InComTech: Jurnal Telekomunikasi dan Komputer
Vol. 16 No. 2 (2026)

Hybrid Deep Learning–Machine Learning for Bird’s Eye Chili Quality Classification

Tri Raharjo Yudantoro (Politeknik Negeri Semarang)
Zulfa Nurma Novita Sari (Unknown)
Tulus Pramuji (Unknown)
Eko Supriyanto (Unknown)
Wahyu Sulistyo (Unknown)
Agus Suwondo (Unknown)
Sindi (Unknown)
Ilham Rizky Harijanto (Unknown)



Article Info

Publish Date
31 Aug 2026

Abstract

The manual inspection of dried bird’s eye chili (Capsicum frutescens L.) is prevalent yet susceptible to subjectivity, inter-rater variability, and low efficiency. This research introduces a hybrid deep learning and machine learning pipeline for the classification of images into three categories: fresh, medium, and dried. The method encompasses staged image acquisition throughout the drying process, preprocessing (including HEIC to PNG conversion, background elimination, scaling, and normalizing), and real-time augmentation to enhance robustness. Feature embeddings are obtained from MobileNetV2 by transfer learning utilizing a Global Average Pooling head and are evaluated against EfficientNetB0, NASNetMobile, ResNet50, and DenseNet121. The embeddings are categorized using various algorithms: Random Forest (RF), Support Vector Machine, and a shallow Artificial Neural Network, with RF selected for its consistent performance. Evaluation employs an 80/20 split, focusing on accuracy, precision, recall, F1-score, and confusion matrix analysis. Results indicate that MobileNetV2 produces the most distinctive features, whereas RF provides the most reliable downstream predictions: the system achieves 94% validation accuracy during feature extraction and 91% at the final classification stage, alongside high precision-recall and minimal misclassification. The chosen MobileNetV2+RF model is implemented in an Android application for real-time inference from smartphone photos, providing class labels and a moisture-level signal based on mass-loss measurements to aid postharvest decisions. The contributions consist of an objective and efficient quality-assessment pipeline, an empirical model comparison, and a deployable mobile implementation. Future endeavors will focus on extensive datasets, multimodal signals, and cross-variety generalization. 

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Journal Info

Abbrev

Incomtech

Publisher

Subject

Computer Science & IT Electrical & Electronics Engineering Engineering

Description

Program Studi Magister Teknik Elektro UMB menerbitkan Jurnal InComTech sebagai wadah bagi para akademisi, praktisi dan penggiat lainnya dalam bidang telekomunikasi dan computer (Information and Communication Technology/ICT) untuk menerbitkan karya tulisnya. Bidang-bidang yang menjadi bahasan jurnal ...