PT Unknown AU Carles Sanchez Jorge Bernal Debora Gil F. Javier Sanchez TI On-line lumen centre detection in gastrointestinal and respiratory endoscopy BT Second International Workshop Clinical Image-Based Procedures PY 2013 BP 31 EP 38 VL 8361 DI 10.1007/978-3-319-05666-1_5 DE Lumen centre detection; Bronchoscopy; Colonoscopy AB We present in this paper a novel lumen centre detection for gastrointestinal and respiratory endoscopic images. The proposed method is based on the appearance and geometry of the lumen, which we defined as the darkest image region which centre is a hub of image gradients. Experimental results validated on the first public annotated gastro-respiratory database prove the reliability of the method for a wide range of images (with precision over 95 %). ER