News Release

DomAda-FruitDet: domain-adaptive anchor-free fruit detection model for auto labeling

Peer-Reviewed Publication

Nanjing Agricultural University The Academy of Science

Figure 2.


 Flowchart for using DomAda-FruitDet to improve the accuracy of the EasyDAM method, with the labeled target domain synthetic fruit dataset as input and the obtained labeled target domain actual fruit dataset as output.

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Credit: Plant Phenomics

In the evolving landscape of the modern fruit industry, deep learning-based fruit detection applications have become integral, facilitating tasks such as fruit yield prediction and automated picking. Despite advancements, the labor-intensive process of training data labeling remains a bottleneck. Previous research introduced EasyDAM method, leveraged generative adversarial networks to bridge the gap between labeled source domain datasets and unlabeled target domain images, achieving notable success in auto-labeling. However, challenges persist due to a significant "domain gap" between the synthetic training data and the real-world application data, particularly regarding foreground object scale and background inconsistencies.

In January 2024, Plant Phenomics published a research article entitled by “DomAda-FruitDet: Domain-Adaptive Anchor-Free Fruit Detection Model for Auto Labeling”. This study aims to refine the detection model design to mitigate domain gaps, enhancing the generalization capability of deep learning models for more accurate and efficient fruit detection in smart orchards.

Researchers developed DomAda-FruitDet, a domain-adaptive anchor-free fruit detection model integrating a double prediction layer-based foreground domain-adaptive structure for generating adaptive bounding boxes, effectively bridging the foreground domain gap, and employs a background domain-adaptive strategy via sample allocation to mitigate the background domain gap. Tested across various fruit datasets, including apple, tomato, pitaya, and mango, DomAda-FruitDet achieved impressive average precision scores of 90.9%, 90.8%, 88.3%, and 94.0%, respectively, signifying a substantial improvement in auto-labeling precision. The efficacy of this model was further validated through extensive experiments utilizing datasets from EasyDAMv1 and EasyDAMv2 which encompass both synthetic and actual fruit images. The results demonstrate its capability to adaptively generate high-quality labels even when facing significant domain discrepancies.

In conclusion, the innovative approach of DomAda-FruitDet not only substantially reduces the labor and time required for data labeling in the fruit industry but also paves the way for more accurate and efficient deployment of smart orchard technologies. Through overcoming the intricate challenges of domain gaps, the model showcases promise for enhancing the generalization and applicability of deep learning models in agriculture and beyond, indicating a leap towards more intelligent and autonomous agricultural practices.




Wenli  Zhang1*, Chao  Zheng1, Chenhuizi  Wang1, and Wei  Guo2*


1Information Department, Beijing University of Technology, Beijing 100022, China.

2Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 188-0002, Japan.

About  Wenli  Zhang

She is a Professor in the Information Department at Beijing University of Technology. Her research areas are Image Processing and Pattern Recognition. She has published more than 30 international papers, and authorized more than 10 intellectual property rights.

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