UAV Remote Sensing Estimation of Rice Yield Based on Adaptive Spectral Endmembers and Bilinear Mixing Model
The accurate estimation of rice yield using remote sensing (RS) technology is crucially important for agricultural decision-making. The rice yield estimation model based on the vegetation index (VI) is commonly used when working with RS methods, however, it is affected by irrelevant organs and backg...
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| Format: | Article |
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MDPI AG
2021-06-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/13/11/2190 |
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| author | Ningge Yuan Yan Gong Shenghui Fang Yating Liu Bo Duan Kaili Yang Xianting Wu Renshan Zhu |
| author_facet | Ningge Yuan Yan Gong Shenghui Fang Yating Liu Bo Duan Kaili Yang Xianting Wu Renshan Zhu |
| author_sort | Ningge Yuan |
| collection | DOAJ |
| description | The accurate estimation of rice yield using remote sensing (RS) technology is crucially important for agricultural decision-making. The rice yield estimation model based on the vegetation index (VI) is commonly used when working with RS methods, however, it is affected by irrelevant organs and background especially at heading stage. The spectral mixture analysis (SMA) can quantitatively obtain the abundance information and mitigate the impacts. Furthermore, according to the spectral variability and information complexity caused by the rice cropping system and canopy characteristics of reflection and scattering, in this study, the multi-endmember extraction by the pure pixel index (PPI) and the nonlinear unmixing method based on the bandwise generalized bilinear mixing model (NU-BGBM) were applied for SMA, and the VI<sub>E</sub> (VIs recalculated from endmember spectra) was integrated with abundance data to establish the yield estimation model at heading stage. In two paddy fields of different cultivation settings, multispectral images were collected by an unmanned aerial vehicle (UAV) at booting and heading stage. The correlation of several widely-used VIs and rice yield was tested and weaker at heading stage. In order to improve the yield estimation accuracy of rice at heading stage, the VI<sub>E</sub> and foreground abundances from SMA were combined to develop a linear yield estimation model. The results showed that VI<sub>E</sub> incorporated with abundances exhibited a better estimation ability than VI alone or the product of VI and abundances. In addition, when the structural difference of plants was obvious, the addition of the product of VI<sub>F</sub> (VIs recalculated from bilinear endmember spectra) and the corresponding bilinear abundances to the original product of VI<sub>E</sub> and abundances, enhanced model reliability. VIs using the near-infrared bands improved more significantly with the estimation error below 8.1%. This study verified the validation of the targeted SMA strategy while estimating crop yield by remotely sensed VI, especially for objects with obvious different spectra and complex structures. |
| first_indexed | 2024-03-10T10:43:57Z |
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| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-10T10:43:57Z |
| publishDate | 2021-06-01 |
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| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-6cc78def0a74496b88fe6503ef7f0c0b2023-11-21T22:45:13ZengMDPI AGRemote Sensing2072-42922021-06-011311219010.3390/rs13112190UAV Remote Sensing Estimation of Rice Yield Based on Adaptive Spectral Endmembers and Bilinear Mixing ModelNingge Yuan0Yan Gong1Shenghui Fang2Yating Liu3Bo Duan4Kaili Yang5Xianting Wu6Renshan Zhu7School of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079, ChinaSchool of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079, ChinaSchool of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079, ChinaHubei Institute of Photogrammetry and Remote Sensing, Wuhan 430074, ChinaSchool of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079, ChinaSchool of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079, ChinaLab of Remote Sensing for Precision Phenomics of Hybrid Rice, Wuhan University, Wuhan 430079, ChinaLab of Remote Sensing for Precision Phenomics of Hybrid Rice, Wuhan University, Wuhan 430079, ChinaThe accurate estimation of rice yield using remote sensing (RS) technology is crucially important for agricultural decision-making. The rice yield estimation model based on the vegetation index (VI) is commonly used when working with RS methods, however, it is affected by irrelevant organs and background especially at heading stage. The spectral mixture analysis (SMA) can quantitatively obtain the abundance information and mitigate the impacts. Furthermore, according to the spectral variability and information complexity caused by the rice cropping system and canopy characteristics of reflection and scattering, in this study, the multi-endmember extraction by the pure pixel index (PPI) and the nonlinear unmixing method based on the bandwise generalized bilinear mixing model (NU-BGBM) were applied for SMA, and the VI<sub>E</sub> (VIs recalculated from endmember spectra) was integrated with abundance data to establish the yield estimation model at heading stage. In two paddy fields of different cultivation settings, multispectral images were collected by an unmanned aerial vehicle (UAV) at booting and heading stage. The correlation of several widely-used VIs and rice yield was tested and weaker at heading stage. In order to improve the yield estimation accuracy of rice at heading stage, the VI<sub>E</sub> and foreground abundances from SMA were combined to develop a linear yield estimation model. The results showed that VI<sub>E</sub> incorporated with abundances exhibited a better estimation ability than VI alone or the product of VI and abundances. In addition, when the structural difference of plants was obvious, the addition of the product of VI<sub>F</sub> (VIs recalculated from bilinear endmember spectra) and the corresponding bilinear abundances to the original product of VI<sub>E</sub> and abundances, enhanced model reliability. VIs using the near-infrared bands improved more significantly with the estimation error below 8.1%. This study verified the validation of the targeted SMA strategy while estimating crop yield by remotely sensed VI, especially for objects with obvious different spectra and complex structures.https://www.mdpi.com/2072-4292/13/11/2190riceyieldremote sensing (RS)spectral mixture analysis (SMA)multiple endmembersbilinear mixing model (BMM) |
| spellingShingle | Ningge Yuan Yan Gong Shenghui Fang Yating Liu Bo Duan Kaili Yang Xianting Wu Renshan Zhu UAV Remote Sensing Estimation of Rice Yield Based on Adaptive Spectral Endmembers and Bilinear Mixing Model Remote Sensing rice yield remote sensing (RS) spectral mixture analysis (SMA) multiple endmembers bilinear mixing model (BMM) |
| title | UAV Remote Sensing Estimation of Rice Yield Based on Adaptive Spectral Endmembers and Bilinear Mixing Model |
| title_full | UAV Remote Sensing Estimation of Rice Yield Based on Adaptive Spectral Endmembers and Bilinear Mixing Model |
| title_fullStr | UAV Remote Sensing Estimation of Rice Yield Based on Adaptive Spectral Endmembers and Bilinear Mixing Model |
| title_full_unstemmed | UAV Remote Sensing Estimation of Rice Yield Based on Adaptive Spectral Endmembers and Bilinear Mixing Model |
| title_short | UAV Remote Sensing Estimation of Rice Yield Based on Adaptive Spectral Endmembers and Bilinear Mixing Model |
| title_sort | uav remote sensing estimation of rice yield based on adaptive spectral endmembers and bilinear mixing model |
| topic | rice yield remote sensing (RS) spectral mixture analysis (SMA) multiple endmembers bilinear mixing model (BMM) |
| url | https://www.mdpi.com/2072-4292/13/11/2190 |
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