Cluster analysis based on image feature extraction for automated OMA by Abu Hasan, Muhammad Danial, Saufi, Syahril Ramadhan, Isham, M. Firdaus, Mad Saad, Shaharil, A. Saad, W. Aliff, Ahmad, Zair Asrar, Leong, Mohd. Salman, Lim, Meng Hee, Md. Idris, M. Haffizzi