Face Recognition and Raspberry Pi Powered Smart Door Unlocking System Y. Jeevan Nagendra Kumar, G. Shiva Kumar, Kurikelly Rishik, D. Dinesh Chaitanya and Sri Charan E3S Web Conf., 391 (2023) 01087 Published online: 05 June 2023 DOI: 10.1051/e3sconf/202339101087