Shadow Removal from VNIR Hyperspectral Remote Sensing Imagery with Endmember Signature Analysis

Date

2015-04-22

Author

Omruuzun, Fatih
Baskurt, Didem Ozisik
Daglayan, Hazan
Çetin, Yasemin

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This study aims to develop an effective regional shadow removal algorithm using rich spectral information existing in hyperspectral imagery. The proposed method benefits from spectral similarity of shadow and neighboring nonshadow pixels regardless of the intensity values. Although the shadow area has lower reflectance values due to inadequacy of incident light, it is expected that this area contains similar spectral characteristics with nonshadow area. Using this assumption, the endmembers in both shadowed and nonshadow area are extracted by Vertex Component Analysis (VCA). On the other hand, HySime algorithm overcomes estimating number of endmembers, which is one of the challenging parts in hyperspectral unmixing. Therefore, two sets of endmembers are extracted independently for both shadowed and nonshadow area. The proposed study aims at revealing the relation between these two endmember sets by comparing their pairwise similarities. Finally, reflectance values of shadowed pixels are re-calculated separately for each spectral band of hyperspectral image using this information.

Subject Keywords

Airborne hyperspectral imaging, Shadow removal, Hyperspectral unmixing, Hyperspectral unmixing

URI

https://hdl.handle.net/11511/57322

DOI

https://doi.org/10.1117/12.2190066

Collections

Graduate School of Informatics, Conference / Seminar

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Citation Formats

F. Omruuzun, D. O. Baskurt, H. Daglayan, and Y. Çetin, “Shadow Removal from VNIR Hyperspectral Remote Sensing Imagery with Endmember Signature Analysis,” 2015, vol. 9482, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/57322.