Apparatus and a method for logically processing a composite graph in a formatted document

An apparatus for logically processing a composite graph in a formatted document, comprising a computer processor and a computer readable storage medium which stores a plurality of computer-executable instructions, wherein the computer-executable instructions, when being executed by the computer processor, cause the computer processor to:

• extract a composite graph block in the formatted document;
• parse the formatted document to obtain a text element included therein;
• extract a cutline element from the text element;
• detect correlativity between the composite graph block and the extracted cutline element, wherein the correlativity detection comprises:
• determining the number of in-text-illustration composite graphs included in the composite graph block;
• in the case that the composite graph block only contains one in-text-illustration composite graph, selecting a cutline element having a distance to the one in-text-illustration composite graph smaller than a preset distance, and making the selected cutline element as a cutline element relating to the one in-text-illustration composite graph;
• and
• in the case that the composite graph block contains multiple in-text-illustration composite graphs, making the multiple in-text-illustration composite graphs and all of the parsed cutline elements as a vertex of a bipartite graph respectively, so as to use the bipartite graph to determine the correlativity between the multiple in-text-illustration composite graphs and the cutline elements;
• and
• store the detected correlativity.