Results of the pairwise texture classification experiments.

<p>Top row: classification of textures D21 and D28. Middle row: classification of textures D21 and D77. Bottom row: classification of textures D28 and D77. Experiments with patch sizes of 3 × 3 and 5 × 5 pixels are shown in left and right columns, respectively. Note that the <i>y</i>-axes of the plots are scaled differently to allow appreciation of the effect of using multiple sparse representations.