Sea ice classification using fast learning neural networks

• Main Authors: Dawson, M. S., Fung, A. K., Manry, M. T.
• Format: Other/Unknown Material
• Language: unknown
• Published: 1992
• Subjects: 48; Sea ice
• Online Access: http://ntrs.nasa.gov/search.jsp?R=19930063845

A first learning neural network approach to the classification of sea ice is presented. The fast learning (FL) neural network and a multilayer perceptron (MLP) trained with backpropagation learning (BP network) were tested on simulated data sets based on the known dominant scattering characteristics of the target class. Four classes were used in the data simulation: open water, thick lossy saline ice, thin saline ice, and multiyear ice. The BP network was unable to consistently converge to less than 25 percent error while the FL method yielded an average error of approximately 1 percent on the first iteration of training. The fast learning method presented can significantly reduce the CPU time necessary to train a neural network as well as consistently yield higher classification accuracy than BP networks.