Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Effective Detection of Target Region Using a Machine Learning Algorithm

기계 학습 알고리즘을 이용한 효과적인 대상 영역 분할

  • 장석우 (안양대학교 소프트웨어학과) ;
  • 이경주 (숭실대학교 컴퓨터학과) ;
  • 정명희 (안양대학교 소프트웨어학과)
  • Received : 2018.04.26
  • Accepted : 2018.05.04
  • Published : 2018.05.31
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Abstract

Since the face in image content corresponds to individual information that can distinguish a specific person from other people, it is important to accurately detect faces not hidden in an image. In this paper, we propose a method to accurately detect a face from input images using a deep learning algorithm, which is one of the machine learning methods. In the proposed method, image input via the red-green-blue (RGB) color model is first changed to the luminance-chroma: blue-chroma: red-chroma ($YC_bC_r$) color model; then, other regions are removed using the learned skin color model, and only the skin regions are segmented. A CNN model-based deep learning algorithm is then applied to robustly detect only the face region from the input image. Experimental results show that the proposed method more efficiently segments facial regions from input images. The proposed face area-detection method is expected to be useful in practical applications related to multimedia and shape recognition.

다양한 종류의 컬러 영상 콘텐츠에 포함되어 있는 사람의 얼굴 영역은 다른 사람들과 특정인을 구별해 줄 수 있는 개인의 정보에 해당하므로, 입력된 컬러 영상으로부터 가려지지 않은 사람의 얼굴 영역들을 정확하게 검출하는 작업은 매우 중요하다. 본 논문에서는 입력되는 컬러 영상으로부터 기계 학습 알고리즘 중의 하나인 딥러닝 알고리즘을 이용하여 사람의 얼굴 영역을 정확하게 검출하는 방법을 제안한다. 본 논문에서 제안된 방법에서는 먼저 RGB 색상 모델로 입력되는 영상을 $YC_bC_r$ 색상 모델로 변경한 다음, 기 학습된 타원형의 피부 색상 분포 모델을 활용하여 다른 영역들은 제거하고 사람의 피부 영역만을 먼저 분할한다. 그런 다음, CNN 모델 기반의 딥러닝 알고리즘을 적용하여 이전 단계에서 검출된 피부 영역 내에서 사람의 얼굴 영역을 강인하게 검출한다. 실험 결과에서는 제안된 방법이 입력되는 다양한 컬러 영상으로부터 사람의 얼굴 영역들을 기존의 방법에 비해 보다 효율적으로 분할한다는 것을 보여준다. 본 논문에서 제안된 얼굴 영역 검출 방법은 영상 보안, 물체 인식 및 추적, 얼굴 인식 등과 같은 멀티미디어 및 형태 인식과 관련된 실제적인 응용 분야에서 매우 유용하게 활용될 것으로 기대된다.

Keywords

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