Improved Spatial Information Based Semisupervised Classification of Remote Sensing Images

Abstract

Motivation in the use of semisupervised learning method is because of its ability to strategically explore and use abundantly available unlabeled samples along with the limited number of labeled samples, as seen in the remote sensing (RS) imagery. In this direction, the present article proposes a semisupervised classification model with spatial information based self-learning methodology to classify land covers in RS images. The model uses granular neural network (GNN) as the base classifier because of its customizable network architecture that is functionally interpretable and costs less computational complexity. Architecture of GNN is governed by fuzzy if-then rules that are generated from fuzzy granulation of input feature space. We have used an improved spatial neighborhood learning method for better understanding of data distribution in a semisupervised framework. The method collects the information with collaborative opinions of two independent information extraction approaches, i.e., based on mutual neighborhood criteria and class map of unlabeled samples. Superiority of the proposed model with existing methods are established with different RS images in terms of various performance measurement indexes.

Keywords

• Fuzzy granulation
• granular neural network (GNN)
• land cover classification
• neural networks
• pattern recognition
• remote sensing (RS)