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An Optimal Image-Selection Algorithm for Large-Scale Stereoscopic Mapping of UAV Images

Cited 3 time in wos
Cited 4 time in scopus
An Optimal Image-Selection Algorithm for Large-Scale Stereoscopic Mapping of UAV Images
Other Titles
대량의 무인기 영상 맵핑을 위한 최적 영상 선택 알고리즘
Lim, Pyung-chae
Rhee, Sooahm
Seo, Junghoon
Kim, Jae-In
Chi, Junhwa
Lee, Suk-bae
Kim, Taejung
Environmental Sciences & EcologyGeologyRemote SensingImaging Science & Photographic Technology
UAV imagesimage overlapmonoscopic mappingoptimal image selectionstereoscopic plotting
Issue Date
Lim, Pyung-chae, et al. 2021. "An Optimal Image-Selection Algorithm for Large-Scale Stereoscopic Mapping of UAV Images". REMOTE SENSING, 13(11): 1-15.
Recently, the mapping industry has been focusing on the possibility of large-scale map- ping from unmanned aerial vehicles (UAVs) owing to advantages such as easy operation and cost reduction. In order to produce large-scale maps from UAV images, it is important to obtain precise orientation parameters as well as analyzing the sharpness of they themselves measured through image analysis. For this, various techniques have been developed and are included in most of the commercial UAV image processing software. For mapping, it is equally important to select images that can cover a region of interest (ROI) with the fewest possible images. Otherwise, to map the ROI, one may have to handle too many images, and commercial software does not provide information needed to select images, nor does it explicitly explain how to select images for mapping. For these reasons, stereo mapping of UAV images in particular is time consuming and costly. In order to solve these problems, this study proposes a method to select images intelligently. We can select a minimum number of image pairs to cover the ROI with the fewest possible images. We can also select optimal image pairs to cover the ROI with the most accurate stereo pairs. We group images by strips and generate the initial image pairs. We then apply an intelligent scheme to iteratively select optimal image pairs from the start to the end of an image strip. According to the results of the experiment, the number of images selected is greatly reduced by applying the proposed optimal image?composition algorithm. The selected image pairs produce a dense 3D point cloud over the ROI without any holes. For stereoscopic plotting, the selected image pairs were map the ROI successfully on a digital photogrammetric workstation (DPW) and a digital map covering the ROI is generated. The proposed method should contribute to time and cost reductions in UAV mapping.
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2021 Polar Industrial Program (PE21910)
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