The nature of statistical learning theory
The nature of statistical learning theory
Self-organizing maps
Computer and Robot Vision
Neural maps in remote sensing image analysis
Neural Networks - 2003 Special issue: Neural network analysis of complex scientific data: Astronomy and geosciences
Computer Processing of Remotely-Sensed Images: An Introduction
Computer Processing of Remotely-Sensed Images: An Introduction
SPPRA '08 Proceedings of the Fifth IASTED International Conference on Signal Processing, Pattern Recognition and Applications
Fuzzy-input fuzzy-output one-against-all support vector machines
KES'07/WIRN'07 Proceedings of the 11th international conference, KES 2007 and XVII Italian workshop on neural networks conference on Knowledge-based intelligent information and engineering systems: Part III
Support Vector Machines and MLP for automatic classification of seismic signals at Stromboli volcano
Proceedings of the 2009 conference on Neural Nets WIRN09: Proceedings of the 19th Italian Workshop on Neural Nets, Vietri sul Mare, Salerno, Italy, May 28--30 2009
Proceedings of the 2011 conference on Neural Nets WIRN10: Proceedings of the 20th Italian Workshop on Neural Nets
Hi-index | 0.00 |
In this paper we investigate the performance of the Kohonen's self organizing map (SOM) as a strategy for the analysis of multi-spectral and multi-resolution remote sensed images. The paper faces the problem of data fusion, by extracting and combining multi-spectral and textural features. Moreover we address the problem of low-quantity and low-quality of labelled pixels in the training set, investigating a two-step strategy: in the first step (unsupervised training) we use a large unlabelled data set to train a SOM, in the second step a limited number of labelled data is used to assign each SOM node to one informative class. Self Organized Maps are shown to be effective way to discover the intrinsic structure of data. When the SOM is used as a classifier, as here, a majority voting technique is usually used to associate nodes with informative classes. This procedure allows to obtain a SOM output grid which contains labelled and unlabelled nodes. Particularly in the framework of remote sensing, the unlabelled nodes may be important, since they are associated with new classes present in the image, or with the so-called mixed pixels, which represent an area on the ground composed of more then one land-cover class. Comparing the results of the proposed SOM-based strategy and the results of a supervised network such as SVM we show that the unlabelled nodes of the SOM are associated with high percentage to mixed pixels.