Characterizing Radiometric Attributes of Point Cloud Using a Normalized Reflective Factor Derived From Small Footprint LiDAR Waveform
文献类型：期刊论文
| 作者 | Qin, Yuchu1; Yao, Wei1; Tuong Thuy Vu1; Li, Shihua1; Niu, Zheng1; Ban, Yifang1 |
| 刊名 | IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
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| 出版日期 | 2015 |
| 卷号 | 8期号:2页码:775-783 |
| 关键词 | Correction intensity normalized reflective factor (NRF) small footprint light detection and ranging (LiDAR) waveform |
| 通讯作者 | Qin, YC (reprint author), Royal Inst Technol KTH, Geodesy & Geoinformat Div, S-10044 Stockholm, Sweden. |
| 英文摘要 | This paper presents a reflectance-like coefficient, normalized reflective factor (NRF) to characterize the radiometric attributes of point cloud generated from small footprint light detection and ranging (LiDAR) waveform data. The NRF is defined as a normalized ratio between the energy of emitted laser beam and the peak in return waveform in conjunction with the atmospheric attenuation and observation geometry. Based on the Gaussian parameters of the emitted and return waveforms, NRF is calculated with an empirical atmospheric model and user-defined standard observation geometry. To correct the radiometric measurement of point cloud in multipeak waveform, a semi-physical-based method is adopted to enhance the NRF of point cloud generated from multipeak waveform. Experiments are conducted with small footprint LiDAR waveform data acquired by RIEGL LMS-Q560. A curve-fitting-based approach is applied to decompose LiDAR waveform into three-dimensional (3-D) coordinates of point cloud, and the NRF are calculated using the Gaussian parameters of both emitted and return waveforms. The visualization of the radiometric attributes of point cloud data is carried out over the overlapping areas between different flight strips, it suggests that the NRF over overlapping area is much smooth than the normalized intensity. Quantitative comparison with Hyperion data indicates that the NRF has much higher correlation with surface reflectance than the normalized intensity data. Standard deviations of NRF and the normalized intensity of different land cover patches are analyzed to assess the homogeneity of the radiometric data. It is observed that NRF has less variability than the normalized intensity within the same land cover patches. Point cloud of two sample trees is also selected to assess the performance of the "sub-footprint" effect correction. It is observed that the proposed approach reduced the variability of radiometric attributes over tree canopies with increasing NRF values; which means the "sub-footprint" effect is mitigated. In summary, the proposed NRF can serve as a promising indicator to characterize radiometric attribute of LiDAR point cloud. |
| 研究领域[WOS] | Engineering, Electrical & Electronic ; Geography, Physical ; Remote Sensing ; Imaging Science & Photographic Technology |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000352277100025 |
| 源URL | [http://ir.ceode.ac.cn/handle/183411/38484]  |
| 专题 | 遥感与数字地球研究所_SCI/EI期刊论文_期刊论文 |
| 作者单位 | 1.[Qin, Yuchu 2.Ban, Yifang] Royal Inst Technol KTH, Geodesy & Geoinformat Div, S-10044 Stockholm, Sweden 3.[Yao, Wei] Tech Univ Munich, Photogrammetry & Remote Sensing, D-80333 Munich, Germany 4.[Tuong Thuy Vu] Univ Nottingham, Sch Geog, Semenyih 43500, Malaysia 5.[Li, Shihua] Univ Elect Sci & Technol China, Sch Resources & Environm, Chengdu 611731, Peoples R China 6.[Niu, Zheng] Chinese Acad Sci, Inst Remote Sensing Applicat, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qin, Yuchu,Yao, Wei,Tuong Thuy Vu,et al. Characterizing Radiometric Attributes of Point Cloud Using a Normalized Reflective Factor Derived From Small Footprint LiDAR Waveform[J]. IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING,2015,8(2):775-783. |
| APA | Qin, Yuchu,Yao, Wei,Tuong Thuy Vu,Li, Shihua,Niu, Zheng,&Ban, Yifang.(2015).Characterizing Radiometric Attributes of Point Cloud Using a Normalized Reflective Factor Derived From Small Footprint LiDAR Waveform.IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING,8(2),775-783. |
| MLA | Qin, Yuchu,et al."Characterizing Radiometric Attributes of Point Cloud Using a Normalized Reflective Factor Derived From Small Footprint LiDAR Waveform".IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING 8.2(2015):775-783. |
入库方式： OAI收割
来源：遥感与数字地球研究所
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