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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">10.21122/2309-4923-2019-2-4-11</article-id><article-id custom-type="elpub" pub-id-type="custom">sapi-260</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>Исследование локальных оценок контраста цифровых изображений при отсутствии эталона</article-title><trans-title-group xml:lang="en"><trans-title>Study of local assessments of contrast for digital images</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>Голуб</surname><given-names>Ю. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Golub</surname><given-names>Y. I.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><email xlink:type="simple">6423506@gmail.com</email><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>Ф. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Starovoitov</surname><given-names>F. V.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Объединенный институт проблем информатики НАН 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><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Белорусский национальный технический университет</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>Belarusian National Technical University</institution><country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>28</day><month>08</month><year>2019</year></pub-date><volume>0</volume><issue>2</issue><fpage>4</fpage><lpage>11</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Голуб Ю.И., Старовойтов Ф.В., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Голуб Ю.И., Старовойтов Ф.В.</copyright-holder><copyright-holder xml:lang="en">Golub Y.I., Starovoitov F.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/260">https://sapi.bntu.by/jour/article/view/260</self-uri><abstract><p>В статье рассматривается понятие контраста цифрового изображения. Исследованы различные количественные оценки контраста цифровых изображений. Выполнены сравнительные экспериментальные исследования разных оценок контраста на двух стандартных базах изображений. Показано, что оценивание контраста посредством вычисления среднего арифметического или среднеквадратического значений множества локальных оценок не всегда совпадает с визуальной оценкой человека. Результаты экспериментов показали, что параметр формы распределения Вейбулла является более точной оценкой множества локальных измерений контраста, вычисленных функциями BEGH, GORD, LOEN и хорошо коррелирует с визуальными оценками контраста.</p></abstract><trans-abstract xml:lang="en"><p>The article study notion of the digital image contrast. Various quantitative estimates of the contrast of digital images are investigated. Comparative experimental studies of different contrast estimates were performed on two standard image databases. It is shown that the evaluation of contrast by calculating the arithmetic average or MSE values of a set of local estimates does not always coincide with the visual contrast assessment. Experimental results showed that the Weibull distribution shape parameter is a more accurate estimate of the set of local contrast estimates calculated by the BEGH, GORD, LOEN functions and correlates well with the visual contrast estimates.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>контраст изображения</kwd><kwd>коэффициент контраста</kwd><kwd>оценка качества изображения</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">Краткий фотографический словарь. Под общей редакцией А. А. Лапаури и В. И. Шеберстова. – М.: Искусство. – 1956.</mixed-citation><mixed-citation xml:lang="en">Kratkij fotograficheskij slovar’. Pod obshhej redakciej A. A. Lapauri i V. I. 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