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• W3136376090 abstract "Knowing precise location and having accurate information about weed species is a prerequisite for developing an effective site-specific weed management (SSWM) system. Due to the effectiveness of deep learning techniques for vision-based tasks such as image classification and object detection, its use for discriminating between weeds and crops is gaining acceptance among the agricultural research community. However, limited studies have used deep learning for identifying multiple weeds in a single image and most of the studies have not compared the effectiveness of deep learning based image classification and object detection by using a common, annotated imagery dataset of early season weeds under field conditions. This study addresses the research gap by evaluating comparative performance of three different pre-trained image classification models for classifying weed species and also assesses the performance of an object detection model for locating and identifying weed species. The image classification models were trained on two commonly used deep learning frameworks i.e., Keras and PyTorch, to assess any performance differential due to the choice of framework. An annotated dataset comprising of RGB images of four, early season weeds, found in corn and soybean production system in the Midwest US, namely, cocklebur (Xanthium strumarium), foxtail (Setaria viridis), redroot pigweed (Amaranthus retroflexus), and giant ragweed (Ambrosia trifida) was used in this study. VGG16, ResNet50, and InceptionV3 pre-trained models were used for image classification. The object detection model, based on the You Only Look Once (YOLOv3) library, was trained to locate and identify different weed species within an image. The performance of image classification models was assessed using testing accuracy and F1-score metrics. Average precision (AP) and mean average precision (mAP) were used to assess the performance of the object detection model. The best performing image classification model was VGG16 with an accuracy of 98.90% and an F1-score of 99%. Faster training times and higher accuracies were observed with PyTorch. The detection model helped locate and identify multiple weeds within an image with AP scores of 43.28%, 26.30%, 89.89%, and 57.80% for cocklebur, foxtail, redroot pigweed, and giant ragweed respectively and an overall mAP score of 54.3%. The results suggest that under field conditions, use of pre-trained models for image classification and YOLOv3 for object detection are promising for identifying single and multiple weeds, respectively, given that sufficient data is available. Additionally, unlike image classification, the localization capabilities of object detection are desirable for developing a system for SSWM." @default.
• W3136376090 created "2021-03-29" @default.
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• W3136376090 date "2021-05-01" @default.
• W3136376090 modified "2023-10-18" @default.
• W3136376090 title "Performance of deep learning models for classifying and detecting common weeds in corn and soybean production systems" @default.
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• W3136376090 doi "https://doi.org/10.1016/j.compag.2021.106081" @default.
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