TY - JOUR
T1 - A Novel Evolutionary Swarm Fuzzy Clustering Approach for Hyperspectral Imagery
AU - Ghamisi, Pedram
AU - Ali, Abder-Rahman
AU - Couceiro, Micael S.
AU - Benediktsson, Jon Atli
PY - 2015
Y1 - 2015
N2 - In land cover assessment, classes often gradually change from one to another. Therefore, it is difficult to allocate sharp boundaries between different classes of interest. To overcome this issue and model such conditions, fuzzy techniques that resemble human reasoning have been proposed as alternatives. Fuzzy C-means is the most common fuzzy clustering technique, but its concept is based on a local search mechanism and its convergence rate is rather slow, especially considering high-dimensional problems (e.g., in processing of hyperspectral images). Here, in order to address those shortcomings of hard approaches, a new approach is proposed, i.e., fuzzy C-means which is optimized by fractional order Darwinian particle swarm optimization. In addition, to speed up the clustering process, the histogram of image intensities is used during the clustering process instead of the raw image data. Furthermore, the proposed clustering approach is combined with support vector machine classification to accurately classify hyperspectral images. The new classification framework is applied on two well-known hyperspectral data sets; Indian Pines and Salinas. Experimental results confirm that the proposed swarm-based clustering approach can group hyperspectral images accurately in a time-efficient manner compared to other existing clustering techniques.
AB - In land cover assessment, classes often gradually change from one to another. Therefore, it is difficult to allocate sharp boundaries between different classes of interest. To overcome this issue and model such conditions, fuzzy techniques that resemble human reasoning have been proposed as alternatives. Fuzzy C-means is the most common fuzzy clustering technique, but its concept is based on a local search mechanism and its convergence rate is rather slow, especially considering high-dimensional problems (e.g., in processing of hyperspectral images). Here, in order to address those shortcomings of hard approaches, a new approach is proposed, i.e., fuzzy C-means which is optimized by fractional order Darwinian particle swarm optimization. In addition, to speed up the clustering process, the histogram of image intensities is used during the clustering process instead of the raw image data. Furthermore, the proposed clustering approach is combined with support vector machine classification to accurately classify hyperspectral images. The new classification framework is applied on two well-known hyperspectral data sets; Indian Pines and Salinas. Experimental results confirm that the proposed swarm-based clustering approach can group hyperspectral images accurately in a time-efficient manner compared to other existing clustering techniques.
KW - Accuracy
KW - Clustering algorithms
KW - Clustering methods
KW - Hyperspectral imaging
KW - Support vector machines
KW - Training
KW - Accuracy
KW - Clustering algorithms
KW - Clustering methods
KW - Hyperspectral imaging
KW - Support vector machines
KW - Training
U2 - 10.1109/JSTARS.2015.2398835
DO - 10.1109/JSTARS.2015.2398835
M3 - Article
SP - 2447
EP - 2456
JO - IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing (Volume:8 , Issue: 6 )
JF - IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing (Volume:8 , Issue: 6 )
ER -