Figure 1From: Gauss–Laguerre wavelet textural feature fusion with geometrical information for facial expression identification(a) Real part of GL function; n = 4, K = 1, j = 2. (b) Real part of GL CHFs. Variation of filter in spatial domain with fixed scale, k = 0,1, …,4, and n = 1,2, …,5.Back to article page