Adaptive Control of Video Display for Diagnostic Assistance by Analysis of Capsule Endoscopic Images

In this paper, we present a method for reducing diagnostic time by adaptively controlling the frame rate in a capsule endoscopic image sequence. The video sequence, which was capture over 8 hours, requires from 45 minutes to two hours of extreme concentration by examining doctors to make diagnosis. Effectiveness of the method is that the sequence can be played at high speed in stable regions to save time and then decreased at rough changes that can then help ascertain suspicious findings more conveniently. To realize such a system, the capturing conditions are classified into groups corresponding to the changing states between two frames. The delay time of these frames was calculated by the parametric functions. The optimal parameter set was determined from evaluations by medical doctors. We concluded that the average diagnostic time could be reduced from 8 hours down to about 30 minutes