Method and system for data extraction from images of semi-structured documents

A method of extracting data from one or more fields in an image of a document, the method comprising:

• obtaining a text representation of the image of the document;
• constructing a graph for storing one or more features values of one or more text fragments in the text representation of the image of the document and one or more links between the one or more text fragments;
• computing one or more features of the one or more text fragments and the one or more links using a cascade classification;
• generating one or more hypotheses about the one or more text fragments belonging to the one or more fields in the image of the document;
• generating one or more combinations of the one or more hypotheses;
• selecting a combination of the one or more hypotheses;
• and
• extracting data from the one or more fields in the image of the document based on the selected combination of the one or more hypotheses.