写真測量とリモートセンシング
Online ISSN : 1883-9061
Print ISSN : 0285-5844
53 巻 , 1 号
選択された号の論文の13件中1~13を表示しています
巻頭言
カメラアイ
小特集「平成25年台風26号による伊豆大島の災害」
原著論文
  • 吉田 武史, 川面 怜哉, 塩澤 秀門, 深尾 隆則, 嶋田 忠男
    2014 年 53 巻 1 号 p. 21-33
    発行日: 2014年
    公開日: 2015/03/01
    ジャーナル フリー
    This paper proposes the method which creates less hole 3D model for the information of the disaster area. This method fills the holes of a point cloud model reconstructed with the feature based reconstruction method. To fill the holes, our method uses local and small dense 3D models reconstructed with the template matching (the area based method). And our method uses the superpixel to detect the holes of the point cloud model regardless of whether their contours are closed or not. Our method also uses the homography matrix to fit the view of the images which are captured from the different positions because template matching is not robust for the change of the view between images. This method makes easy to search the corresponding points because this method limits the search range for the corresponding points. And we confirmed an effect of the proposed method through an experiment.
研究速報
  • 坂田 健太, 力丸 厚, 阿部 翔太郎
    2014 年 53 巻 1 号 p. 34-38
    発行日: 2014年
    公開日: 2015/03/01
    ジャーナル フリー
    This study proposes the methodology of distinguishing the snow coverage area on mountains using terrestrial photography images. The pixel value of snow on the mountains in the image changes due to the effect of the slope condition. In the mountain slope condition, pixel value is lower by the effect of shadow. This paper, how to distinguish snow coverage for every slope conditions is considered, and it examined the distinction methodology of not being subject to the effect of shadow conditions. Snow coverage area distinguish accuracy in the terrestrial photography image is improved by the proposing methodology as compared to conventional methodology.
  • 髙橋 一義, 入江 博樹, 山田 貴浩
    2014 年 53 巻 1 号 p. 39-43
    発行日: 2014年
    公開日: 2015/03/01
    ジャーナル フリー
    The single point positioning by single frequency receivers provides positioning results in real time. Its accuracy is about 10m. However, in non-real time usage, such as a fixed point observation, there is a possibility to improve the positioning accuracy of a single frequency receiver by using post interferometric processing. Two positioning experiments, the fixed point positioning experiment and the recorded trajectory comparison experiment of an object moving at a low speed between dual and single frequency GPS receivers, were carried out to examine the positioning accuracy of a single frequency observation and its post interferometric processing. The results of these experiments showed the positioning accuracy and repeatability were 0.09 to 0.12m and 0.02 to 0.07m respectively, in the measurements of the fixed point. And the differences of the recorded trajectories between the dual and the single frequency receivers were 0.65 and 1.18m and the standard deviations were 0.47 and 0.68m respectively, on the horizontal plane. These results suggest that the single frequency observation and its post interferometric processing using permanent GPS station data, has a sub meter positioning accuracy in the fixed point positioning and a repeatability on the horizontal plane of less than 1m on the recorded trajectory of an object moving at a low speed.
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