A Connecting Method for Disappeared Corner Patterns in Form Documents

Form document structure analysis is an intrinsic technique. However, It has fundamental problems because interruptions of lines and noise cause low-quality form images. This paper focuses on connecting disappeared comer patterns. Our method has two stages for making correct connections, noise elimination, in which lines whose two end points meet no other lines are eliminated and object line selection, where only frame lines of forms are selected. Experiments with form images demonstrated the feasibility of this method.