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    <title>Ergebnis für Versionen - 4072931</title>
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    <item>
      <title>Verwendung von Maske R-CNN zur Erkennung der Wasserlinie bei der Videoanalyse von Kanusprints</title>
      <pubDate>Wed, 01 Jan 2020 06:29:55 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4072931</link>
      <guid>https://sponet.de/sponet/Record/4072931</guid>
      <author>von Braun, M.-S.</author>
      <author>Frenzel, P.</author>
      <author>Käding, C.</author>
      <author>Fuchs, M.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Kanurennsport</dc:subject>
      <dc:subject>Video</dc:subject>
      <dc:subject>Hydrodynamik</dc:subject>
      <dc:subject>Messverfahren</dc:subject>
      <dc:subject>Technologie</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>von Braun, M.-S.</dc:creator>
      <dc:creator>Frenzel, P.</dc:creator>
      <dc:creator>Käding, C.</dc:creator>
      <dc:creator>Fuchs, M.</dc:creator>
      <content:encoded><![CDATA[Determining a waterline in images recorded in canoe sprint training is an important component for the kinematic parameter analysis to assess an athlete's performance. Here, we propose an approach for the automated waterline detection. First, we utilized a pre-trained Mask R-CNN by means of transfer learning for canoe segmentation. Second, we developed a multi-stage approach to estimate a waterline from the outline of the segments. It consists of two linear regression stages and the systematic selection of canoe parts. We then introduced a parameterization of the waterline as a basis for further evaluations. Next, we conducted a study among several experts to estimate the ground truth waterlines. This not only included an average waterline drawn from the individual experts annotations but, more importantly, a measure for the uncertainty between individual results. Finally, we assessed our method with respect to the question whether the predicted waterlines are in accordance with the experts annotations. Our method demonstrated a high performance and provides opportunities for new applications in the field of automated video analysis in canoe sprint.]]></content:encoded>
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    <item>
      <title>Verwendung von Mask R-CNN zur Wasserlinienerkennung in der der Kanu-Sprint-Videoanalyse</title>
      <pubDate>Wed, 01 Jan 2020 06:29:55 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4060867</link>
      <guid>https://sponet.de/sponet/Record/4060867</guid>
      <author>von Braun, M.-S.</author>
      <author>Frenzel, P.</author>
      <author>Käding, C.</author>
      <author>Fuchs, M.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Kanusport</dc:subject>
      <dc:subject>Kanurennsport</dc:subject>
      <dc:subject>Sprint</dc:subject>
      <dc:subject>Biomechanik</dc:subject>
      <dc:subject>Analyse</dc:subject>
      <dc:subject>Video</dc:subject>
      <dc:subject>Messverfahren</dc:subject>
      <dc:subject>Mess- und Informationssystem</dc:subject>
      <dc:subject>Leistungsdiagnostik</dc:subject>
      <dc:subject>Sportgerät</dc:subject>
      <dc:tag>maschinelles Lernen</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>von Braun, M.-S.</dc:creator>
      <dc:creator>Frenzel, P.</dc:creator>
      <dc:creator>Käding, C.</dc:creator>
      <dc:creator>Fuchs, M.</dc:creator>
      <content:encoded><![CDATA[Determining a waterline in images recorded in canoesprint training is an important component for the kinematic parameter analysis to assess an athlete`s performance. Here, we propose an approach for the automated waterline detection. First, we utilized a pre-trained MaskR-CNN by means of transfer learning for canoe segmentation. Second, we developed a multi-stage approach to estimate a waterline from the outline of the segments. It consists of two linear regression stages and the systematic selection of canoe parts. We then introduced a parameterization of the waterline as a basis for further evaluations. Next, we conducted a study among several experts to estimate the ground truth waterlines. This not only included an average waterline drawn from the individual experts annotations but, more importantly, a measure for the uncertainty between individual results. Finally, we assessed ourmethod with respect to the question whether the predicted waterlines are in accordance with the experts annotations.Our method demonstrated a high performance and provides opportunities for new applications in the field of automated video analysis in canoe sprint.]]></content:encoded>
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