Analysis of UAV-Based Vegetation Indices for Rice Monitoring
摘要
Rice is a crucial component of food security in many countries worldwide. To meet the increasing global demand, precision agriculture has become essential for optimizing rice production. This study presents a technique for extracting detailed information on paddy growth characteristics using high-resolution aerial imagery acquired through UAV platforms. The research was conducted on a 70-hectare (175-acre) paddy field located in Kampung Sawah Sagil, Batu Pahat, Johor, Malaysia. Over a period from day 9 to day 117 of the paddy growth cycle, nine series of aerial images were captured, providing data with high temporal, spatial, and spectral resolution. The collected images underwent extensive processing to generate digital products used to derive key vegetation indices for analyzing rice growth stages. Specifically, the Visible Atmospherically Resistant Index (VARI), Green Normalized Difference Vegetation Index (GNDVI), Normalized Difference Vegetation Index (NDVI), and Normalized Difference Red Edge Index (NDRE) were calculated for each of the nine acquisition dates. The analysis of these time-series indices revealed a strong correlation with the different stages of rice growth, demonstrating the effectiveness of UAV-based remote sensing in monitoring and managing rice crops.