US 2002/0159639 A1 · Form identification method

Abstract

A form identification method which can identify forms without errors even if a form is inputted from a scanner in different direction or the form is enlarged/shrunk. A form registration method which enables change/modification of forms when form types are pre-registered. Inputted points as features are extracted from the form, modification of enlargement/shrinkage, rotation, or skew is made to the inputted points. Form types are identified based on minimum distances between the inputted point and pre-registered dictionary points. When registering a similar form type, warning can be displayed on the screen. In a system a dictionary registration station, a form identification station, and a form edit station are connected via a communication network. Each station operates in interlocking manner, identifies inputted forms, and registers them into a dictionary.

Claims5

Dependent claims

A form identification method of identifying types of forms by checking matching of features of a plurality of forms which have previously been registered with features of inputted forms on the basis of position coordinates, comprising the steps of:

extracting one or a plurality of cells, lines, or character lines included in the form from the inputted forms;
extracting coordinates, as input features, of centers of the cells, lines, or character lines as said features of the forms;
rotating either said inputted feature or a registered feature of the form which has previously been registered on a 90° unit basis;
correcting said inputted feature by a micro angle on the basis of a micro inclination angle detected from the cells, lines, or character lines;
checking the matching of the inputted feature with the registered feature;
setting the angle at which said inputted feature most coincides with said registered feature to a direction of the inputted form;
and
setting the type of form having the most coincident registered feature to a form identification result.

5 more elements

Dependencies are inferred from the claim text.

Form identification method

Life of this patent

Form identification method

Life of this patent

Abstract

Claims5