Accuracy (for each rotation angle)

 Dataset Link Brodatz MondialMarmi OUTEX_0045 Vectorial

Pairwise comparisons

Numeric subscripts indicate the distance $d$ at which the features have been computed. Symbol || indicates concatenation of features.
Neighbourhood type:

 Subscript Meaning * Four-direction neighbourhood ^\circ Digital circle

Conversion from rotation dependent into rotation invariant features:

 Symbol Meaning \mathbf{f}^' Average of the co-occurrence matrices \bar{\mathbf{f}} Average of the features \Delta\mathbf{f} Range of the features \delta\mathbf{f} Mean absolute deviation of the features \hat{\mathbf{f}} Discrete Fourier transform of the features

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