Authors: S. Abirami, D. Manjula
Addresses: Department of Computer Science and Engineering, Anna University, Guindy, Chennai 600 025, India. ' Department of Computer Science and Engineering, Anna University, Guindy, Chennai 600 025, India
Abstract: Classification and identification of language in a biscript document is one of the important steps in the design of an OCR system for successful analysis and recognition. This paper presents architecture for script recognition of bilingual document images (Tamil, English), which specifically takes the challenges of recognition at character level by predicting the script of word image using its initial character, thereby adapting to various font faces and sizes. This recogniser models every character as Tetra bit values (TBV), which corresponds to the spatial spread, derived from the segmented grids of the character. We employed a decision tree classifier (DTC) for the classification of script on over the patterns generated from TBV. A spatial features-based script recogniser (SFBSR) is trained and tested with bilingual document images, consisting of various Tamil and English words, to show its effectiveness towards script identification. Classification accuracy in training and testing sets is promising. An evaluation of the system performance with various techniques shows a significant performance improvement in SFBSR. This can be embedded with OCR prior to its recognition stage.
Keywords: document images; script identification; decision tree classifiers; features-based recognition; script recognition; printed documents; bilingual document; OCR systems; optical character recognition; Tamil; English.
International Journal of Computer Applications in Technology, 2010 Vol.38 No.4, pp.283 - 297
Published online: 07 Aug 2010 *Full-text access for editors Access for subscribers Purchase this article Comment on this article