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    <journal-meta>
      <journal-id journal-id-type="issn">2411-3336</journal-id>
      <journal-id journal-id-type="eissn">2541-9404</journal-id>
      <journal-title-group>
        <journal-title xml:lang="ru">Записки Горного института</journal-title>
        <journal-title xml:lang="en">Journal of Mining Institute</journal-title>
      </journal-title-group>
      <publisher>
        <publisher-name xml:lang="ru">Санкт-Петербургский горный университет императрицы Екатерины ΙΙ</publisher-name>
        <publisher-name xml:lang="en">Empress Catherine II Saint Petersburg Mining University</publisher-name>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id pub-id-type="doi">10.31897/PMI.2021.1.9</article-id>
      <article-id custom-type="pmi" pub-id-type="custom">pmi-13568</article-id>
      <article-id pub-id-type="uri">https://pmi.spmi.ru/pmi/article/view/13568</article-id>
      <article-categories>
        <subj-group subj-group-type="section-heading" xml:lang="ru">
          <subject>Металлургия и обогащение</subject>
        </subj-group>
        <subj-group subj-group-type="section-heading" xml:lang="en">
          <subject>Metallurgy and concentration</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title xml:lang="en">Automated digitization of radial charts</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Автоматизированная оцифровка круговых диаграмм</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author" corresp="yes">
          <name name-style="eastern">
            <surname>Vasilyeva</surname>
            <given-names>Nataliya V.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Васильева</surname>
              <given-names>Н. В.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Vasilyeva</surname>
              <given-names>Nataliya V.</given-names>
            </name>
          </name-alternatives>
          <email>vasileva_nv@pers.spmi.ru</email>
          <contrib-id contrib-id-type="orcid">0000-0001-7408-7290</contrib-id>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <aff-alternatives id="aff1">
          <aff>
            <institution xml:lang="ru">Санкт-Петербургский горный университет (Санкт-Петербург, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Saint-Petersburg Mining University (Saint-Petersburg, Russia)</institution>
          </aff>
        </aff-alternatives>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Boikov</surname>
            <given-names>Aleksei V.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Бойков</surname>
              <given-names>А. В.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Boikov</surname>
              <given-names>Aleksei V.</given-names>
            </name>
          </name-alternatives>
          <email>Boykov_AV@pers.spmi.ru</email>
          <contrib-id contrib-id-type="orcid">0000-0002-6583-2436</contrib-id>
          <xref ref-type="aff" rid="aff2"/>
        </contrib>
        <aff-alternatives id="aff2">
          <aff>
            <institution xml:lang="ru">Санкт-Петербургский горный университет (Санкт-Петербург, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Saint-Petersburg Mining University (Санкт-Петербург, Russia)</institution>
          </aff>
        </aff-alternatives>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Erokhina</surname>
            <given-names>Olga O.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Ерохина</surname>
              <given-names>О. О.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Erokhina</surname>
              <given-names>Olga O.</given-names>
            </name>
          </name-alternatives>
          <email>s205080@stud.spmi.ru</email>
          <contrib-id contrib-id-type="orcid">0000-0002-9570-2309</contrib-id>
          <xref ref-type="aff" rid="aff3"/>
        </contrib>
        <aff-alternatives id="aff3">
          <aff>
            <institution xml:lang="ru">Санкт-Петербургский горный университет (Санкт-Петербург, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Saint-Petersburg Mining University (Saint-Petersburg, Russia)</institution>
          </aff>
        </aff-alternatives>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Trifonov</surname>
            <given-names>Andrei Yu.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Трифонов</surname>
              <given-names>А. Ю.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Trifonov</surname>
              <given-names>Andrei Yu.</given-names>
            </name>
          </name-alternatives>
          <email>atrifonov@tpu.ru</email>
          <contrib-id contrib-id-type="orcid">0000-0001-6959-4183</contrib-id>
          <xref ref-type="aff" rid="aff4"/>
        </contrib>
        <aff-alternatives id="aff4">
          <aff>
            <institution xml:lang="ru">Томский политехнический университет (Томск, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Tomsk polytechnic university (Tomsk, Russia)</institution>
          </aff>
        </aff-alternatives>
      </contrib-group>
      <pub-date pub-type="epub" iso-8601-date="2021-04-26">
