Pattern Expression Nonnegative Matrix Factorization: Algorithm and Applications to Blind Source Separation

Figure 1

The basis {𝑊₁,𝑊₂}/{𝑊^′₁,𝑊^′₂} which obeys/violates (a) the first point; (b) the second point; (c) the third point in the definition of the pattern basis.

(a)

(b)

(c)