Development and Validation of a Digital Image Processing-Based Pill Detection Tool for an Oral Medication Self-Monitoring System. - Jannis Holtkötter; Rita Amaral; Rute Almeida; Cristina Jácome; Ricardo Cardoso; Ana Pereira; Mariana Pereira; Ki H. Chon; João Almeida Fonseca (Sensors, 2022)