Region-based Content Retrieval Algorithm Using Image Segmentation

영상 분할을 이용한 영역기반 내용 검색 알고리즘

  • 이강현 (조선대학교 전자공학과)
  • Published : 2007.09.25

Abstract

As the availability of an image information has been significantly increasing, necessity of system that can manage an image information is increasing. Accordingly, we proposed the region-based content retrieval(CBIR) algorithm based on an efficient combination of an image segmentation, an image texture, a color feature and an image's shape and position information. As a color feature, a HSI color histogram is chosen which is known to measure spatial of colors well. We used active contour and CWT(complex wavelet transform) to perform an image segmentation and extracting an image texture. And shape and position information are obtained using Hu invariant moments in the luminance of HSI model. For efficient similarity computation, the extracted features(color histogram, Hu invariant moments, and complex wavelet transform) are combined and then precision and recall are measured. As a experimental result using DB that was supported by www.freefoto.com. the proposed image retrieval engine have 94.8% precision, 82.7% recall and can apply successfully image retrieval system.

영상 정보의 이용이 증가함에 따라 영상을 효율적으로 관리할 수 있는 시스템의 필요성이 증가하고 있다. 이에 따라, 본 논문에서는 영상 분할 알고리즘, 색상 특성, 질감, 그리고 영상의 형태와 위치 정보의 효율적인 결합에 근거한 영역기반 내용 검색 알고리즘을 제안한다. 색상 특징으로는 색상의 공간적인 상관관계를 잘 나타내는 HSI 색상 히스토그램을 선택하였고, 영상의 분할과 질감특성은 각각 Active control와 CWT(Complex wavelet transform)를 사용하였다. 그리고 형태와 위치 특징들은 HSI의 휘도 성분에서 불변 모멘트를 이용하여 추출하였다. 효율적인 유사도 측정을 위해 추출된 특징(색상 히스토그램, Hu 불변 모멘트, CWT)을 결합하여 정확도와 재현율을 측정하였다. www. freefoto.com에서 제공하는 DB를 사용하여 실험한 결과, 제안된 검색엔진은 94.8%의 정확도와 82.7%의 재현율을 가지며 성공적으로 영상 검색 시스템에 응용할 수 있다.

Keywords

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