| 摘要 |
Initially an embedding module ( 22 ) determines an embedding of a lattice in a two-dimensional plane. The embedding module ( 22 ) then processes the initial embedding to generate a planar graph in which no links cross. The planar graph is then simplified by a link encoding module ( 24 ) and data representing the lattice structure is generated by a shape encoding module ( 26 )-in which the simplified planar graph is represented by a shape encoding ( 42 ) identifying the numbers of links bounding areas defined by the planar graph and data identifying the locations of those areas within the planar graph; and a link list ( 43 ) identifying the modifications made to the lattice structure by the link encoding module ( 24 ). These encodings are such that the same substructures within a lattice are represented using the same data and hence are suitable for compression using conventional techniques. |
