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picture languages

RAIRO - Theoretical Informatics and Applications (1)

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Strategies to scan pictures with automata based on Wang tiles
Violetta Lonati, Matteo Pradella
Journal:

RAIRO - Theoretical Informatics and Applications / Volume 45 / Issue 1 / January 2011

Published online by Cambridge University Press:

15 March 2011, pp. 163-180

Print publication:

January 2011
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Wang automata are devices for picture language recognition recently introduced by us, which characterize the class REC of recognizable picture languages. Thus, Wang automata are equivalent to tiling systems or online tessellation acceptors, and are based like Wang systems on labeled Wang tiles. The present work focus on scanning strategies, to prove that the ones Wang automata are based on are those following four kinds of movements: boustrophedonic, “L-like”, “U-like”, and spirals.