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Hand Region Tracking and Fingertip Detection based on Depth Image

깊이 영상 기반 손 영역 추적 및 손 끝점 검출

  • 주성일 (숭실대학교 글로벌미디어학과) ;
  • 원선희 (숭실대학교 글로벌미디어학과) ;
  • 최형일 (숭실대학교 글로벌미디어학과)
  • Received : 2013.07.30
  • Accepted : 2013.08.19
  • Published : 2013.08.30

Abstract

This paper proposes a method of tracking the hand region and detecting the fingertip using only depth images. In order to eliminate the influence of lighting conditions and obtain information quickly and stably, this paper proposes a tracking method that relies only on depth information, as well as a method of using region growing to identify errors that can occur during the tracking process and a method of detecting the fingertip that can be applied for the recognition of various gestures. First, the closest point of approach is identified through the process of transferring the center point in order to locate the tracking point, and the region is grown from that point to detect the hand region and boundary line. Next, the ratio of the invalid boundary, obtained by means of region growing, is used to calculate the validity of the tracking region and thereby judge whether the tracking is normal. If tracking is normal, the contour line is extracted from the detected hand region and the curvature and RANSAC and Convex-Hull are used to detect the fingertip. Lastly, quantitative and qualitative analyses are performed to verify the performance in various situations and prove the efficiency of the proposed algorithm for tracking and detecting the fingertip.

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