Robust reconstruction of damaged character images on the form documents

Kwanyong Lee, Hyeran Byun, Yillbyung Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution


It is very common that the filled-in character images in the form documents touch, cross, or overlap the formatted-line images. In that case, it is not easy to extract characters correctly because the shapes of characters are transformed by line images. In this paper, we propose a new method to reconstruct the character images damaged by the preprinted lines of documents. The method consists of two stages - the character decomposition stage and the character reconstruction stage. In the character decomposition stage, an input character is decomposed into some line-elements which are units of reconstruction, through the hierarchical steps. In the character reconstruction stage, the various reconstruction methods are used to restore the characters according to the 4 types of line-elements. To evaluate the performance of the proposed method objectively, we used simple recognition modules on CENPARMI handwritten digits and NIST handwritten alphabets. Experimental results showed that the difference of the recognition rates between the original characters without any damages by lines and the characters reconstructed by the proposed method is within about 1%, and the shapes of reconstructed character images are almost the same as those of the original ones.

Original languageEnglish
Title of host publicationGraphics Recognition
Subtitle of host publicationAlgorithms and Systems - 2nd International Workshop, GREC 1997, Selected Papers
EditorsKarl Tombre, Atul K. Chhabra
PublisherSpringer Verlag
Number of pages14
ISBN (Print)3540643818, 9783540643814
Publication statusPublished - 1998
Event2nd International Workshop on Graphics Recognition, GREC 1997 - Nancy, France
Duration: 1997 Aug 221997 Aug 23

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Other2nd International Workshop on Graphics Recognition, GREC 1997

Bibliographical note

Publisher Copyright:
© Springer-Verlag Berlin Heidelberg 1998.

All Science Journal Classification (ASJC) codes

  • Theoretical Computer Science
  • Computer Science(all)


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