Journal
APPLIED GEOMATICS
Volume 12, Issue 3, Pages 247-263Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s12518-019-00292-5
Keywords
Multispectral cameras; UAV; NDVI; Image processing
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Funding
- Bill and Melinda Gates Foundation [OPP1070785]
- Bill and Melinda Gates Foundation [OPP1070785] Funding Source: Bill and Melinda Gates Foundation
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Agricultural UAV-based remote sensing tools to facilitate decision-making for increasing productivity in developing countries were developed and tested. Specifically, a high-quality multispectral sensor and sophisticated-yet-user-friendly data processing techniques (software) under an open-access policy were implemented. The multispectral sensor-IMAGRI-CIP-is a low-cost adaptable multi-sensor array that allows acquiring high-quality and low-SNR images from a UAV platform used to estimate vegetation indexes such as NDVI. Also, a set of software tools that included wavelet-based image alignment, image stitching, and crop classification have been implemented and made available to the remote sensing community. A validation field experiment carried out at the International Potato Center facilities (Lima, Peru) to test the developed tools is reported. A thorough comparison study with a wide-used commercial agricultural camera showed that IMAGRI-CIP provides highly correlated NDVI values (R-2 >= 0.8). Additionally, an application field experiment was conducted in Kilosa, Tanzania, to test the tools in smallholder farm settings, featuring high-heterogeneous crop plots. Results showed high accuracy (> 82%) to identify 13 different crops either as mono-crop or as mixed-crops.
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