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All Journal JOURNAL OF INFORMATION SYSTEM RESEARCH (JOSH) TIN: TERAPAN INFORMATIKA NUSANTARA
Rodhiyah Mardhiyyah
Universitas Teknologi Yogyakarta, Yogyakarta
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Perbandingan Performa CNN MobileNetV2 dan K-Nearest Neighbors untuk Klasifikasi Kondisi Tanaman Cabai Tegar Wahyu Adi Saputra; Rodhiyah Mardhiyyah
TIN: Terapan Informatika Nusantara Vol 7 No 1 (2026): June 2026
Publisher : Forum Kerjasama Pendidikan Tinggi (FKPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47065/tin.v7i1.10004

Abstract

Diseases and pests affecting chili plants can reduce crop quality and productivity if not detected at an early stage. The identification of plant conditions is still commonly performed through manual visual observation, making the process prone to diagnostic errors and time-consuming. This study aims to compare the performance of a MobileNetV2-based Convolutional Neural Network (CNN) and K-Nearest Neighbors (KNN) for chili plant condition classification using digital images. The dataset consisted of 7,991 training images, 515 validation images, and 355 testing images generated through a cropping process based on bounding-box annotations, covering seven categories of chili plant conditions: Anthracnose, Aphid, Armyworm, Healthy, Leaf Spot, Whitefly, and Yellowisha. Preprocessing included image resizing to 128 × 128 pixels and normalization. The CNN model employed a MobileNetV2 architecture with transfer learning, while the KNN model utilized manually extracted features consisting of Histogram of Oriented Gradients (HOG), Local Binary Pattern (LBP), and Color Histogram. Model performance was evaluated using a confusion matrix, accuracy, precision, recall, and F1-score with a weighted-average approach. The results show that CNN outperformed KNN, achieving an accuracy of 81.69%, precision of 86.28%, recall of 81.69%, and F1-score of 81.34%, whereas KNN achieved an accuracy of 45.63%, precision of 66.80%, recall of 45.63%, and F1-score of 42.24%. The contribution of this study lies in providing a comparative analysis between deep learning and traditional machine learning approaches on a dataset encompassing diseases, pests, and healthy conditions within the same classification scenario. The findings indicate that CNN's automatic feature extraction capability produces more effective visual representations than the manually engineered features used by KNN.
Implementasi Voice Detection dan Geolocation Aplikasi Pelaporan Kejahatan di Jalan Raya Realtime Berbasis Mobile Restu Sofyan Ma'arif; Rodhiyah Mardhiyyah
Journal of Information System Research (JOSH) Vol 7 No 1 (2025): October 2025
Publisher : Forum Kerjasama Pendidikan Tinggi (FKPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47065/josh.v7i1.8527

Abstract

The prevalence of public space crimes, particularly street crimes like mugging and klithih, has become a crucial issue disrupting community safety and comfort. Current emergency reporting systems, which rely on phone calls or direct visits to police stations, are often hampered by time delays, reducing the effectiveness of intervention. To address this, an integrated crime reporting system is proposed through an Android mobile application developed using the Waterfall method. This solution enhances conventional systems by implementing Geolocation and Voice Detection technologies. Geolocation enables precise mapping of incident locations, ensuring location data remains accurate to within 9 meters even with a weak GPS signal Meanwhile, Voice Detection acts as the initial trigger for crime reporting. It proactively analyzes ambient audio for specific shout patterns, which indicate an emergency. The model achieves an accuracy of 0.9590% in noisy environments. Upon detection, the system automatically sends simultaneous emergency notifications to all nearby app users and security authorities within 2 seconds. This application is expected to significantly optimize crime response times, contributing tangibly to enhancing public safety and security.
Co-Authors Restu Sofyan Ma'arif Tegar Wahyu Adi Saputra