ACCURACY EVALUATION OF STRUCTURE FROM MOTION THERMAL MOSAICING IN THE CENTER OF TOKYO
ACCURACY EVALUATION OF STRUCTURE FROM MOTION THERMAL MOSAICING IN THE CENTER OF TOKYO
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DOI：
10.30536/j.ijreses.2018.v15.a2856
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发表时间：
2019-02
期刊：
影响因子：
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通讯作者：
A. Nurwanda;T. Honjo;N. Tsunematsu;H. Yokoyama
中科院分区：
文献类型：
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作者：
A. Nurwanda;T. Honjo;N. Tsunematsu;H. Yokoyama
在航空高分辨率大面积地面温度测量中，需要采集和合成多幅图像。在传统方法中，需要对大量LST图像进行地理配准的过程来制作一个大图像。采用运动恢复结构（SfM）技术实现了地理配准过程的自动化。我们称之为“SfM热镶嵌”。本研究的目的是评估在制作正交LST图像时SfM热镶嵌的准确性。利用东京市中心的航空热图像，利用SfM热镶嵌技术生成了分辨率为2m的LST图像。然后分析其准确性。结果表明，在整个调查区域内，平均误差距离为4.22m，在小范围内，平均误差距离约为2m。考虑到图像分辨率，误差是最小的，表明良好的性能的SfM热镶嵌。SfM热镶嵌的另一个优点是它可以制作精确的正交LST图像。随着无人机和热成像技术的发展，该方法将为地表温度场的环境研究提供有力的工具。
In the airborne and high-resolution measurement of Land Surface Temperature (LST) over large area, capturing and synthesizing of many images are necessary. In the conventional method, the process of georeferencing a large number of LST images is necessary to make one large image. Structure from Motion (SfM) technique was applied to automized the georeferencing process. We called it “SfM Thermal Mosaicing”. The objective of this study is to evaluate the accuracy of SfM thermal mosaicing in making an orthogonal LST image. By using airborne thermal images in the center of Tokyo, the LST image with the 2m resolution was created by using SfM thermal mosaicing. Its accuracy was then analyzed. The result showed that in the whole examined area, the mean error distance was 4.22m and in the small parts of the examined area, the mean the error distance was about 2m. Considering the image resolution, the error was minimal indicating good performance of the SfM thermal mosaicing. Another advantage of SfM thermal mosaicing is that it can make precise orthogonal LST image. With the progress of UAV and thermal cameras, the proposed method will be a powerful tool for the environmental researches on the LST.