A Novel Unsupervised Approach for Land Classification Based on Touzi Scattering Vector Model in the Context of Very High Resolution PolSAR Imagery

摘要

With the popularization of very high resolution polarimetric synthetic aperture radar image dataset, it is essential to re-investigate the classification scheme for 2-D land cases.The Touzi scattering vector model, a unique and roll-invariant decomposition solution, is employed to extract the scattering properties of different land covers.The parameters of Touzi decomposition act as input dataset for initial classification.A novel classifying algorithm is put forward by means of integrating the Touzi decomposition with conventional Wishart statistical models.Quantitative experiments are then conducted using uninhabited aerial vehicle synthetic aperture radar sample data for evaluating the performance of this new proposed approach.It can be concluded from the experimental results that the new proposed method is superior to the classical method in terms of producer accuracy, user accuracy, and overall accuracy.