INFORMys: A Flexible Invoice-Like Form-Reader System
IEEE Transactions on Pattern Analysis and Machine Intelligence
A method for connecting disappeared junction patterns on frame lines in form documents
ICDAR '97 Proceedings of the 4th International Conference on Document Analysis and Recognition
A framework for validating recognized results in understanding table-form document images
ICDAR '95 Proceedings of the Third International Conference on Document Analysis and Recognition (Volume 2) - Volume 2
A Recognition Method for Touching Japanese Handwritten Characters
ICDAR '99 Proceedings of the Fifth International Conference on Document Analysis and Recognition
A Recursive Analysis for Form Cell Recognition
ICDAR '01 Proceedings of the Sixth International Conference on Document Analysis and Recognition
Form Reading based on Form-type Identification and Form-data Recognition
ICDAR '03 Proceedings of the Seventh International Conference on Document Analysis and Recognition - Volume 2
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A document-form identification method based on constellation matching of targets is proposed. Mathematical analysis shows that the method achieves a high identification rate by preparing plural targets. The method consists of two parts: (i) extraction of targets such as important keywords in a document by template matching between recogised characters and word strings in a keyword dictionary, and (ii) analysis of the positional or semantic relationship between the targets by point-pattern matching between these targets and word location information in the keyword dictionary. All characters in the document are recognised by means of a conventional character-recognition method. An automatic keyword-determination method, which is necessary for making a keyword dictionary beforehand, is also proposed. This method selects the most suitable keywords from a general word dictionary by measuring the uniqueness of keywords and the stability of their recognition. Experiments using 671 sample documents with 107 different forms in total confirmed that (i) the keyword-determination method can determine sets of keywords automatically in 92.5% of 107 different forms and (ii) that the form-identification method can correctly identify 97.1% of 671 document samples at a rejection rate 2.9%.