Robust Optical Recognition of Cursive Pashto Script Using Scale, Rotation and Location Invariant Approach
Identifieur interne : 000035 ( Main/Exploration ); précédent : 000034; suivant : 000036Robust Optical Recognition of Cursive Pashto Script Using Scale, Rotation and Location Invariant Approach
Auteurs : Riaz Ahmad [Allemagne, Pakistan] ; Saeeda Naz [Pakistan] ; Muhammad Zeshan Afzal [Allemagne] ; Sayed Hassan Amin [Pakistan] ; Thomas Breuel [Allemagne]Source :
- PLoS ONE [ 1932-6203 ] ; 2015.
Abstract
The presence of a large number of unique shapes called ligatures in cursive languages, along with variations due to scaling, orientation and location provides one of the most challenging pattern recognition problems. Recognition of the large number of ligatures is often a complicated task in oriental languages such as Pashto, Urdu, Persian and Arabic. Research on cursive script recognition often ignores the fact that scaling, orientation, location and font variations are common in printed cursive text. Therefore, these variations are not included in image databases and in experimental evaluations. This research uncovers challenges faced by Arabic cursive script recognition in a holistic framework by considering Pashto as a test case, because Pashto language has larger alphabet set than Arabic, Persian and Urdu. A database containing 8000 images of 1000 unique ligatures having scaling, orientation and location variations is introduced. In this article, a feature space based on scale invariant feature transform (SIFT) along with a segmentation framework has been proposed for overcoming the above mentioned challenges. The experimental results show a significantly improved performance of proposed scheme over traditional feature extraction techniques such as principal component analysis (PCA).
Url:
DOI: 10.1371/journal.pone.0133648
PubMed: 26368566
PubMed Central: 4569441
Affiliations:
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Le document en format XML
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Recognition of the large number of ligatures is often a complicated task in oriental languages such as Pashto, Urdu, Persian and Arabic. Research on cursive script recognition often ignores the fact that scaling, orientation, location and font variations are common in printed cursive text. Therefore, these variations are not included in image databases and in experimental evaluations. This research uncovers challenges faced by Arabic cursive script recognition in a holistic framework by considering Pashto as a test case, because Pashto language has larger alphabet set than Arabic, Persian and Urdu. A database containing 8000 images of 1000 unique ligatures having scaling, orientation and location variations is introduced. In this article, a feature space based on scale invariant feature transform (SIFT) along with a segmentation framework has been proposed for overcoming the above mentioned challenges. The experimental results show a significantly improved performance of proposed scheme over traditional feature extraction techniques such as principal component analysis (PCA).</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Naz, S" uniqKey="Naz S">S Naz</name></author><author><name sortKey="Hayat, K" uniqKey="Hayat K">K Hayat</name></author><author><name sortKey="Razzak, Mi" uniqKey="Razzak M">MI Razzak</name></author><author><name sortKey="Anwar, Mw" uniqKey="Anwar M">MW Anwar</name></author><author><name sortKey="Madani, Sa" uniqKey="Madani S">SA Madani</name></author><author><name sortKey="Khan, Su" uniqKey="Khan S">SU Khan</name></author></analytic></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct><analytic><author><name sortKey="Naz, S" uniqKey="Naz S">S Naz</name></author><author><name sortKey="Umar, Ai" uniqKey="Umar A">AI Umar</name></author><author><name sortKey="Shirazi, Sh" uniqKey="Shirazi S">SH Shirazi</name></author><author><name sortKey="Ahmed, Sb" uniqKey="Ahmed S">SB Ahmed</name></author><author><name sortKey="Razzak, Mi" uniqKey="Razzak M">MI Razzak</name></author><author><name sortKey="Siddiqi, I" uniqKey="Siddiqi I">I