Novel geometric features for off-line writer identification

Somaya Al-Maadeed, Abdelaali Hassaine, Ahmed Bouridane, Muhammad Tahir

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)
3 Downloads (Pure)

Abstract

Writer identification is an important field in forensic document examination. Typically, a writer identification system consists of two main steps: feature extraction and matching and the performance depends significantly on the feature extraction step. In this paper, we propose a set of novel geometrical features that are able to characterize different writers. These features include direction, curvature, and tortuosity. We also propose an improvement of the edge-based directional and chain code-based features. The proposed methods are applicable to Arabic and English handwriting. We have also studied several methods for computing the distance between feature vectors when comparing two writers. Evaluation of the methods is performed using both the IAM handwriting database and the QUWI database for each individual feature reaching Top1 identification rates of 82 and 87 % in those two datasets, respectively. The accuracies achieved by Kernel Discriminant Analysis (KDA) are significantly higher than those observed before feature-level writer identification was implemented. The results demonstrate the effectiveness of the improved versions of both chain-code features and edge-based directional features.
Original languageEnglish
Pages (from-to)699-708
JournalPattern Analysis and Applications
Volume19
Issue number3
Early online date27 Dec 2014
DOIs
Publication statusPublished - Aug 2016

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