M.Zainul Arifin, Koko Joni, and Miftachul Ulum. “Penentuan Kualitas Warna Batu Blue Sapphire Dengan Image Processing Menggunakan Metode RGB To HSV”. SinarFe7 2, no. 1 (May 3, 2023): 59–63. Accessed May 19, 2024. https://journal.fortei7.org/index.php/sinarFe7/article/view/399.