Imran, B., Yani, A., Muslim, R. and Zaeniah, Z. (2022) “LOMBOK PEARL QUALITY CLASSIFICATION USING A COMBINATION OF FEATURE EXTRACTION AND ARTIFICIAL NEURAL NETWORKS BASED ON SHAPE”, Jurnal Pilar Nusa Mandiri, 18(2), pp. 167-172. doi: 10.33480/pilar.v18i2.3507.