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Automated System for Arabic Optical Character Recognition with Lookup Dictionary

Inad Aljarrah, Osama Al-Khaleel, Khaldoon Mhaidat, Mu'ath Alrefai, Abdullah Alzu'bi, and Mohammad Rabab'ah
Department of Computer Engineering, Jordan University of Science and Technology, Irbid, Jordan 22110
Abstract—In this paper an Arabic Optical Character Recognition system is implemented. The system takes a scanned image of an Arabic text as an input and generates an editable text out of it. The system starts by segmenting the document which is presented as an image into lines, then each line is also segmented into separate words, after that each word is further segmented to sub-words. Each word or sub-word is segmented into separate characters, and then a features extraction process is applied on each character to calculate its features vector. The feature vector is then compared with templates of feature vectors for each of the Arabic alphabet with their variations. The minimum distance classifier is used in the classification stage. A recognition rate of 93.5% is attained. To improve the accuracy of the system, a lookup dictionary is employed to correct some of the misclassified characters. This resulted in improving the accuracy to 96.1%. The results achieved are promising regardless that Arabic Optical Character Recognition is considered many times harder to handle than its counterparts in other languages like English due to the continuity between the letters in the same word.

Index Terms—arabic OCR, arabic characters, segmentation, recognition, image processing 

Cite: Inad Aljarrah, Osama Al-Khaleel, Khaldoon Mhaidat, Mu'ath Alrefai, Abdullah Alzu'bi, and Mohammad Rabab'ah, "Automated System for Arabic Optical Character Recognition with Lookup Dictionary," Journal of Emerging Technologies in Web Intelligence, Vol. 4, No. 4, pp. 362-370, November 2012. doi:10.4304/jetwi.4.4.362-370
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