DOI: https://doi.org/10.14710/jmasif.16.2.73168

Optimizing VGG16 Architecture with Bayesian Hyperparameter Tuning for Tomato Leaf Disease Classification

Departement of Informatics, Universitas Diponegoro, Jl. Prof Jacob Rais, Tembalang, Semarang, Indonesia 50275 , Indonesia

Received: 12 May 2025; Revised: 12 Jun 2025; Accepted: 16 Jun 2025; Published: 18 Jun 2025.
Open Access Copyright (c) 2025 The authors. Published by Department of Informatics Universitas, Diponegoro
Creative Commons License This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

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Abstract
This study proposes an optimized VGG16 architecture enhanced through Bayesian Optimization to improve the classification of tomato leaf diseases. The modified model integrates tunable parameters such as dropout rates, convolutional filters, and dense units, while maintaining the foundational structure of VGG16. To further refine performance, Bayesian Optimization is employed to search for the most effective combination of hyperparameters. Experiments conducted using the Tomato Leaf Disease Detection dataset demonstrate that the proposed method outperforms the original VGG16 model, achieving a test accuracy of 97.1% compared to 89.0%. These results underline the importance of architecture customization and systematic hyperparameter tuning for domain-specific deep learning tasks in agriculture.
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Keywords: Tomato leaf disease; VGG16; Bayesian Optimization; Deep learning; Image classification; Hyperparameter tuning

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Section: Research Article
Language : EN
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