Reduction of capsule endoscopy reading times by unsupervised image mining.
The screening of the small intestine has become painless and easy with wireless capsule endoscopy (WCE) that is a revolutionary, relatively non-invasive imaging technique performed by a wireless swallowable endoscopic capsule transmitting thousands of video frames per examination. The average time required for the visual inspection of a full 8-h WCE video ranges from 45 to 120min, depending on the experience of the examiner. In this paper, we propose a novel approach to WCE reading time reduction by unsupervised mining of video frames. The proposed methodology is based on a data reduction algorithm which is applied according to a novel scheme for the extraction of representative video frames from a full length WCE video. It can be used either as a video summarization or as a video bookmarking tool, providing the comparative advantage of being general, unbounded by the finiteness of a training set. The number of frames extracted is controlled by a parameter that can be tuned automatically. Comprehensive experiments on real WCE videos indicate that a significant reduction in the reading times is feasible. In the case of the WCE videos used this reduction reached 85% without any loss of abnormalities.
Iakovidis
D K
DK
Department of Informatics and Computer Technology, Technological Educational Institute of Lamia, Greece. dimitris.iakovidis@ieee.org
Tsevas
S
S
Polydorou
A
A
D053705:Capsule Endoscopes; D007091:Image Processing, Computer-Assisted; D013686:Telemetry; D013997:Time Factors