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CC BY-NC-ND V4.0, Open Access
Journal article
Weed recognition using deep learning techniques on class-imbalanced imagery
Crop and Pasture Science, Vol.74(6), CP21626
2022
Abstract
Context: Most weed species can adversely impact agricultural productivity by competing for nutrients required by high-value crops. Manual weeding is not practical for large cropping areas. Many studies have been undertaken to develop automatic weed management systems for agricultural crops. In this process, one of the major tasks is to recognise the weeds from images. However, weed recognition is a challenging task. It is because weed and crop plants can be similar in colour, texture and shape which can be exacerbated further by the imaging conditions, geographic or weather conditions when the images are recorded. Advanced machine learning techniques can be used to recognise weeds from imagery.
Aims: In this paper, we have investigated five state-of-the-art deep neural networks, namely VGG16, ResNet-50, Inception-V3, Inception-ResNet-v2 and MobileNetV2, and evaluated their performance for weed recognition.
Methods: We have used several experimental settings and multiple dataset combinations. In particular, we constructed a large weed-crop dataset by combining several smaller datasets, mitigating class imbalance by data augmentation, and using this dataset in benchmarking the deep neural networks. We investigated the use of transfer learning techniques by preserving the pre-trained weights for extracting the features and fine-tuning them using the images of crop and weed datasets.
Key results: We found that VGG16 performed better than others on small-scale datasets, while ResNet-50 performed better than other deep networks on the large combined dataset.
Conclusions: This research shows that data augmentation and fine tuning techniques improve the performance of deep learning models for classifying crop and weed images.
Implications: This research evaluates the performance of several deep learning models and offers directions for using the most appropriate models as well as highlights the need for a large scale benchmark weed dataset.
Details
- Title
- Weed recognition using deep learning techniques on class-imbalanced imagery
- Authors/Creators
- A.S.M.M. Hasan (Author/Creator)F. Sohel (Author/Creator)D. Diepeveen (Author/Creator)H. Laga (Author/Creator)M.G.K. Jones (Author/Creator)
- Publication Details
- Crop and Pasture Science, Vol.74(6), CP21626
- Publisher
- CSIRO Publishing
- Identifiers
- 991005545130807891
- Copyright
- © 2022 The Author(s) (or their employer(s)).
- Murdoch Affiliation
- Centre for Biosecurity and One Health; Centre for Crop and Food Innovation; Harry Butler Institute; Centre for Healthy Ageing; School of Information Technology; Food Futures Institute; Centre for Sustainable Farming Systems
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- Citation topics
- 4 Electrical Engineering, Electronics & Computer Science
- 4.17 Computer Vision & Graphics
- 4.17.128 Deep Visual Recognition
- Web Of Science research areas
- Agriculture, Multidisciplinary
- ESI research areas
- Agricultural Sciences