写真測量とリモートセンシング
Online ISSN : 1883-9061
Print ISSN : 0285-5844
ISSN-L : 0285-5844
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選択された号の論文の12件中1~12を表示しています
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原著論文
  • 鈴木 遼雅, 岡原 浩平, 山﨑 賢人, 都丸 義広, 平 謙二
    2021 年 60 巻 3 号 p. 121-128
    発行日: 2021年
    公開日: 2022/07/01
    ジャーナル フリー

    Accurate measurement of the shape of road surfaces is essential in pavement work. Recently, mobile laser scanning (MLS) systems have been used to facilitate pavement measurement. MLS Systems require an automatic tracking total station (ATTS) and an inertial measurement unit (IMU) for localization. However, a sophisticated IMU is needed to achieve sufficient accuracy with MLS systems, and such an IMU increases the cost associated with the measurement process. In this report, we propose a novel road surface measurement method using mobile cameras and an ATTS. Our proposed method performs accurate estimation of camera poses using few ground control points, which enables low-cost photogrammetry-based measurements. As a result of our experiment, we confirmed that the proposed method can achieve sufficient accuracy for pavement management.

  • 梅原 喜政, 山本 雄平, 姜 文渊, 寺口 敏生, 田中 成典, 佐藤 衛
    2021 年 60 巻 3 号 p. 129-143
    発行日: 2021年
    公開日: 2022/07/01
    ジャーナル フリー

    In Japan, towards the Tokyo Olympics and Paralympics, the Japan Sports Agency has been founded, and policies related to training athletes and improving competitiveness are being promoted. To achieve these policies, many researches use AI technology to analyze sports data gathered by video cameras and IoT devices. To make effective use of those data, it is necessary to manage them with a unified time stamp. However, it is difficult to unify the time stamp because these devices are not linked to each other. To solve this problem, the time synchronization is often adopted manually, but it costs a lot of manpower. Therefore, in this research, we firstly organize the problems of time synchronization between video cameras and between video cameras and GNSS device by investigating existing researches. And then, we propose an efficient and highly accurate time synchronization technologies that can solve these problems.

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