A novel 3-D color histogram equalization method with uniform 1-D gray scale histogram

Ji Hee Han, Sejungd Yang, Byung Uk Lee

Research output: Contribution to journalArticlepeer-review

104 Scopus citations

Abstract

The majority of color histogram equalization methods do not yield uniform histogram in gray scale. After converting a color histogram equalized image into gray scale, the contrast of the converted image is worse than that of an 1-D gray scale histogram equalized image. We propose a novel 3-D color histogram equalization method that produces uniform distribution in gray scale histogram by defining a new cumulative probability density function in 3-D color space. Test results with natural and synthetic images are presented to compare and analyze various color histogram equalization algorithms based upon 3-D color histograms. We also present theoretical analysis for nonideal performance of existing methods.

Original languageEnglish
Article number5557812
Pages (from-to)506-512
Number of pages7
JournalIEEE Transactions on Image Processing
Volume20
Issue number2
DOIs
StatePublished - Feb 2011

Keywords

  • 3-D color histogram equalization
  • Color image enhancement
  • gray scale histogram equalization

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