Optical Character Recognition with Enhanced-ring-projection (ERP) Algorithm and Wavelet Transform

Kai Man Lee, Yuan Yan Tang

Research output: Chapter in book/report/conference proceedingConference proceedingpeer-review

Abstract

In this paper, we present a new feature extraction technique called ”ERP”. For Transformation-ring-projection (TRP) method, it loses indispensable information by reducing the dimensionality of a two dimensional pattern. In particular, it is not rotation invariant in all cases. For example, it has identical classified curves for mirror characters like ”人” (man) and ”入” (enter). In an effort to correct this deficiency, ERP is developed to enhance the TRP method.

The advantages of proposed ERP method in this problem domain are:

i) It keeps enough information to distinguish mirror characters during transformation from a two dimensional pattern.

ii) It is authentic rotation invariant.

In pattern recognition, the entire task can be divided into four phases, namely, data acquisition, data processing, feature extraction and classification.
Original languageEnglish
Title of host publicationProceedings of the 4th IAPR International Workshop on Document Analysis Systems, DAS 2000
Pages197-210
Number of pages14
Publication statusPublished - 10 Dec 2000
Externally publishedYes
Event4th IAPR International Workshop on Document Analysis Systems, DAS 2000 - Rio Othon Palace Hotel, Rio de Janeiro, Brazil
Duration: 10 Dec 200013 Dec 2000

Conference

Conference4th IAPR International Workshop on Document Analysis Systems, DAS 2000
Country/TerritoryBrazil
CityRio de Janeiro
Period10/12/0013/12/00

User-Defined Keywords

  • Enhanced-ring-projection (ERP)
  • character group
  • the local maximal modulus of wavelet transform and unique pattern scheme

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