However, there has been a constant effort toward automatic
ice concentration estimation from SAR imagery [7]–[13]. A
two-step approach is normally used [7]–[13]: SAR image features
are first designed and calculated to describe the differences
between ice and water; then, a regression model is built
upon those features to estimate the ice concentration. Empirical
linear regression and multiple-layer perceptron are examples of
such regression models [9], [10], [12], [13].