1. A method for identifying regular geometric structures in a document page, comprising: for a document page for which a set of page elements have been identified, providing for: identifying geometric relations among a subset of the page elements, from a predefined set of geometric relations; identifying a geometric structure comprising regular rows and regular columns, based on the identified geometric relations; applying constraints of a definition of a regular geometric structure to the identified geometric structure; and where the subset of page elements includes regular rows and regular columns forming a geometric structure which meets the constraints of the definition of a regular geometric structure, identifying the subset of the page elements as forming a regular geometric structure.