A New Hyperspectral Image Classification Approach Using Fractal Dimension of Spectral Response Curve

In classification of hyperspectral images, methods like PCA, LDA, and ICA have simple structure and relatively good results, but an important deficiency is that these methodsare not sensitive to the order of primary features. For every pixel of a hyperspectral image we have a vector of measuredquantities corresponding to reflection coefficients of consecutive wavelengths which is called as spectral reflectance curve (SRC). So the ordinance of measured data might have some information that could be useful in classification. SRCs due to the high degree of snuggle they have, could be considered as fractals. Inthis paper we suggest a new approach of fractal dimension feature extraction based on FD of adjacent overlapping intervalsand using their principal components as feature vector elements. These new features applied as inputs of a statistical per pixelclassifier of segmented image, produced by K-means clusteringmethod, whit Mahalanobis distance. A majority voting step ended classification process. We achieved meaningful improvement of correct classification rate comparing to classic PCA method.

Keywords:

Classification , Feature Extraction , Fractal Dimension , Hyperspectral Image , Spectral reflectance curve