| 摘要 |
<p>An item of information is coded in the form of a graphic mark, with several connected components. For coding, the information item to be coded is transformed into a tree. Thereafter, the tree is transformed into a graphic mark; a node of the tree is coded by a connected component of the graphic mark with as many interior connected components as the node has children. For decoding, the connected components of the graphic mark are considered and the graphic mark is transformed into a tree; a node of the tree corresponds to a connected component of the graphic mark and the node of the tree has as many children as the corresponding connected component has interior connected components. The tree is thereafter transformed into information. The graphic mark obtained in accordance with the coding is decodable, even after deformations: recognition of connected components is resistant to the deformations of the graphic mark.</p> |
