| Full text | |
| Author(s): |
Pereira, Francisco R. da S.
;
Dos Reis, Aliny A.
;
Freitas, Rodrigo G.
;
Oliveira, Stanley R. de M.
;
do Amaral, Lucas R.
;
Figueiredo, Gleyce K. D. A.
;
Antunes, Joao F. G.
;
Lamparelli, Rubens A. C.
;
Moro, Edemar
;
Magalhaes, Paulo S. G.
Total Authors: 10
|
| Document type: | Journal article |
| Source: | ISPRS INTERNATIONAL JOURNAL OF GEO-INFORMATION; v. 12, n. 2, p. 15-pg., 2023-02-01. |
| Abstract | |
The recent advances in unmanned aerial vehicle (UAV)-based remote sensing systems have broadened the remote sensing applications for agriculture. Despite the great possibilities of using UAVs to monitor agricultural fields, specific problems related to missing parts in UAV orthomosaics due to drone flight restrictions are common in agricultural monitoring, especially in large areas. In this study, we propose a methodological framework to impute missing parts of UAV orthomosaics using PlanetScope (PS) and Sentinel-2 (S2) data and the random forest (RF) algorithm of an integrated crop-livestock system (ICLS) covered by grass at the time. We validated the proposed framework by simulating and imputing artificial missing parts in a UAV orthomosaic and then comparing the original data with the model predictions. Spectral bands and the normalized difference vegetation index (NDVI) derived from PS, as well as S2 images (separately and combined), were used as predictor variables of the UAV spectral bands and NDVI in developing the RF-based imputation models. The proposed framework produces highly accurate results (RMSE = 6.77-17.33%) with a computationally efficient and robust machine-learning algorithm that leverages the wealth of empirical information present in optical satellite imagery (PS and S2) to impute up to 50% of missing parts in a UAV orthomosaic. (AU) | |
| FAPESP's process: | 17/50205-9 - Monitoring integrated crop-livestock systems through remote sensing and precision agriculture for more sustainable production - towards low carbon agriculture |
| Grantee: | Paulo Sergio Graziano Magalhães |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 18/24985-0 - Methodology for mapping and monitoring different pasture-based Livestock management and Mixed Crop-Livestock systems with remote sensing |
| Grantee: | Aliny Aparecida dos Reis |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |