Improved Classification Approach for Fruits and Vegetables Freshness Based on Deep Learningopen access
- Authors
- Mukhiddinov, Mukhriddin; Muminov, Azamjon; Cho, Jinsoo
- Issue Date
- Nov-2022
- Publisher
- MDPI
- Keywords
- fruit classification; fruit and vegetable freshness; YOLOv4; computer vision; object detection; deep learning; convolutional neural network
- Citation
- SENSORS, v.22, no.21
- Journal Title
- SENSORS
- Volume
- 22
- Number
- 21
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/86163
- DOI
- 10.3390/s22218192
- ISSN
- 1424-8220
- Abstract
- Classification of fruit and vegetable freshness plays an essential role in the food industry. Freshness is a fundamental measure of fruit and vegetable quality that directly affects the physical health and purchasing motivation of consumers. In addition, it is a significant determinant of market price; thus, it is imperative to study the freshness of fruits and vegetables. Owing to similarities in color, texture, and external environmental changes, such as shadows, lighting, and complex backgrounds, the automatic recognition and classification of fruits and vegetables using machine vision is challenging. This study presents a deep-learning system for multiclass fruit and vegetable categorization based on an improved YOLOv4 model that first recognizes the object type in an image before classifying it into one of two categories: fresh or rotten. The proposed system involves the development of an optimized YOLOv4 model, creating an image dataset of fruits and vegetables, data argumentation, and performance evaluation. Furthermore, the backbone of the proposed model was enhanced using the Mish activation function for more precise and rapid detection. Compared with the previous YOLO series, a complete experimental evaluation of the proposed method can obtain a higher average precision than the original YOLOv4 and YOLOv3 with 50.4%, 49.3%, and 41.7%, respectively. The proposed system has outstanding prospects for the construction of an autonomous and real-time fruit and vegetable classification system for the food industry and marketplaces and can also help visually impaired people to choose fresh food and avoid food poisoning.
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