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World J Gastroenterol. Nov 28, 2013; 19(44): 8028-8033
Published online Nov 28, 2013. doi: 10.3748/wjg.v19.i44.8028
Published online Nov 28, 2013. doi: 10.3748/wjg.v19.i44.8028
Evaluation of 4 three-dimensional representation algorithms in capsule endoscopy images
Alexandros Karargyris, National Library of Medicine, National Institutes of Health, Bethesda, MD 20892, United States
Emanuele Rondonotti, Giovanna Mandelli, Gastroenterology Unit, Ospedale Valduce, 22100 Como, Italy
Anastasios Koulaouzidis, Centre for Liver and Digestive Disorders, The Royal Infirmary of Edinburgh, Edinburgh EH16 4SA, Scotland, United Kingdom
Author contributions: Karargyris A and Koulaouzidis A conceived and developed the study design; Karargyris A developed the reviewer interface; Koulaouzidis A collected the capsule images; Rondonotti E, Mandelli G and Koulaouzidis A performed the reviews; Koulaouzidis A performed the statistics; Karargyris A, Rondonotti E and Koulaouzidis A drafted and critically reviewed the manuscript.
Correspondence to: Anastasios Koulaouzidis, MD, FEBG, FRSPH, FRCPE, Endoscopy Unit, Centre for Liver and Digestive Disorders, The Royal Infirmary of Edinburgh, 51 Little France Crescent, Old Dalkeith Road, Edinburgh EH16 4SA, Scotland, United Kingdom. akoulaouzidis@hotmail.com
Telephone: +44-131-2421126 Fax: +44-131-2421618
Received: July 3, 2013
Revised: September 20, 2013
Accepted: October 19, 2013
Published online: November 28, 2013
Processing time: 161 Days and 9.4 Hours
Revised: September 20, 2013
Accepted: October 19, 2013
Published online: November 28, 2013
Processing time: 161 Days and 9.4 Hours
Core Tip
Core tip: Accurate three-dimensional (3-D) reconstruction of the gastrointestinal tract requires the use of stereo-cameras that can simulate human binocular vision. In the absence of such technology in capsule endoscopy, we rely on software approaches [such as the Shape-from-Shading (SfS) algorithms] to obtain 3-D representation of digestive tract structures. In the present study, we evaluated the use of 4 publically available SfS in capsule endoscopy. 3 experienced/experts reviewers concluded that Tsai’s approach is the best of the four available algorithms.