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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">cheb</journal-id><journal-title-group><journal-title xml:lang="ru">Чебышевский сборник</journal-title><trans-title-group xml:lang="en"><trans-title>Chebyshevskii Sbornik</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2226-8383</issn><publisher><publisher-name>Tula State Lev Tolstoy  Pedagogical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22405/2226-8383-2020-21-4-117-128</article-id><article-id custom-type="elpub" pub-id-type="custom">cheb-890</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>Статьи</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Article</subject></subj-group></article-categories><title-group><article-title>Теоремы существования и единственности решения обратных задач проективной геометрии для 3D реконструкции по фотоснимкам</article-title><trans-title-group xml:lang="en"><trans-title>Existence and uniqueness theorems for solutions of inverse problems of projective geometry for 3D reconstruction from photographs</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>Клячин</surname><given-names>Алексей Александрович</given-names></name><name name-style="western" xml:lang="en"><surname>Klyachin</surname><given-names>Alexey Alexandrovich</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор физико-математических наук, доцент</p></bio><bio xml:lang="en"><p>Doctor of Physical and Mathematical Sciences</p></bio><email xlink:type="simple">aleksey.klyachin@volsu.ru</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>Клячин</surname><given-names>Владимир Александрович</given-names></name><name name-style="western" xml:lang="en"><surname>Klyachin</surname><given-names>Vladimir Aleksandrovich</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор физико-математических наук, доцент</p></bio><bio xml:lang="en"><p>Doctor of Physical and Mathematical Sciences, Associate Professor</p><p> </p></bio><email xlink:type="simple">klchnv@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Волгоградский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Associate Professor, Volgograd State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Волгоградский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Volgograd State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>27</day><month>01</month><year>2021</year></pub-date><volume>21</volume><issue>4</issue><fpage>117</fpage><lpage>128</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Клячин А.А., Клячин В.А., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Клячин А.А., Клячин В.А.</copyright-holder><copyright-holder xml:lang="en">Klyachin A.A., Klyachin V.A.</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://www.chebsbornik.ru/jour/article/view/890">https://www.chebsbornik.ru/jour/article/view/890</self-uri><abstract><p>В работе рассматривается задача вычисления параметров плоскости пространственноготреугольника по его центральной проекции. При определенных условиях доказана теоремасуществования решения этой задачи и его единственность. Приведены примеры условий,при которых решения не существует или оно не единственно. Так же предложен алгоритмприближенного поиска всех возможных решений задачи при выполнении определенныхусловий. Рассматриваемая в статье задача возникает при построении трехмерных моделейобъектов по их фотоснимку.</p></abstract><trans-abstract xml:lang="en"><p>The paper considers the problem of calculating the parameters of the plane of a spatialtriangle from its central projection. Under certain conditions, the existence theorem for asolution to this problem and its uniqueness are proved. Examples of conditions under which asolution does not exist or is not unique are given. An algorithm for the approximate search ofall possible solutions to the problem under certain conditions is also proposed. The problemconsidered in the article arises when constructing three-dimensional models of objects from theirphotograph.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>центральная проекция</kwd><kwd>3D реконструкция</kwd><kwd>геометрия треугольника</kwd></kwd-group><kwd-group xml:lang="en"><kwd>central projection</kwd><kwd>3D reconstruction</kwd><kwd>triangle geometry.</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
