Feature extraction from printed Persian sub-words using Haar wavelet transform

Samira Nasrollahi Dizajyekan; Afshin Ebrahimi

doi:10.1117/12.896300

8 July 2011 Feature extraction from printed Persian sub-words using Haar wavelet transform

Samira Nasrollahi Dizajyekan, Afshin Ebrahimi

Proceedings Volume 8009, Third International Conference on Digital Image Processing (ICDIP 2011); 80091B (2011) https://doi.org/10.1117/12.896300
Event: 3rd International Conference on Digital Image Processing, 2011, Chengdu, China

Abstract

This article presents a novel set of shape descriptors which are especially well-suited for the recognition of printed Persian sub-words based on their holistic shapes. The descriptor set is derived from the wavelet transform of a sub-word's image. The proposed algorithm is used to extract features from 87804 sub-words of 4 fonts and 3 sizes. To evaluate the feature extraction results, this algorithm was used to obtain recognition rate for a set of sub-words in a printed Persian text document. Features of an unknown sub-word are extracted and compared with all sub-words features in the dictionary and the desired sub-word is identified. In this stage to increase the recognition rate, dot features of the unknown sub-word are used as the second feature and compared with dot codes of 10 last sub-words in before stage and the sub-word with maximum similarity is extracted as correct recognized sub-word.

Citation Download Citation

Samira Nasrollahi Dizajyekan and Afshin Ebrahimi "Feature extraction from printed Persian sub-words using Haar wavelet transform", Proc. SPIE 8009, Third International Conference on Digital Image Processing (ICDIP 2011), 80091B (8 July 2011); https://doi.org/10.1117/12.896300

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