Title :
A video-based speed estimation technique for localizing the wireless capsule endoscope inside gastrointestinal tract
Author :
Guanqun Bao ; Liang Mi ; Yishuang Geng ; Mingda Zhou ; Pahlavan, Kaveh
Author_Institution :
Center for Wireless Inf. Network Studies, Worcester Polytech. Inst., Worcester, MA, USA
Abstract :
Wireless Capsule Endoscopy (WCE) is progressively emerging as one of the most popular non-invasive imaging tools for gastrointestinal (GI) tract inspection. As a critical component of capsule endoscopic examination, physicians need to know the precise position of the endoscopic capsule in order to identify the position of intestinal disease. For the WCE, the position of the capsule is defined as the linear distance it is away from certain fixed anatomical landmarks. In order to measure the distance the capsule has traveled, a precise knowledge of how fast the capsule moves is urgently needed. In this paper, we present a novel computer vision based speed estimation technique that is able to extract the speed of the endoscopic capsule by analyzing the displacements between consecutive frames. The proposed approach is validated using a virtual testbed as well as the real endoscopic images. Results show that the proposed method is able to precisely estimate the speed of the endoscopic capsule with 93% accuracy on average, which enhances the localization accuracy of the WCE to less than 2.49 cm.
Keywords :
biomedical optical imaging; computer vision; diseases; endoscopes; feature extraction; medical image processing; object detection; video signal processing; GI; WCE; capsule endoscopic examination; capsule position; computer vision based speed estimation technique; consecutive frames; endoscopic capsule; fixed anatomical landmarks; gastrointestinal tract inspection; intestinal disease position; linear distance; localization accuracy; noninvasive imaging tools; precise position; real endoscopic images; speed extraction; video-based speed estimation technique; virtual testbed; wireless capsule endoscope localization; Accuracy; Cameras; Computer vision; Endoscopes; Estimation; Intestines; Wireless communication;
Conference_Titel :
Engineering in Medicine and Biology Society (EMBC), 2014 36th Annual International Conference of the IEEE
Conference_Location :
Chicago, IL
DOI :
10.1109/EMBC.2014.6944900