Content-based Image Retrieval using the Color and Wavelet-based Texture Feature

색상특징과 웨이블렛 기반의 질감특징을 이용한 영상 검색

  • 박종현 (전북대학교 전자정보공학부) ;
  • 박순영 (목포대학교 전자공학부) ;
  • 조완현 (전남대학교 통계학과) ;
  • 오일석 (전북대학교 전자정보공학부)
  • Published : 2003.04.01

Abstract

In this paper we propose an efficient content-based image retrieval method using the color and wavelet based texture features. The color features are obtained from soft-color histograms of the global image and the wavelet-based texture features are obtained from the invariant moments of the high-pass sub-band through the spatial-frequency analysis of the wavelet transform. The proposed system, called a color and texture based two-step retrieval(CTBTR), is composed of two-step query operations for an efficient image retrieval. In the first-step matching operation, the color histogram features are used to filter out the dissimilar images quickly from a large image database. The second-step matching operation applies the wavelet based texture features to the retained set of images to retrieve all relevant images successfully. The experimental results show that the proposed algorithm yields more improved retrieval accuracy with computationally efficiency than the previous methods.

본 논문에서는 색상과 웨이블렛 기반의 질감 특징들을 사용한 효율적인 내용기반 영상검색 방법을 제안하였다. 색상특징은 전체 영상으로부터 추출된 soft-히스토그램이 사용되며 질감 특징으로는 웨이블렛 변환의 공간 주파수 분석을 통하여 얻어진 고대역 부밴드로부터 추출된 불변 모우멘트가 이용된다. CTBTR이라 불리는 검색시스템은 질의 영상에 대한 효율적인 영상 검색을 위하여 두 단계의 유사성 정합을 수행하는데 첫 번째 정합 단계에서는 간단한 색상 히스토그램을 사용하여 질의 영상과 유사하지 않은 영상을 제거하여서 검색대상의 수를 줄이며, 두 번째 정합 단계에서는 첫 번째 단계에서 선별된 후보영상에 웨이블렛 기반의 질감특징을 적용하여 질의 영상과 유사한 영상을 검색한다. 실험결과 제안된 알고리즘이 기존의 방법보다 검색에 있어서 효율적인 계산처리와 정확한 검색을 수행하여 향상된 결과를 보여 주었다.

Keywords

References

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