Low-Cost Online Monitoring System for the Etching Process in Fiber Optic Sensors by Computer Vision. - Wenceslao Eduardo Rodríguez-Rodríguez; Jesús Abraham Puente-Sujo; Adolfo Josué Rodríguez-Rodríguez; Ignacio R. Matías; David Tomás Vargas-Requena; Luis Antonio García-Garza (Sensors, 2023)