Image contrast enhancement based on local brightness and contouring artifact improvement for large-scale LCD TVs

Jong Hee Hwang, Jean Y. Song, Yoon Sik Choe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Generally, the global histogram equalization of contrast enhancement methods was used in various application fields because of its simple and effective function. But, as it has a disadvantage that the brightness of an image is changed excessively, in spite of heavy computational complexity, overlapped sub-block histogram equalization method reflecting local histogram properties is used mainly. Also, the global and local histogram equalization methods increase excessively the contrast of simple background occupying wide scope, and they causes the false contour which is unpleasant to the perception operation of an observer. So, in order to improve the local brightness, this paper derived the local histogram equalization (LHE) with the minimal overlapped block size that is optimized for Full High Definition (FHD: 1920×1080) representing the standard image size of large-size LCD (Liquid Crystal Display) TV and can be applied without causing the blocking artifacts, and then it proposed the image contrast enhancement method that combines the modified error diffusion (ED) method in order to reduce the contouring artifacts. This experimental results show that the proposed contrast enhancement method preserves the local image brightness and suppresses the contouring artifacts.

Original languageEnglish
Title of host publicationRecent Researches in Circuits, Systems, Electronics, Control and Signal Processing - 9th WSEAS International Conference on Circuits, Systems, Electronics, Control and Signal Processing, CSECS'10
Pages154-159
Number of pages6
Publication statusPublished - 2010
Event9th WSEAS International Conference on Circuits, Systems, Electronics, Control and Signal Processing, CSECS'10 - Vouliagmeni, Athens, Greece
Duration: 2010 Dec 292010 Dec 31

Publication series

NameInternational conference on Circuits, Systems, Electronics, Control and Signal Processing - Proceedings

Other

Other9th WSEAS International Conference on Circuits, Systems, Electronics, Control and Signal Processing, CSECS'10
CountryGreece
CityVouliagmeni, Athens
Period10/12/2910/12/31

All Science Journal Classification (ASJC) codes

  • Hardware and Architecture
  • Signal Processing
  • Electrical and Electronic Engineering

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  • Cite this

    Hwang, J. H., Song, J. Y., & Choe, Y. S. (2010). Image contrast enhancement based on local brightness and contouring artifact improvement for large-scale LCD TVs. In Recent Researches in Circuits, Systems, Electronics, Control and Signal Processing - 9th WSEAS International Conference on Circuits, Systems, Electronics, Control and Signal Processing, CSECS'10 (pp. 154-159). (International conference on Circuits, Systems, Electronics, Control and Signal Processing - Proceedings).