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      • Department of Electrical and Electronics Engineering
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      Adaptive methods for dithering color images

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      Author(s)
      Akarun, L.
      Yardımcı, Y.
      Çetin, A. Enis
      Date
      1997-07
      Source Title
      IEEE Transactions on Image Processing
      Print ISSN
      1057-7149
      Publisher
      Institute of Electrical and Electronics Engineers
      Volume
      6
      Issue
      7
      Pages
      950 - 955
      Language
      English
      Type
      Article
      Item Usage Stats
      141
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      146
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      Abstract
      Most color image printing and display devices do not have the capability of reproducing true color images. A common remedy is the use of dithering techniques that take advantage of the lower sensitivity of the eye to spatial resolution and exchange higher color resolution with lower spatial resolution. In this paper, an adaptive error diffusion method for color images is presented. The error diffusion filter coefficients are updated by a normalized least mean square-type (LMS-type) algorithm to prevent textural contours, color impulses, and color shifts, which are among the most common side effects of the standard dithering algorithms. Another novelty of the new method is its vector character: Previous applications of error diffusion have treated the individual color components of an image separately. Here, we develop a general vector approach and demonstrate through simulation studies that superior results are achieved.
      Keywords
      Adaptive algorithms
      Adaptive filtering
      Color printing
      Computer simulation
      Image quality
      Least squares approximations
      Optical resolving power
      Vectors
      Color impulses
      Color shifts
      Textural contours
      Vector error diffusion
      Color image processing
      Permalink
      http://hdl.handle.net/11693/25563
      Published Version (Please cite this version)
      http://dx.doi.org/10.1109/83.597270
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      • Department of Electrical and Electronics Engineering 3702
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