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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">inform</journal-id><journal-title-group><journal-title xml:lang="ru">Информатика</journal-title><trans-title-group xml:lang="en"><trans-title>Informatics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1816-0301</issn><issn pub-type="epub">2617-6963</issn><publisher><publisher-name>UIIP NASB</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">inform-318</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>ОБРАБОТКА СИГНАЛОВ, ИЗОБРАЖЕНИЙ, РЕЧИ И ТЕКСТА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>SIGNAL, IMAGE, SPEECH AND TEXT PROCESSING</subject></subj-group></article-categories><title-group><article-title>АДАПТИВНОЕ СЖАТИЕ ШИРОКОГО ДИНАМИЧЕСКОГО ДИАПАЗОНА ЦИФРОВЫХ РАДАРНЫХ СПУТНИКОВЫХ ИЗОБРАЖЕНИЙ</article-title><trans-title-group xml:lang="en"><trans-title>ADAPTIVE COMPRESSING OF THE HIGH DYNAMIC RANGE OF DIGITAL RADAR SATELLITE 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>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"><p>доктор технических наук, профессор, главный научный сотрудник</p></bio><bio xml:lang="en"><p>D. Sc. (Engineering), Chief Researcher</p></bio><email xlink:type="simple">valerys@newman.bas-net.by</email><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&#13;
наук Беларуси, Минск</institution></aff><aff xml:lang="en"><institution>The United Institute of Informatics Problems of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>26</day><month>03</month><year>2018</year></pub-date><volume>15</volume><issue>1</issue><fpage>81</fpage><lpage>91</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Старовойтов В.В., 2018</copyright-statement><copyright-year>2018</copyright-year><copyright-holder xml:lang="ru">Старовойтов В.В.</copyright-holder><copyright-holder xml:lang="en">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://inf.grid.by/jour/article/view/318">https://inf.grid.by/jour/article/view/318</self-uri><abstract><p>Рассматривается задача преобразования цифрового радарного изображения, имеющего широкий динамический диапазон значений яркости (до 216 величин), для отображения на стандартном мониторе. Монитор имеет 28 оттенков яркости серого или каждого из трех базовых цветов в системе RGB. Линейное переквантование значений яркости исходного изображения порождает практически черное изображение с небольшими светлыми точками, так как большинство исходных значений имеют величину менее 255–512 и уменьшаются в 256 раз. Для решения поставленной задачи предлагается использовать нелинейное преобразование логарифмического типа с вычисляемым по исходным изображениям параметром. На реальных данных, полученных со спутника TerraSAR-X в формате geoTIFF, выполнены сравнительные исследования с другими алгоритмами сжатия широкого динамического диапазона яркостей изображений. Показывается, что предлагаемое решение позволяет создать визуально более качественное изображение по сравнению с известными алгоритмами.</p></abstract><trans-abstract xml:lang="en"><p>Transformation of a digital radar image with a wide dynamic range of luminance values (up to 216 tones) for visualization on a standard monitor is considered. The monitor has 28 gray value range or any of three basic colors in the RGB system. Linear quantization of the luminance values of the original image generates a nearly black image with small light blobs, since most of the original values are less than 255–512 and are reduced by 256 times. To solve the problem, it is proposed to use a nonlinear logarithmic transformation with a parameter calculated from the original images. On real data received from the TerraSAR-X satellite in the geoTIFF format, comparative studies with other compression algorithms for a wide dynamic range of image brightness are performed. It is shown that the proposed solution allows creating a visually better image in comparison with the known algorithms.</p><p> </p></trans-abstract><kwd-group xml:lang="ru"><kwd>большой динамический диапазон</kwd><kwd>отображение полутонов</kwd><kwd>сжатие диапазона</kwd><kwd>цифровое изображение</kwd><kwd>компандирование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>high dynamic range</kwd><kwd>tone mapping</kwd><kwd>range compression</kwd><kwd>digital image</kwd><kwd>companding</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">Schlick, C. Quantization techniques for visualization of high dynamic range pictures / C. Schlick // Photorealistic Rendering Techniques. – Berlin, Heidelberg, 1995. – P. 7–20.</mixed-citation><mixed-citation xml:lang="en">Schlick, C. Quantization techniques for visualization of high dynamic range pictures / C. 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