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U-Net-Based Foreign Object Detection Method Using Effective Image Acquisition System: A Case of Almond and Green Onion Flake Food Process

Title
U-Net-Based Foreign Object Detection Method Using Effective Image Acquisition System: A Case of Almond and Green Onion Flake Food Process
Authors
Son, Guk-JinKwak, DonghoonPark, Mi-KyungKim, YoungdukJung, Hee-Chul
DGIST Authors
Son, Guk-Jin; Kwak, Donghoon; Park, Mi-Kyung; Kim, Youngduk; Jung, Hee-Chul
Issue Date
2021-12
Citation
Sustainability, 13(24)
Type
Article
Author Keywords
computer visionforeign object detectiondeep learningdata augmentation
Keywords
BODIES
ISSN
2071-1050
Abstract
Supervised deep learning-based foreign object detection algorithms are tedious, costly, and time-consuming because they usually require a large number of training datasets and annotations. These disadvantages make them frequently unsuitable for food quality evaluation and food manufacturing processes. However, the deep learning-based foreign object detection algorithm is an effective method to overcome the disadvantages of conventional foreign object detection methods mainly used in food inspection. For example, color sorter machines cannot detect foreign objects with a color similar to food, and the performance is easily degraded by changes in illuminance. Therefore, to detect foreign objects, we use a deep learning-based foreign object detection algorithm (model). In this paper, we present a synthetic method to efficiently acquire a training dataset of deep learning that can be used for food quality evaluation and food manufacturing processes. Moreover, we perform data augmentation using color jitter on a synthetic dataset and show that this approach significantly improves the illumination invariance features of the model trained on synthetic datasets. The F1-score of the model that trained the synthetic dataset of almonds at 360 lux illumination intensity achieved a performance of 0.82, similar to the F1-score of the model that trained the real dataset. Moreover, the F1-score of the model trained with the real dataset combined with the synthetic dataset achieved better performance than the model trained with the real dataset in the change of illumination. In addition, compared with the traditional method of using color sorter machines to detect foreign objects, the model trained on the synthetic dataset has obvious advantages in accuracy and efficiency. These results indicate that the synthetic dataset not only competes with the real dataset, but they also complement each other. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
URI
http://hdl.handle.net/20.500.11750/15972
DOI
10.3390/su132413834
Publisher
MDPI AG
Related Researcher
  • Author Kim, Youngduk  
  • Research Interests IoT, Disaster Respnse, Autonomous System
Files:
Collection:
Division of Automotive Technology1. Journal Articles


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