PT Chapter
AU Klaus Broelemann
   Anjan Dutta
   Xiaoyi Jiang
   Josep Llados
TI Hierarchical Plausibility-Graphs for Symbol Spotting in Graphical Documents
BT Graphics Recognition. Current Trends and Challenges
PY 2014
BP 25
EP 37
VL 8746
DI 10.1007/978-3-662-44854-0_3
AB Graph representation of graphical documents often suffers from noise such as spurious nodes and edges, and their discontinuity. In general these errors occur during the low-level image processing viz. binarization, skeletonization, vectorization etc. Hierarchical graph representation is a nice and efficient way to solve this kind of problem by hierarchically merging node-node and node-edge depending on the distance. But the creation of hierarchical graph representing the graphical information often uses hard thresholds on the distance to create the hierarchical nodes (next state) of the lower nodes (or states) of a graph. As a result, the representation often loses useful information. This paper introduces plausibilities to the nodes of hierarchical graph as a function of distance and proposes a modified algorithm for matching subgraphs of the hierarchical graphs. The plausibility-annotated nodes help to improve the performance of the matching algorithm on two hierarchical structures. To show the potential of this approach, we conduct an experiment with the SESYD dataset.
ER