“…From the structural point of view, it is widely accepted to define the texture as a conjunction of two components: i) a texture element (texel), which is the fundamental microstructure in the image [22], and ii) a set of rules for texel placement into the field of view. Such components can be used in several applications like shape from texture [2], texture synthesis [13,11,4], texture compression [14], among others. Furthermore, the texel can be used as a reference to improve the performance in classification [6,12] and segmentation [18] tasks, and to achieve scale invariant texture analysis [21].…”