Gradient domain salience-preserving color-to-gray conversion

  • Authors:
  • Bingfeng Zhou;Jie Feng

  • Affiliations:
  • Peking University;Peking University

  • Venue:
  • SIGGRAPH Asia 2012 Technical Briefs
  • Year:
  • 2012

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Abstract

In this paper an algorithm for gradient domain color-to-gray conversion is described. By enhancing the luminance gradient with the chromatic difference in CIELAB space, a gradient field is created to construct the resulting gray-scale image using a Poisson equation solver. In our algorithm, we develop a modulated luminance gradient enhancement to produce artifact-free and salience-preserving grayscale images. A gradient sign control function is defined for isoluminance color images to keep the correct color ordering.