전자공학회논문지 (Journal of the Institute of Electronics and Information Engineers)

  • 제51권5호
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  • Pages.137-151
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  • 2014
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  • 2287-5026(pISSN)
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  • 2288-159X(eISSN)
대한전자공학회 (The Institute of Electronics and Information Engineers)
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시각 주의와 영상 분할을 이용한 관심 객체 자동 검출 기법

Automatic Detection of Objects-of-Interest using Visual Attention and Image Segmentation

  • 신도경 (한양대학교 컴퓨터공학과) ;
  • 문영식 (한양대학교 컴퓨터공학과)
  • Shi, Do Kyung (Dept. of Computer Science and Engineering, Hanyang University) ;
  • Moon, Young Shik (Dept. of Computer Science and Engineering, Hanyang University)
  • 투고 : 2013.12.10
  • 심사 : 2014.04.29
  • 발행 : 2014.05.25
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초록

본 논문에서는 일반적인 자연 영상에서 관심 객체를 자동으로 검출하기 위한 방법을 제안한다. 영상에서의 관심 객체는 사람에 따라서 주관적으로 판단되며, 일반적으로 사람의 시각은 관심 객체에 초점이 맞춰지게 된다. 관심 객체의 자동 검출을 위한 첫 번째 단계로서 사람의 시각 인지기반의 돌출 맵을 이용하여 관심 객체의 후보 영역을 검출한다. 검출된 후보영역은 객체에 대한 대략적인 위치 정보를 가지고 있지만 관심 객체를 정확하게 분할하지 못하는 문제점이 존재한다. 따라서 두 번째 단계에서 영상의 색상과 에지를 고려한 그래프 기반의 영상 분할 기법과 객체 영역의 세선화(skeletonization)를 결합함으로써 정확한 객체 영역을 자동으로 검출한다. 본 논문에서는 제안하는 방법과 기존 방법들의 성능을 비교하기 위해서 정확률(precision), 재현율(recall) 그리고 정밀도(accuracy)를 계산하였다. 그 결과, 제안하는 방법은 미 검출(under detection) 및 과검출(over detection)에 대한 문제점을 줄임으로써 기존 방법보다 더 향상된 결과를 보인다.

This paper proposes a method of detecting object of interest(OOI) in general natural images. OOI is subjectively estimated by human in images. The vision of human, in general, might focus on OOI. As the first step for automatic detection of OOI, candidate regions of OOI are detected by using a saliency map based on the human visual perception. A saliency map locates an approximate OOI, but there is a problem that they are not accurately segmented. In order to address this problem, in the second step, an exact object region is automatically detected by combining graph-based image segmentation and skeletonization. In this paper, we calculate the precision, recall and accuracy to compare the performance of the proposed method to existing methods. In experimental results, the proposed method has achieved better performance than existing methods by reducing the problems such as under detection and over detection.

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