Grey conversion via perceived-contrast

  • Authors:
  • Wei Zhu;Ruizhen Hu;Ligang Liu

  • Affiliations:
  • Department of Mathematics, Zhejiang University, Hangzhou, China 310027;Department of Mathematics, Zhejiang University, Hangzhou, China 310027;School of Mathematical Sciences, University of Science and Technology of China, Anhui, China 230026

  • Venue:
  • The Visual Computer: International Journal of Computer Graphics
  • Year:
  • 2014

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Abstract

This paper presents a new color-to-gray conversion algorithm capturing the perceived appearance of color images. Based on the Filter Theory, we formulate a novel measurement of channel-level distinction, called Channel Salience, to depict the filter level of three color stimuli. This salience metric guides a contrast adjustment process to enhance the perceived grayscale in the final output with a two-steps conversion. Experimental results show that our algorithm produces pleasing results for a variety of color images and we further extend the Channel Salience to edge detection.