KURDTHONGMEE, W., and T. LAMSUB. “An Automatic System for Non-Uniform Brightness Compensation of LED Arrays: Image Processing Routines to Locate LED Centers”. Walailak Journal of Science and Technology (WJST), vol. 5, no. 2, Nov. 2011, pp. 203-16, https://wjst.wu.ac.th/index.php/wjst/article/view/90.