        <day>26</day>
        <month>04</month>
        <year>2021</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>2021</year>
      </pub-date>
      <volume>247</volume>
      <fpage>82</fpage>
      <lpage>87</lpage>
      <history>
        <date date-type="received" iso-8601-date="2020-06-23">
          <day>23</day>
          <month>06</month>
          <year>2020</year>
        </date>
        <date date-type="accepted" iso-8601-date="2021-03-02">
          <day>02</day>
          <month>03</month>
          <year>2021</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="2021-04-26">
          <day>26</day>
          <month>04</month>
          <year>2021</year>
        </date>
      </history>
      <permissions>
        <copyright-statement xml:lang="ru">© 2021 Н. В. Васильева, А. В. Бойков, О. О. Ерохина, А. Ю. Трифонов</copyright-statement>
        <copyright-statement xml:lang="en">© 2021 Nataliya V. Vasilyeva, Aleksei V. Boikov, Olga O. Erokhina, Andrei Yu. Trifonov</copyright-statement>
        <copyright-year>2021</copyright-year>
        <copyright-holder xml:lang="ru">Н. В. Васильева, А. В. Бойков, О. О. Ерохина, А. Ю. Трифонов</copyright-holder>
        <copyright-holder xml:lang="en">Nataliya V. Vasilyeva, Aleksei V. Boikov, Olga O. Erokhina, Andrei Yu. Trifonov</copyright-holder>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0" xml:lang="ru">
          <license-p>Эта статья доступна по лицензии Creative Commons Attribution 4.0 International (CC BY 4.0)</license-p>
        </license>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0" xml:lang="en">
          <license-p>This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0)</license-p>
        </license>
      </permissions>
      <self-uri xlink:type="simple" xlink:href="https://pmi.spmi.ru/pmi/article/view/13568">https://pmi.spmi.ru/pmi/article/view/13568</self-uri>
      <abstract xml:lang="ru">
        <p>Круговые диаграммы использовались в промышленности для возможности ретроспективной оценки технологических параметров. Сегодня актуальна оцифровка полученных данных для упрощения процесса автоматизации технологических процессов. Оцифровка круговых диаграмм стандартными методами производится с привлечением человеческого труда при значительных временных затратах. В статье предложен автоматизированный метод оцифровки круговых диаграмм с помощью программного обеспечения, разработанного при использовании среды разработки LabVIEW. Результаты обработки круговых диаграмм выводятся на экран в численном и графическом виде, а также могут быть экспортированы в файл (например, в Блокнот или MS Excel). Представленная методика применима для изображений, полученных на цветном или черно-белом сканере, что обеспечивает минимизацию геометрических искажений, связанных с преобразованием бумажного документа в электронный вид, и обеспечивает качество распознавания четкой линии графика с относительной погрешностью в среднем до 3 %. В случае выцветания чернил или перспективной съемки диаграммы на фотоаппарат значение относительной погрешности может достигать 8 %, вследствие чего потребуется дополнительная ручная корректировка данных.</p>
      </abstract>
      <abstract xml:lang="en">
        <p>Radial charts were commonly used in the industry to allow retrospective assessment of technological parameters. Today it is relevant to digitize the obtained data in order to simplify the automation of technological processes. Digitization of radial charts by means of standard methods is carried out with the help of human labor at significant time costs. The article proposes an automated method for digitizing radial charts using software, developed in the LabVIEW programming environment. The results of processing radial charts are displayed on the screen in numerical and graphical form, and can also be exported to a file (for example, to Notepad or MS Excel). The presented technique can be applied to images obtained on a color or black-and-white scanner, which minimizes geometric distortions, associated with the conversion of a paper document into electronic form, and ensures recognition quality of the clear plot line with an average relative error of up to 3 %. In case of ink fading or perspective photos of the diagram, the value of relative error can reach 8 %, as a result of which additional manual correction of the data will be required.</p>
      </abstract>
      <kwd-group xml:lang="ru">
        <title>Ключевые слова</title>
        <kwd>оцифровка изображений</kwd>
        <kwd>круговые диаграммы</kwd>
        <kwd>LabVIEW</kwd>
        <kwd>распознавание образов</kwd>
        <kwd>обработка цифровых изображений</kwd>
        <kwd>автоматизация</kwd>
      </kwd-group>
      <kwd-group xml:lang="en">
        <title>Keywords</title>
        <kwd>image digitization</kwd>
        <kwd>radial charts</kwd>
        <kwd>LabVIEW</kwd>
        <kwd>image identification</kwd>
        <kwd>digital image processing</kwd>
        <kwd>automation</kwd>
      </kwd-group>
    </article-meta>
  </front>
  <body/>
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