Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Improving the Quality of Color Colonoscopy Videos | Hindawi Publishing Corporation EURASIP Journal on Image and Video Processing Volume 2008 Article ID 139429 7 pages doi 2008 139429 Research Article Improving the Quality of Color Colonoscopy Videos Rozenn Dahyot Fernando Vilarino and Gerard Lacey Department of Computer Science School of Computer Science and Statistics Trinity College Dublin College Green Dublin 2 Ireland Correspondence should be addressed to Rozenn Dahyot Received 1 August 2007 Revised 20 November 2007 Accepted 22 January 2008 Recommended by Shoji Tominaga Colonoscopy is currently one of the best methods to detect colorectal cancer. Nowadays one of the widely used colonoscopes has a monochrome chipset recording successively at 60 Hz R G and B components merged into one color video stream. Misalignments of the channels occur each time the camera moves and this artefact impedes both online visual inspection by doctors and offline computer analysis of the image data. We propose to restore this artefact by first equalizing the color channels and then performing a robust camera motion estimation and compensation. Copyright 2008 Rozenn Dahyot et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION Colorectal cancer is the second leading cause of cancer death in the United States and colonoscopy by removing polyps early is currently one of the best methods to reduce this fatality 1 . Colonoscopy is a minimally invasive endoscopic examination of the colon and the distal part of the small bowel with a fiber optic camera on a flexible tube. The video is inspected in realtime by the doctors to give a visual diagnosis . ulceration polyps . This procedure also gives the opportunity for biopsy of suspected lesions. The quality of endoscopic screening is of significant concern in the medical community. .
