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These methods divide a set of writing samples into small units (fragments or graphemes) and cluster these patterns to produce a codebook. Writer of a handwritten sample is then characterized by the probability (distribution) of producing the codebook patterns. In most cases, a small subset of the database under study is employed to produce the codebook while the rest of the database is used in evaluations. This work aims to validate the hypothesis that the codebook simply serves as a representation space to compare different writings and, in most cases, the patterns in the codebook do not significantly influence the identification and verification performance. The hypothesis is validated by generating a number of codebooks using Greek, Arabic and Chinese handwritten samples. Moreover, codebooks using fragments of handwritten music scores, printed text and synthetic data are also investigated. Evaluations on three well\u2010known handwriting databases (CVL, BFL and IAM) validate the idea that, in general, the codebook patterns do not have a significant impact on characterizing writer from handwriting.<\/jats:p>","DOI":"10.1111\/exsy.12662","type":"journal-article","created":{"date-parts":[[2021,1,15]],"date-time":"2021-01-15T18:44:49Z","timestamp":1610736289000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Influence of codebook patterns on writer recognition: An experimental study"],"prefix":"10.1111","volume":"38","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8436-827X","authenticated-orcid":false,"given":"Chawki","family":"Djeddi","sequence":"first","affiliation":[{"name":"Department of Mathematics and Computer Science Larbi Tebessi University  Tebessa Algeria"},{"name":"LITIS Laboratory University of Rouen  Rouen France"}]},{"given":"Imran","family":"Siddiqi","sequence":"additional","affiliation":[{"name":"Vision &amp; Learning Lab Bahria University  Islamabad Pakistan"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7986-2492","authenticated-orcid":false,"given":"Abdeljalil","family":"Gattal","sequence":"additional","affiliation":[{"name":"Department of Mathematics and Computer Science Larbi Tebessi University  Tebessa Algeria"}]},{"given":"Somaya","family":"Al\u2010Maadeed","sequence":"additional","affiliation":[{"name":"Department of Computer Science and Engineering Qatar University  Doha Qatar"}]},{"given":"Abdellatif","family":"Ennaji","sequence":"additional","affiliation":[{"name":"LITIS Laboratory University of Rouen  Rouen France"}]}],"member":"311","published-online":{"date-parts":[[2021,1,14]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.forsciint.2019.05.014"},{"key":"e_1_2_8_3_1","unstructured":"Bensefia A. 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