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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">sapi</journal-id><journal-title-group><journal-title xml:lang="ru">Системный анализ и прикладная информатика</journal-title><trans-title-group xml:lang="en"><trans-title>«System analysis and applied information science»</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2309-4923</issn><issn pub-type="epub">2414-0481</issn><publisher><publisher-name>Belarusian National Technical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21122/2309-4923-2022-2-4-9</article-id><article-id custom-type="elpub" pub-id-type="custom">sapi-554</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Системный анализ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>System analysis</subject></subj-group></article-categories><title-group><article-title>Предварительная обработка изображений рукописных подписей для последующего распознавания</article-title><trans-title-group xml:lang="en"><trans-title>Pre-processing of handwritten signature images for following recognition</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ахунджанов</surname><given-names>У. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Akhundjanov</surname><given-names>U. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Старовойтов</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Starovoitov</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Объединенный институт проблем информатики Национальной академии наук Беларуси</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>United Institute of Informatics Problems, National Academy of Sciences of Belarus</institution><country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>16</day><month>06</month><year>2022</year></pub-date><volume>0</volume><issue>2</issue><fpage>4</fpage><lpage>9</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ахунджанов У.Ю., Старовойтов В.В., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Ахунджанов У.Ю., Старовойтов В.В.</copyright-holder><copyright-holder xml:lang="en">Akhundjanov U.Y., Starovoitov V.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://sapi.bntu.by/jour/article/view/554">https://sapi.bntu.by/jour/article/view/554</self-uri><abstract><p>В процессе распознавания рукописной подписи предварительная обработка подписи является важным этапом перед выявлением информативных признаков. Подписи одного человека всегда имеют некоторые отличия, кроме того они могут быть разного цвета, разного размера и ориентации. После оцифровки подписей их изображения могут содержать некоторый шум. Цель предварительной обработки изображения подписи – получение максимально инвариантного представления цифрового изображения подписи человека, которое позволит его идентифицировать, либо установить, что подпись подделана.</p><p>В данной работе описана последовательность преобразований, необходимых для выполнения предварительной обработки изображения подписи и формирования ее представления единой ориентации и размера. Предполагается что на изображении отсутствуют графические элементы, не относящиеся к подписи и фон относительно однородный. Рассматриваемые преобразования последовательно выполняют бинаризацию изображения подписи, его фильтрацию, поворот, вырезание описывающего прямоугольника и масштабирование до определенного размера. </p><p>Описанная процедура предварительной обработке была применена к ряду доступных баз цифровых изображений подписей, таких как CEDAR, BHSig260-Bengali, BHSig260-Hindi. Эксперименты подтверждают, что описанный подход к предварительной обработке изображений подписи позволяет повысить точность результатов  распознавания подписи.</p></abstract><trans-abstract xml:lang="en"><p>In the process of handwritten signature recognition, preprocessing is an important step before calculation its informative features. Signatures of any person always have some differences, in addition, they can be of different colors, sizes and orientations. After signature digitization, their images may contain some noise. The purpose of signature image preprocessing is to obtain the most invariant representation of the digital image of a person's signature, which will allow us to identify him or define that the signature is forged.</p><p>This paper describes a sequence of transformations necessary to perform preprocessing of the signature image and form its representation of a single orientation and size. It is assumed that there are no graphic elements in the image that are not related to the signature and the background is relatively uniform. The transformations under consideration sequentially perform binarization of the signature image, its filtering, rotation, cropping of the circumscribed rectangle and scaling to a fixed size.</p><p>The described preprocessing procedures were applied to a number of available digital signature image databases, such as CEDAR, BHSig260-Bengali, BHSig260-Hindi. Experiments on signature recognition confirm that the presented approach to the signature image preprocessing leads to increasing of the recognition accuracy.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>подпись</kwd><kwd>идентификация</kwd><kwd>обработка изображений</kwd><kwd>бинарное изображение</kwd><kwd>фильтрация</kwd><kwd>распознавание подписи</kwd></kwd-group><kwd-group xml:lang="en"><kwd>signature</kwd><kwd>identification</kwd><kwd>image processing</kwd><kwd>binary image</kwd><kwd>filtering</kwd><kwd>signature recognition</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Hafemann, L.G. Offline handwritten signature verification — Literature review / L.G. Hafemann, R. Sabourin, L.S. Oliveira // Seventh International Conference on Image Processing Theory, Tools and Applications (IPTA) – 2017. 8 p. 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