RAIRO-Theor. Inf. Appl.
Volume 45, Number 1, January-March 2011ICTCS 09
|Page(s)||163 - 180|
|Published online||15 March 2011|
Strategies to scan pictures with automata based on Wang tiles
Dipartimento di Scienze dell'Informazione,
Università degli Studi di Milano,
Via Comelico 39/41, 20135 Milano, Italy; firstname.lastname@example.org
2 IEIIT, Consiglio Nazionale delle Ricerche, Via Golgi 42, 20133 Milano, Italy; email@example.com
Accepted: 2 December 2010
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.
Mathematics Subject Classification: 68Q05 / 68Q10 / 68Q45
Key words: Picture languages / 2D languages / Wang systems / 2D automata / scanning strategies
© EDP Sciences, 2011
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