Form identification method
First Claim
1. A form identification method of identifying types of forms, comprising the steps of:
- extracting one or a plurality of cells, lines, or character lines included in an inputted form from the inputted form;
extracting one or a plurality of coordinates, as one or a plurality of inputted features, of a center of each of the cells, lines, or character lines as said one or a plurality of features of the form;
rotating either said one or a plurality of inputted features or a registered feature of a form which has previously been registered on a 90°
unit basis;
correcting said one or a plurality of inputted features by a micro angle on the basis of a micro inclination angle detected from the cells, lines or character lines;
checking a matching of the one or a plurality of inputted features with the registered feature;
setting the angle at which said one or a plurality of inputted features 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.
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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.
58 Citations
2 Claims
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1. A form identification method of identifying types of forms, comprising the steps of:
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extracting one or a plurality of cells, lines, or character lines included in an inputted form from the inputted form; extracting one or a plurality of coordinates, as one or a plurality of inputted features, of a center of each of the cells, lines, or character lines as said one or a plurality of features of the form; rotating either said one or a plurality of inputted features or a registered feature of a form which has previously been registered on a 90°
unit basis;correcting said one or a plurality of inputted features by a micro angle on the basis of a micro inclination angle detected from the cells, lines or character lines; checking a matching of the one or a plurality of inputted features with the registered feature; setting the angle at which said one or a plurality of inputted features 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. - View Dependent Claims (2)
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Specification
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- Resources
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Current AssigneeHitachi Computer Peripherals Company Limited (Hitachi, Ltd.), Hitachi, Ltd.
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Original AssigneeHitachi Computer Peripherals Company Limited (Hitachi, Ltd.), Hitachi, Ltd.
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InventorsShima, Yoshihiro
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Primary Examiner(s)Bali, Vikkram
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Assistant Examiner(s)LAROSE, COLIN M
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Application NumberUS10/041,603Publication NumberTime in Patent Office1,706 DaysField of Search382/209, 382216-218, 382/224, 382/288, 382/296, 382/297US Class Current382/216CPC Class CodesG06V 30/412 Layout analysis of document...
