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Article

A Novel Change Detection Approach Based on Spectral Unmixing from Stacked Multitemporal Remote Sensing Images with a Variability of Endmembers

by 1,*, 1, 2,3, 1 and 1
1
Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, China
2
National Satellite Ocean Application Service, Ministry of Natural Resources, Beijing 100081, China
3
Key Laboratory of Space Ocean Remote Sensing and Application, Ministry of Natural Resources, Beijing 100081, China
*
Author to whom correspondence should be addressed.
Academic Editor: Johannes R. Sveinsson
Remote Sens. 2021, 13(13), 2550; https://0-doi-org.brum.beds.ac.uk/10.3390/rs13132550
Received: 10 May 2021 / Revised: 25 June 2021 / Accepted: 25 June 2021 / Published: 29 June 2021
(This article belongs to the Special Issue Recent Advances in Hyperspectral Image Processing)
Due to the high temporal repetition rates, median/low spatial resolution remote sensing images are the main data source of change detection (CD). It is worth noting that they contain a large number of mixed pixels, which makes adequately capturing the details in the resulting thematic map challenging. The spectral unmixing (SU) method is a potential solution to this problem, as it decomposes mixed pixels into a set of fractions of the land covers. However, there are accumulated errors in the fractional difference images, which lead to a poor change detection results. Meanwhile, the spectra variation of the endmember and the heterogeneity of the land cover materials cannot be fully considered in the traditional framework. In order to solve this problem, a novel change detection approach with image stacking and dividing based on spectral unmixing while considering the variability of endmembers (CD_SDSUVE) was proposed in this paper. Firstly, the remote sensing images at different times were stacked into a unified framework. After that, several patch images were produced by dividing the stacked images so that the similar endmembers according to each land cover can be completely extracted and compared. Finally, the multiple endmember spectral mixture analysis (MESMA) is performed, and the abundant images were combined to produce the entire change detection thematic map. This proposed algorithm was implemented and compared to four relevant state-of-the-art methods on three experimental data, whereby the results confirmed that it effectively improved the accuracy. In the simulated data, the overall accuracy (OA) and Kappa coefficient values were 99.61% and 0.99. In the two real data, the maximum of OA were acquired with 93.26% and 80.85%, which gained 14.88% and 13.42% over the worst results at most. Meanwhile, the Kappa coefficient value was consistent with the OA. View Full-Text
Keywords: spectral unmixing; change detection; stacked images; endmember spectral unmixing; change detection; stacked images; endmember
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MDPI and ACS Style

Wu, K.; Chen, T.; Xu, Y.; Song, D.; Li, H. A Novel Change Detection Approach Based on Spectral Unmixing from Stacked Multitemporal Remote Sensing Images with a Variability of Endmembers. Remote Sens. 2021, 13, 2550. https://0-doi-org.brum.beds.ac.uk/10.3390/rs13132550

AMA Style

Wu K, Chen T, Xu Y, Song D, Li H. A Novel Change Detection Approach Based on Spectral Unmixing from Stacked Multitemporal Remote Sensing Images with a Variability of Endmembers. Remote Sensing. 2021; 13(13):2550. https://0-doi-org.brum.beds.ac.uk/10.3390/rs13132550

Chicago/Turabian Style

Wu, Ke, Tao Chen, Ying Xu, Dongwei Song, and Haishan Li. 2021. "A Novel Change Detection Approach Based on Spectral Unmixing from Stacked Multitemporal Remote Sensing Images with a Variability of Endmembers" Remote Sensing 13, no. 13: 2550. https://0-doi-org.brum.beds.ac.uk/10.3390/rs13132550

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