An Efficient Feature Extraction Method, Global Between Maximum and Local Within Minimum, and Its Applications

Figure 3

Two-dimensional projections of the handwritten digits, respectively, by using seven related subspace learning methods. “+” denotes 0, “∘” denotes 1, “*” denotes 2, “×” denotes 3, “□” denotes 4, “⋄” denotes 5, “Δ” denotes 6, “∇” denotes 7, “⊲” denotes 8, “⊳” denotes 9.

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