نوع مقاله : مقاله پژوهشی
نویسندگان
گروه مهندسی ماشینهای کشاورزی، دانشکده مهندسی و فناوری کشاورزی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Maintaining the well-being of individuals is greatly influenced by a healthy lifestyle and balanced diet. The identification and segmentation of food items can be improved by utilizing a mobile-based system in this era of rapid lifestyle changes and technology. This article introduces a novel system that, upon receiving input images, detects and segmentation the food items within the images. The system utilizes deep learning techniques and models, employing the YOLO algorithm. By incorporating regression-based simple methods, the system achieves the capability to detect and categorize food items in a single pass through the network, aiming to enhance accuracy and speed in the detection process. YOLOv7 was employed for food detection and YOLOv5, YOLOv7, and YOLOv8 was utilized for image segmentation. Based on the results, the accuracy, recall, and average precision values for YOLOv7 were 0.844, 0.924, and 0.932, respectively. Furthermore, the instance segmentation performance of YOLOv7 outperformed YOLOv5 and YOLOv8, with precision, recall, and mean average precision values of 0.959, 0.943, and 0.906, respectively. These findings underscore the high accuracy in detecting Iranian foods and the remarkable speed and precision in food image segmentation attainable through advanced deep-learning algorithms. Consequently, this study establishes that accurate detection of Iranian foods can be accomplished through the utilization of sophisticated deep-learning techniques. This research focuses on promoting a healthy lifestyle through intelligent technology and novel deep learning algorithms in Iran.
کلیدواژهها [English]
Detection of Iranian Foods in Images Using Deep Learning
EXTENDED ABSTRACT
Recent attention has been drawn to the application of deep learning models in various domains, with a particular focus on nutritional analysis and food quality evaluation. This study explores the use of YOLO-based models, including YOLOv5, YOLOv7, and YOLOv8, for the automatic detection and segmentation of Iranian cuisine.
The primary aim of this study is to assess the effectiveness of several YOLO-based algorithms in detecting specific food classes commonly found in Iranian meals. YOLOv7 is employed for the detection of 22 food classes, while instance segmentation for 19 different food classes is conducted using YOLOv5, YOLOv7, and YOLOv8.
A meticulously curated dataset of Iranian food images serves as the training data for the models. To ensure the models' robustness and generalization, the dataset comprises images captured under various lighting conditions and from different viewpoints. Transfer learning strategies and hyperparameter optimization techniques are employed to enhance model precision and effectiveness.
The YOLOv7 image detection method was employed to detect 22 types of Iranian food items. YOLOv7 utilized deep convolutional neural networks for hierarchical feature learning from images. After training the model with 100 epochs, its performance remained stable, justifying the choice of 40 epochs for training. YOLOv7 achieved satisfactory results, with average precision values of 77% for food detection. The model demonstrated good performance with a mean average precision and recall of 75.0% and 66.9%, respectively. However, YOLOv7 exhibited imbalanced accuracy in classifying different food classes, ranging from 50% for "Greens" and "Ketchup" to 100% for "Havij Polo" and "Kuku Sabzi." Improving accuracy in specific classes can be achieved by augmenting the training dataset and fine-tuning the model. Other factors, like hyperparameter adjustments, can also influence performance.
Evaluation of classification models, i.e., YOLOv5, YOLOv7, and YOLOv8 indicated that YOLOv7 outperformed the others with an accuracy value of 0.955. YOLOv7 showed a mean average precision value of 94.5%, making it the best model. Fine-tuning and post-processing techniques could further improve the accuracy in specific classes. In conclusion, YOLOv7 proved to be a strong and efficient method for detecting and classifying Iranian food items.
The research highlights the significance of accurate food detection and segmentation in Iranian cuisines, enabling applications in food quality assessment, health monitoring, and dietary analysis. Furthermore, the study emphasizes the impact of different YOLO-based models on performance metrics and their potential to enhance computer vision applications.
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