Recovering absolute scale for Structure from Motion using the law of free fall
文献类型：期刊论文
| 作者 | Li, Langping1; Lan, Hengxing1,2
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| 刊名 | OPTICS AND LASER TECHNOLOGY
 |
| 出版日期 | 2019-04-15 |
| 卷号 | 112页码:514-523 |
| 关键词 | Structure from Motion Absolute scale Law of free fall Video Rockfall |
| ISSN号 | 0030-3992 |
| DOI | 10.1016/j.optlastec.2018.11.045 |
| 通讯作者 | Lan, Hengxing(lanhx@lreis.ac.cn) |
| 英文摘要 | Reconstructions of objects (or scenes) using Structure from Motion (SfM) based on monocular camera or multiple uncalibrated cameras are only possible up to an unknown scale. Most of existing approaches for recovering absolute scale for SfM rely on additional constraints in absolute scale quantified by either metric data of the object (or scene) or motion data of the camera(s). This paper presented a novel approach for recovering absolute scale for SfM based on motion constraints defined by a relative free fall motion between the camera and the object. The proposed approach is strict because the adopted relative free fall motion is directly reconstructed by SfM and is therefore not complicated by the intrinsic problem that the motion of the camera recorded by external sensors cannot truly represent the motion of the center of perspective of the camera. Experiments of the proposed approach based on a widely used SfM-MVS pipeline had derived scale factors with relative errors smaller than 5%, yet returned camera motions that did not approximate with a reasonable degree of accuracy to what the law of free fall predicted. It is suggested that this deviation is owing to that SfM processes are not constrained by physical laws, and might be moderated by fusing kinematic constraints of free fall motion into bundle adjustment. In addition, uncertainties related to camera properties and experiment designs should also be reduced so that the proposed closed-form analytical solution for recovering absolute scale can work properly in practice. To our knowledge, this paper for the first time shows the potential of recovering absolute scale for geometric SfM reconstruction using a universal physical law. |
| WOS关键词 | ROCKFALL TRAJECTORIES ; RECONSTRUCTION |
| 资助项目 | National Science Foundation of China[41525010] ; National Science Foundation of China[41807291] ; National Science Foundation of China[41790443] ; National Science Foundation of China[41472282] ; National Science Foundation of China[41421001] ; Youth Science Funds of LREIS, CAS |
| WOS研究方向 | Optics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000458941800063 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | National Science Foundation of China ; Youth Science Funds of LREIS, CAS |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/49451]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Lan, Hengxing |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, 11A Datun Rd, Beijing 100101, Peoples R China 2.Changan Univ, Sch Geol Engn & Geomat, Xian 710064, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Langping,Lan, Hengxing. Recovering absolute scale for Structure from Motion using the law of free fall[J]. OPTICS AND LASER TECHNOLOGY,2019,112:514-523. |
| APA | Li, Langping,&Lan, Hengxing.(2019).Recovering absolute scale for Structure from Motion using the law of free fall.OPTICS AND LASER TECHNOLOGY,112,514-523. |
| MLA | Li, Langping,et al."Recovering absolute scale for Structure from Motion using the law of free fall".OPTICS AND LASER TECHNOLOGY 112(2019):514-523. |
入库方式： OAI收割
来源：地理科学与资源研究所
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