Gray-scale handwritten character recognition based on principal features

Hee Seon Park, Sang Yup Kim, Seong Whan Lee

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

6 Citations (Scopus)

Abstract

Principal component analysis (PCA) has been a major field of study in image compression, coding technique, or pattern recognition, particularly for classification and feature subset selection. Based on its success in these domains, character recognition methods using PCA have attracted considerable attention in recent years. In this paper, we propose a novel scheme for gray-scale handwritten character recognition based on principal of training set are projected onto the subspaces defined by their most important eigenvectors. Here, the significant eigenvectors of each class are chosen as those with the largest associated eigenvalues. These eigenvectors can be thought of as a set of feature vectors, that is, principal features. In this paper, we consider the minimum error subspace classifier for classification. It is a discriminant function derived from the PCA. We discriminate an unknown test character during the recognition phase by projection and classification. The recognition is performed by projecting a test image onto the subspace defined by the dominant eigenvectors of each class and then choosing the class corresponding to the subspace with the minimum error as the class of the test character. In order to verify the performance of the proposed scheme for gray-scale handwritten character recognition, experiments with the IPTP CDROM1 database have been carried out. Of the 12,000 samples available on this CD, 9,000 and 3,000 have been sued for training and testing, respectively. In this paper, we investigated the influence of the number eigencharacters used to define the subspace as well as the number of training characters for each character. Experimental results reveal that the proposed scheme based on principal features has advantages over other character recognition approaches in its speed and simplicity, learning capacity, and insensitivity to variations in the handwritten character images.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Pages40-49
Number of pages10
Volume3027
ISBN (Print)0819424382
Publication statusPublished - 1997
Externally publishedYes
EventDocument Recognition IV - San Jose, CA, USA
Duration: 1997 Feb 121997 Feb 13

Other

OtherDocument Recognition IV
CitySan Jose, CA, USA
Period97/2/1297/2/13

Fingerprint

character recognition
Character recognition
gray scale
Eigenvalues and eigenfunctions
eigenvectors
principal components analysis
Principal component analysis
education
Image compression
classifiers
pattern recognition
learning
set theory
Pattern recognition
coding
Classifiers
eigenvalues
projection
sensitivity
Testing

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Park, H. S., Kim, S. Y., & Lee, S. W. (1997). Gray-scale handwritten character recognition based on principal features. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 3027, pp. 40-49). Society of Photo-Optical Instrumentation Engineers.

Gray-scale handwritten character recognition based on principal features. / Park, Hee Seon; Kim, Sang Yup; Lee, Seong Whan.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3027 Society of Photo-Optical Instrumentation Engineers, 1997. p. 40-49.

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

Park, HS, Kim, SY & Lee, SW 1997, Gray-scale handwritten character recognition based on principal features. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 3027, Society of Photo-Optical Instrumentation Engineers, pp. 40-49, Document Recognition IV, San Jose, CA, USA, 97/2/12.
Park HS, Kim SY, Lee SW. Gray-scale handwritten character recognition based on principal features. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3027. Society of Photo-Optical Instrumentation Engineers. 1997. p. 40-49
Park, Hee Seon ; Kim, Sang Yup ; Lee, Seong Whan. / Gray-scale handwritten character recognition based on principal features. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3027 Society of Photo-Optical Instrumentation Engineers, 1997. pp. 40-49
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