๐”– Bobbio Scriptorium
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Picture language


Book ID
113139144
Publisher
Elsevier Science
Year
1983
Weight
499 KB
Volume
25
Category
Article
ISSN
0011-684X

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Let = {u; d; r; l} be the chain-code picture alphabet such that u (d; r; l) denotes the graphics command to move the drawing pen up (down, right, left) in the 2D Cartesian plane. It is known that the picture membership problem can be solved in polynomial time for each context-free language over {u;

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Two different types of models called puzzle languages and recognizable picture languages describing digitized pictures in a two-dimensional plane have been introduced in the 1990s. We review here these models, reporting the main results already proved. We also give a few new results.