Cited by 305Smart Agriculture and AIRemote Sensing in AgricultureRemote-Sensing Image Classification

WeedMap: a large-scale semantic weed mapping framework using aerial multispectral imaging and deep neural network for precision farming

Open access
Sa, Inkyu, Popović, Marija, Khanna, Raghav, Chen, Zetao, Lottes, Philipp, Liebisch, Frank, Nieto, Juan, Stachniss, Cyrill +2 more·2018·Remote Sensing

Abstract

The ability to automatically monitor agricultural fields is an important capability in precision farming, enabling steps towards more sustainable agriculture. Precise, high-resolution monitoring is a key prerequisite for targeted intervention and the selective application of agro-chemicals. The main goal of this paper is developing a novel crop/weed segmentation and mapping framework that processes multispectral images obtained from an unmanned aerial vehicle (UAV) using a deep neural network (DNN). Most studies on crop/weed semantic segmentation only consider single images for processing and classification. Images taken by UAVs often cover only a few hundred square meters with either color only or color and near-infrared (NIR) channels. Although a map can be generated by processing single segmented images incrementally, this requires additional complex information fusion techniques which struggle to handle high fidelity maps due to their computational costs and problems in ensuring global consistency. Moreover, computing a single large and accurate vegetation map (e.g., crop/weed) using a DNN is non-trivial due to difficulties arising from: (1) limited ground sample distances (GSDs) in high-altitude datasets, (2) sacrificed resolution resulting from downsampling high-fidelity images, and (3) multispectral image alignment. To address these issues, we adopt a stand sliding window approach that operates on only small portions of multispectral orthomosaic maps (tiles), which are channel-wise aligned and calibrated radiometrically across the entire map. We define the tile size to be the same as that of the DNN input to avoid resolution loss. Compared to our baseline model (i.e., SegNet with 3 channel RGB (red, green, and blue) inputs) yielding an area under the curve (AUC) of [background=0.607, crop=0.681, weed=0.576], our proposed model with 9 input channels achieves [0.839, 0.863, 0.782]. Additionally, we provide an extensive analysis of 20 trained models, both qualitatively and quantitatively, in order to evaluate the effects of varying input channels and tunable network hyperparameters. Furthermore, we release a large sugar beet/weed aerial dataset with expertly guided annotations for further research in the fields of remote sensing, precision agriculture, and agricultural robotics.

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  • Better cropping systems, fertilization, irrigation practices, and advanced digital agriculture technologies can reduce N fertilizer input and N2O emissions.

    “Better cropping systems, fertilization, and irrigation practices, and the use of advanced digital agriculture technologies, such as multi-sensor drone technology to allow farmers to manage crops, soil, fertilization, and irrigation more effectively and precisely, can reduce N fertilizer input and N2O emissions.117,118”

    From Technologies and perspectives for achieving carbon neutrality (2021) · cites this paper as [118]

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Authors
Sa, I., Popović, M., Khanna, R., Chen, Z., Lottes, P., Liebisch, F., Nieto, J., Stachniss, C., Walter, A., & Siegwart, R.
Affiliations
  • ETH Zurich (CH)
  • University of Bonn (DE)
Corresponding author
Sa, Inkyu
Venue
Remote Sensing
Publisher
MDPI AG
Published
2018-09-07
Volume
10
Issue
9
Pages
1423
ISSN
2072-4292 (ISSN-L)
OpenAlex
W2886554959
Cited by
305
References
49
Citations by year
2026: 37 · 2025: 42 · 2024: 43 · 2023: 49 · 2022: 33 · 2021: 43 · 2020: 37 · 2019: 20 · 2018: 1
FWCI
22.35
Type
journal article
Language
en
Open access
Locations
  • Remote Sensing (publishedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Repository for Publications and Research Data (ETH Zurich) (submittedVersion, cc-by)
  • ETH Zürich Research Collection (cc-by)
Funders
  • Horizon 2020 (644227)
  • The Swiss State Secretariat for Education, Research and Innovation (15.0029)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Smart Agriculture and AI
  • Physical Sciences › Environmental Science › Ecology › Remote Sensing in Agriculture
  • Physical Sciences › Engineering › Media Technology › Remote-Sensing Image Classification
Keywords
weed mapping, crop segmentation, semantic segmentation, multispectral imagery, unmanned aerial vehicles, precision agriculture, sugar beet, sliding window, SegNet, near-infrared channel, radiometric calibration, agricultural robotics, aerial image dataset

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