Istituto di Scienza e Tecnologie dell'Informazione     
Carlucci L. Texture languages. Internal note IEI-B71-04, 1971.
A formal system for defining languages for textures is given. A texture is considered to be generated by a unit pattern which is repeated. According to some placement rule, over a given area. In the formal system here defined a texture is described by a tree whose subtrees represent the occurrences of the unit pattern. Predicates are introduced on trees: A tree is considered to be a texture belonging to a specified language if the unit pattern occurrences composing it satisfy an assigned predicate, which is the formalization of a placement rule.

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