Chairani Fauzi
Institut Informatika dan Bisnis Darmajaya, Bandar Lampung

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Optimasi Pengenalan Plat Nomor Kendaraan Berbasis Mobile Menggunakan Google ML Kit: Implementasi dan Analisis Akurasi Mohamamd Hanan Gaffari; Chairani Fauzi
Journal of Information System Research (JOSH) Vol 7 No 4 (2026): July 2026
Publisher : Forum Kerjasama Pendidikan Tinggi (FKPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47065/josh.v7i4.10159

Abstract

Manual vehicle identification in parking systems and access control is still slow, error-prone, and inefficient, while the number of vehicles in Indonesia continues to increase. This study aims to design and implement a mobile-based vehicle license plate recognition system using Google ML Kit Text Recognition on the Android platform. Google ML Kit is used as an OCR SDK with a pre-trained model; therefore, this study does not retrain a CNN model and does not claim to develop a deep learning architecture from scratch. The contribution of this study is to provide an Android-based license plate OCR implementation workflow, integrate recognition results with a Supabase database, and evaluate character-level accuracy on license plate images. The system workflow consists of license plate image acquisition, lightweight client-side preprocessing, on-device text recognition, OCR result normalization, database matching, and character-level accuracy evaluation. The test data consist of 25 license plate images collected from a public Kaggle dataset. The results show that 20 out of 25 plates were read perfectly, while five samples contained partial recognition errors. Of 201 tested characters, 194 were correctly recognized, resulting in an average character recognition accuracy of 96.5%. Recognition errors were mainly affected by similar character shapes, image quality, light reflection, capture angle, and blur. These results indicate that Google ML Kit can be applied as a practical mobile OCR solution, although the validation remains limited by the small number and limited variation of test samples.
Perbandingan Algoritma Machine Learning untuk Prediksi Potensi Tsunami di Pesisir Barat Lampung Kevin Ramses Stifan; Chairani Fauzi
Jutisi : Jurnal Ilmiah Teknik Informatika dan Sistem Informasi Vol 14, No 3: Desember 2025
Publisher : STMIK Banjarbaru

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35889/jutisi.v14i3.3184

Abstract

Indonesia has a high level of vulnerability to tsunami disasters due to seismic activity in subduction zones. This condition requires a fast and accurate tsunami potential prediction system to support effective disaster mitigation. This study aims to compare the performance of five machine learning algorithms in predicting tsunami potential along the West Coast of Lampung, namely Random Forest, K-Nearest Neighbor, Naïve Bayes, Neural Network, and Decision Tree. The dataset consists of 352 earthquake records from 2023–2024 obtained from BMKG, using parameters such as magnitude, depth, and epicentral distance. Model evaluation was conducted using a Confusion Matrix with performance metrics including accuracy, precision, recall, and F1-score. The results indicate that the Random Forest algorithm achieved the best performance with an accuracy of 100% and balanced precision, recall, and F1-score values. These findings are expected to support the development of a machine learning-based tsunami early warning system that is adaptive to local geophysical characteristics.Keywords: Earthquake; Machine Learning; Random Forest; Tsunami prediction AbstrakIndonesia memiliki tingkat kerentanan yang tinggi terhadap bencana tsunami akibat aktivitas gempa bumi di zona subduksi. Kondisi ini menuntut tersedianya sistem prediksi potensi tsunami yang cepat dan akurat untuk mendukung mitigasi bencana. Penelitian ini bertujuan membandingkan kinerja lima algoritma machine learning dalam memprediksi potensi tsunami di Pesisir Barat Lampung, yaitu Random Forest, K-Nearest Neighbor, Naïve Bayes, Neural Network, dan Decision Tree. Data yang digunakan berupa 352 catatan gempa bumi periode 2023–2024 yang bersumber dari BMKG dengan parameter magnitudo, kedalaman, dan jarak episentrum. Evaluasi model dilakukan menggunakan Confusion Matrix dengan metrik akurasi, presisi, recall, dan F1-score. Hasil penelitian menunjukkan bahwa algoritma Random Forest memberikan performa terbaik dengan tingkat akurasi 100% serta keseimbangan nilai presisi, recall, dan F1-score. Temuan ini diharapkan dapat mendukung pengembangan sistem peringatan dini tsunami berbasis machine learning yang adaptif terhadap karakteristik geofisika lokal.