Contrast Enhancement using Dynamic Range Separate Histogram Equalization

동적영역 분할을 이용한 명암비 향상기법

  • 강현우 (한양대학교 전자전기제어계측공학과) ;
  • 박규희 (한양대학교 전자전기제어계측공학과) ;
  • 황보현 (한양대학교 전자전기제어계측공학과) ;
  • 윤종호 (한양대학교 전자전기제어계측공학과) ;
  • 최명렬 (한양대학교 전자전기제어계측공학과)
  • Published : 2008.06.18

Abstract

Histogram Equalization (HE) method is widely used for contrast enhancement. However, HE often introduce washed out appearance or color distortion due to the over enhancement in contrast. In this paper, Dynamic Range Separate Histogram Equalization (DRSHE) is proposed for contrast enhancement. DRSHE reconfigures the dynamic range of histogram using probability distribution ratio. The experimental results show that DRSHE suppresses the washed out appearance or color distortion and preserves naturalness of the original image compared with conventional methods.

Keywords