Department of Computer Science and Technology

Technical reports

The decolorize algorithm for contrast enhancing, color to grayscale conversion

Mark Grundland, Neil A. Dodgson

October 2005, 15 pages

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DOI: 10.48456/tr-649


We present a new contrast enhancing color to grayscale conversion algorithm which works in real-time. It incorporates novel techniques for image sampling and dimensionality reduction, sampling color differences by Gaussian pairing and analyzing color differences by predominant component analysis. In addition to its speed and simplicity, the algorithm has the advantages of continuous mapping, global consistency, and grayscale preservation, as well as predictable luminance, saturation, and hue ordering properties. We give an extensive range of examples and compare our method with other recently published algorithms.

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BibTeX record

  author =	 {Grundland, Mark and Dodgson, Neil A.},
  title = 	 {{The decolorize algorithm for contrast enhancing, color to
         	   grayscale conversion}},
  year = 	 2005,
  month = 	 oct,
  url = 	 {},
  institution =  {University of Cambridge, Computer Laboratory},
  doi = 	 {10.48456/tr-649},
  number = 	 {UCAM-CL-TR-649}