between improved spatial detail and the distortion of spectral signatures in these fused outcomes. This paper proposes a strategy of using vector decomposition, as a model to transfer the spatial detail from relatively higher resolution data, in association with sensor simulation to generate a fused hyperspectral image while preserving the inter band spectral variability. The results of this approach demonstrates that the spectral separation between classes has been better captured and thus helped improve classification accuracies over mixed pixels of the original low resolution hyperspectral data. In addition, the quantitative analysis using a rank-correlation metric shows the appropriateness of the proposed method over the other known approaches with regard to preserving the spectral signatures.
Conference paper (PDF, 2522 KB)


Citation: Khandelwal, A. and Rajan, K. S.: Sensor Simulation based Hyperspectral Image Enhancement with Minimal Spectral Distortion, ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., II-8, 179-185, doi:10.5194/isprsannals-II-8-179-2014, 2014.

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