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

The Institute of Electronics and Information Engineers (대한전자공학회)
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Saliency Detection Using Entropy Weight and Weber's Law

엔트로피 가중치와 웨버 법칙을 이용한 세일리언시 검출

  • Lee, Ho Sang (Dept. Electronics Eng., Pusan National University) ;
  • Moon, Sang Whan (Dept. Electronics Eng., Pusan National University) ;
  • Eom, Il Kyu (Dept. Electronics Eng., Pusan National University)
  • Received : 2016.05.04
  • Accepted : 2016.12.30
  • Published : 2017.01.25
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Abstract

In this paper, we present a saliency detection method using entropy weight and Weber contrast in the wavelet transform domain. Our method is based on the commonly exploited conventional algorithms that are composed of the local bottom-up approach and global top-down approach. First, we perform the multi-level wavelet transform for the CIE Lab color images, and obtain global saliency by adding the local Weber contrasts to the corresponding low-frequency wavelet coefficients. Next, the local saliency is obtained by applying Gaussian filter that is weighted by entropy of wavelet high-frequency subband. The final saliency map is detected by non-lineally combining the local and global saliencies. To evaluate the proposed saliency detection method, we perform computer simulations for two image databases. Simulations results show the proposed method represents superior performance to the conventional algorithms.

본 논문에서는 웨이블릿 변환 영역에서 엔트로피 가중치와 웨버 대비 도를 이용한 세일리언시 검출 방법을 제안한다. 본 논문의 방법은 기존의 일반적인 방법과 마찬가지로 국부적인 세일리언시를 결정하는 상향식 검출과 전역적인 세일리언시를 구성하는 하향식 검출을 결합하는 구조를 가진다. 먼저, CIE Lab 컬러 영상에 대하여 웨이블릿 변환을 수행하고, 저주파 부밴드에 대하여 웨버 대비도 계산하고 이를 저주파 계수에 부가하여 전역 세일리언시를 구한다. 다음으로, 고주파 부밴드의 엔트로피를 이용한 가중치를 가우시안 필터에 적용하여 국부 세일리언시를 구한다. 마지막으로 국부 세일리언시와 전역 세일리언시의 비선형 결합을 통하여 최종 세일리언시를 검출한다. 제안 방법의 성능 평가를 위해 2개의 영상 데이터베이스에 대하여 모의실험을 수행하였다. 기존의 방법과 비교하여 본 논문의 방법은 우수한 세일리언시 검출 결과를 나타내었다.

Keywords

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