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Journal : JOURNAL OF INFORMATION SYSTEM RESEARCH (JOSH)

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Klasifikasi Batu Permata Berbasis Citra Menggunakan Convolutional Neural Network Rosyani, Perani; Hariansyah, Oke; Permadi, Yuda; Rosdiana, Muhamad; Nanang, Nanang
Journal of Information System Research (JOSH) Vol 7 No 2 (2026): January 2026
Publisher : Forum Kerjasama Pendidikan Tinggi (FKPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47065/josh.v7i2.9101

Abstract

Manual gemstone identification still faces several limitations, such as subjective assessment and strong dependence on expert experience, which may lead to misclassification, particularly for gemstones with similar visual characteristics. This study aims to apply a Convolutional Neural Network (CNN) for automatic visual-based gemstone image classification using a limited dataset. The dataset consists of three gemstone classes, namely Alexandrite, Almandine, and Amazonite, with a balanced class distribution. Image preprocessing includes image resizing, pixel value normalization, and data augmentation to increase data variability. The proposed CNN model is a custom architecture composed of three convolutional layers with ReLU activation, followed by max pooling, a fully connected layer with dropout, and a Softmax output layer. Model performance is evaluated using a confusion matrix and classification metrics, including accuracy, precision, recall, and F1-score. Experimental results show that the CNN model achieves a testing accuracy of 93.33% on the limited test dataset with relatively balanced performance across classes. However, analysis of the training and validation curves indicates the presence of overfitting, suggesting that the model’s generalization capability to unseen data remains limited. These findings highlight that the achieved accuracy is conditional on the specific and constrained dataset used. Therefore, future work is recommended to expand dataset size and diversity, apply more comprehensive data augmentation strategies, and explore transfer learning approaches to improve model stability and generalization performance.
Co-Authors A. Harbelubun, Y. Claudia Dhian Aflaah, Gina Ramadhantie Agung Wicaksono Ahdan, Alfin Muhamad Albi, Albi Amin Hidayat Amin Hidayat Anggreni, Made Ayu Ariansyah, Zul Asmara, Adi Awaliyah, Saiyah Azhari, Sonia Nada Nur Bakkara, Eko Fransisko Dede Sandi Dety Mulyanti Dewi Tresnawati Dwi Fitria Alfiani Endang Susilawati F Ramdan, Dadan Fajri, Mufti Al Fauzan, Wildan Ahmad Nur Febrianti, Risma Melati Fitri Nuraeni Fitriyani, Ranti Gilang Prayoga, Agung Gulo, Hasrat Setiawan Hafidli, Dedi Hafidzah, Afiyah Nur Hamdi, Wildan Hidayatul Hamzani, Umiaty Handayani, Nanda Harahap, Raja Sakti Putra Hariansyah, Oke Hazar, Aura Fitria Helisa Noviarty Hendri Tanjung Hidayat, Tedi Hidayati, Salmaa Ishma Hidayattuloh, Yusuf Hizkil, Muhamad Ibdalsyah Ibdalsyah Irawan, Muhammad Randy Iving Arisdiyoto Iwan Supardi Jaelani, Jaka Muhammad Jubaedah, Dede JUNIANTO JUNIANTO Kahfi, Mochammad Lely Panca Andriyanto Leni Fitriani, Leni Lulu, Lulu Mansyur, Syafi’in Mayasari, Nanny Meidy Fajar Wahyu Mira Febrina, Mira Mubarok, Dede Miftahul Muhamad Lutfi Azizan Muhammad Farhan Muhammad Najhan Tsaani Muhammad Ray Azhar Ramadhan Muhammad Syahdan Muttaqin, Epwan Nurul MY Alief Samboro N, Novita Fitri Najwa Masayu Azzahra Nashier, Luthfi Abdurahman Niken Launingtia, I Gusti Ayu Nugraha, Muhammad Dimas Maulana Nur Sehang Thamrin Nurahman, Gia Nuraina, Nuraina Nurbayani, Yesi Nurhafsari, Asri Nurhisyam, Fahmi Nurisma, Arnel Nurlaila, Farida Oktaviani, Vera Otoviany, Siti Pascal Ismail Patriani, Ira Perani Rosyani Poerba, Arsyad Purnamawati, Santi Ayu Ramli, Akhmad Ratnawati Ratnawati Reza, Mohamad Rohmah, Yuni Syifau Rosdiana, Muhamad Rusdiawan, Mohamad Mihradi Rusman Rusman Saban, Veliana Putri Ayu Salsabil, Ilham santoso, Ekbal Sari Rusmita Sari, Nabila Yunita Sari, Vella Aprilia Septiano Alvian Ismau Sihombing, Dina Agnesia Sikki, Nurhaeni Sopiyan Apandi Suhaendi, Ocha Febriana Suhara, Ade Surur, Yoga Muhammad Suryadi, Nanda Suryaningrat, Suryaningrat Sutisna, Eva Noviani Suyanto, Ryan Syaeful Machfud Syaeful, Syaeful Syilfia Hasti Tanu, Kristo Derbi Relison Thomas Hanandry Dewanto Wafa, Adhima Rasyadani Wahyu, Meidy Fajar Wiguna, Nafis Surya Yantiana, Nella Yasin Kamil Yolanda, Sevliana Prisca Yuda Permadi, Yuda Yuda Samudra Yusepaldo Pasharibu Yusuf, Alifa Witri Alfahira Zaki, Fuad Zayyan, Alif