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Summary: Lumen detection for capsule endoscopy
Xenophon Zabulis, Antonis A. Argyros and Dimitris P. Tsakiris
Abstract-- In this paper, two visual cues are proposed, to
be exploited for the navigation of active endoscopic capsules
within the gastrointestinal (GI) tract. These cues consist of the
detection and tracking of the lumen and of an illumination
highlight in capsule endoscopy (CE) images. The proposed
approach aims at developing vision algorithms which are robust
with respect to the challenging imaging conditions encountered
in the GI tract and the great variability of the acquired
images. Cases where no or more than one lumens exists, are
also detected. The proposed approach extends the state-of-the-
art in lumen detection, and is demonstrated for in-vivo video
sequences acquired from endoscopic capsules.
I. INTRODUCTION
Capsule endoscopy (CE) [1], [2] is a diagnostic proce-
dure, in which a pill-sized capsule acquires images of the
gastrointestinal (GI) tract, utilizing a microcamera mounted
on one of its tips (see Fig. 1). The duration of this diagnostic
procedure may range from 6 to 18 hours, because the
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