Mohd Rudin, Nurin Awanis, et al. “Classification of Plant Health (Capsicum Frutescens) Normalize Differences Vegetation Index Using Image Processing ”. Mekatronika: Journal of Intelligent Manufacturing and Mechatronics, vol. 3, no. 1, June 2021, pp. 89-96, doi:10.15282/mekatronika.v3i1.7158.