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Table 1 Comparison of the methods

From: Reduction of rounding noise and lifting steps in non-separable four-dimensional quadruple lifting integer wavelet transform

Structure Lifting steps Rounding operators Memory accessing
Separable 4D (existing I) 16 192 1D
Non-separable 3D (existing II) 12 96 1D and 3D
Non-separable 2D and 3D (proposed I) 12 72 1D, 2D, and 3D
Non-separable 2D (proposed II) 13 96 1D and 2D