Siddiqi</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Lorigo, Lm" uniqKey="Lorigo L">LM Lorigo</name></author><author><name sortKey="Govindaraju, V" uniqKey="Govindaraju V">V Govindaraju</name></author></analytic></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct><analytic><author><name sortKey="M Rgner, V" uniqKey="M Rgner V">V Märgner</name></author><author><name sortKey="El Abed, H" uniqKey="El Abed H">H El Abed</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Pal, U" uniqKey="Pal U">U Pal</name></author><author><name sortKey="Sarkar, A" uniqKey="Sarkar A">A 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He</name></author><author><name sortKey="Duan, L" uniqKey="Duan L">L Duan</name></author><author><name sortKey="Yang, J" uniqKey="Yang J">J Yang</name></author><author><name sortKey="Gao, J" uniqKey="Gao J">J Gao</name></author><author><name sortKey="Yu, J" uniqKey="Yu J">J Yu</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Luo, Y" uniqKey="Luo Y">Y Luo</name></author><author><name sortKey="Guan, T" uniqKey="Guan T">T Guan</name></author><author><name sortKey="Wei, B" uniqKey="Wei B">B Wei</name></author><author><name sortKey="Pan, H" uniqKey="Pan H">H Pan</name></author><author><name sortKey="Yu, J" uniqKey="Yu J">J Yu</name></author></analytic></biblStruct><biblStruct></biblStruct><biblStruct><analytic><author><name sortKey="Guan, T" uniqKey="Guan T">T Guan</name></author><author><name sortKey="He, Y" uniqKey="He Y">Y He</name></author><author><name sortKey="Gao, J" uniqKey="Gao J">J Gao</name></author><author><name sortKey="Yang, J" uniqKey="Yang J">J Yang</name></author><author><name sortKey="Yu, J" uniqKey="Yu J">J Yu</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Wei, B" uniqKey="Wei B">B Wei</name></author><author><name sortKey="Guan, T" uniqKey="Guan T">T Guan</name></author><author><name sortKey="Yu, J" uniqKey="Yu J">J Yu</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Ji, R" uniqKey="Ji R">R Ji</name></author><author><name sortKey="Yao, H" uniqKey="Yao H">H Yao</name></author><author><name sortKey="Liu, W" uniqKey="Liu W">W Liu</name></author><author><name sortKey="Sun, X" uniqKey="Sun X">X Sun</name></author><author><name sortKey="Tian, Q" uniqKey="Tian Q">Q Tian</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Ji, R" uniqKey="Ji R">R Ji</name></author><author><name sortKey="Duan, Ly" uniqKey="Duan L">LY Duan</name></author><author><name sortKey="Chen, J" uniqKey="Chen J">J Chen</name></author><author><name sortKey="Xie, L" uniqKey="Xie L">L Xie</name></author><author><name sortKey="Yao, H" uniqKey="Yao H">H Yao</name></author><author><name sortKey="Gao, W" uniqKey="Gao W">W Gao</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Graves, A" uniqKey="Graves A">A Graves</name></author><author><name sortKey="Liwicki, M" uniqKey="Liwicki M">M Liwicki</name></author><author><name sortKey="Fernandez, S" uniqKey="Fernandez S">S Fernández</name></author><author><name sortKey="Bertolami, R" uniqKey="Bertolami R">R Bertolami</name></author><author><name sortKey="Bunke, H" uniqKey="Bunke H">H Bunke</name></author><author><name sortKey="Schmidhuber, J" uniqKey="Schmidhuber J">J Schmidhuber</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Graves, A" uniqKey="Graves A">A Graves</name></author><author><name sortKey="Schmidhuber, J" uniqKey="Schmidhuber J">J 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Afzal</name><name sortKey="Breuel, Thomas" sort="Breuel, Thomas" uniqKey="Breuel T" first="Thomas" last="Breuel">Thomas Breuel</name></country><country name="Pakistan"><noRegion><name sortKey="Ahmad, Riaz" sort="Ahmad, Riaz" uniqKey="Ahmad R" first="Riaz" last="Ahmad">Riaz Ahmad</name></noRegion><name sortKey="Amin, Sayed Hassan" sort="Amin, Sayed Hassan" uniqKey="Amin S" first="Sayed Hassan" last="Amin">Sayed Hassan Amin</name><name sortKey="Naz, Saeeda" sort="Naz, Saeeda" uniqKey="Naz S" first="Saeeda" last="Naz">Saeeda Naz</name><name sortKey="Naz, Saeeda" sort="Naz, Saeeda" uniqKey="Naz S" first="Saeeda" last="Naz">Saeeda Naz</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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