International Journal on Advanced Science, Engineering and Information Technology, Vol. 9 (2019) No. 2, pages: 700-710, DOI:10.18517/ijaseit.9.2.6809

High Quality Wavelets Features Extraction for Handwritten Arabic Numerals Recognition

M. Suhail Akhtar, Hammad A. Qureshi, Hani Al-Quhayz

Abstract

Arabic handwritten digit recognition is the science of recognition and classification of handwritten Arabic digits. It has been a subject of research for many years with rich literature available on the subject.  Handwritten digits written by different people are not of the same size, thickness, style, position or orientation, hence, many different challenges have to be overcome in order to resolve the problem of handwritten digit recognition.  The variation in the digits is due to the writing styles of different people which can differ greatly.  Automatic handwritten digit recognition has wide application such as automatic processing of bank cheques, postal addresses and tax forms etc.  A typical handwritten digit recognition application consists of three main stages namely features extraction, features selection and classification. One of the most important problem is feature extraction. In this paper, a novel feature extraction approach for off-line handwritten digit recognition is presented. Wavelets-based analysis of image data is carried out for feature extraction and then classification is performed using various classifiers. To further reduce the size of training data-set, high entropy subbands are selected. In order to increase the recognition rate, individual subbands providing high classification accuracies are selected from the over-complete tree. The features extracted are also normalized in order to standardize the range of independent variables before providing them to the classifier. Classification is carried out using k-NN and SVMs. The results show that the quality of extracted features is high as almost equivalently high classification accuracies are acquired for both classifiers i.e. k-NNs and SVMs.

Keywords:

Wavelets analysis, Wavelet packets analysis, Handwritten digits recognition, k-NNs, SVMs

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