Journal
REMOTE SENSING
Volume 9, Issue 6, Pages -Publisher
MDPI AG
DOI: 10.3390/rs9060558
Keywords
hyperspectral remote sensing; endmember extraction; multi-objective; particle swarm optimization
Categories
Funding
- National Natural Science Foundation of China [61471274, 41431175]
- Natural Science Foundation of Hubei Province [2014CFB193]
- Fundamental Research Funds for the Central Universities [2042016kf0152]
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Endmember extraction (EE) is one of the most important issues in hyperspectral mixture analysis. It is also a challenging task due to the intrinsic complexity of remote sensing images and the lack of priori knowledge. In recent years, a number of EE methods have been developed, where several different optimization objectives have been proposed from different perspectives. In all of these methods, only one objective function has to be optimized, which represents a specific characteristic of endmembers. However, one single-objective function may not be able to express all the characteristics of endmembers from various aspects, which would not be powerful enough to provide satisfactory unmixing results because of the complexity of remote sensing images. In this paper, a multiobjective discrete particle swarm optimization algorithm (MODPSO) is utilized to tackle the problem of EE, where two objective functions, namely, volume maximization (VM) and root-mean-square error (RMSE) minimization are simultaneously optimized. Experimental results on two real hyperspectral images show the superiority of the proposed MODPSO with respect to the single objective D-PSO method, and MODPSO still needs further improvement on the optimization of the VM with respect to other approaches.
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