Modeling the subjective quality of highly contrasted videos displayed on LCD with local backlight dimming

Claire Mantel, Soren Bech, Jari Korhonen, Soren Forchhammer, Jesper Melgaard Pedersen

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Local backlight dimming is a technology aiming at both saving energy and improving visual quality on television sets. As the rendition of the image is specified locally, the numerical signal corresponding to the displayed image needs to be computed through a model of the display. This simulated signal can then be used as input to objective quality metrics. The focus of this paper is on determining which characteristics of locally backlit displays influence quality assessment. A subjective experiment assessing the quality of highly contrasted videos displayed with various local backlight-dimming algorithms is set up. Subjective results are then compared with both objective measures and objective quality metrics using different display models. The first analysis indicates that the most significant objective features are temporal variations, power consumption (probably representing leakage), and a contrast measure. The second analysis shows that modeling of leakage is necessary for objective quality assessment of sequences displayed with local backlight dimming.

Original languageEnglish
Article number6991556
Pages (from-to)573-582
Number of pages10
JournalIEEE Transactions on Image Processing
Issue number2
Publication statusPublished - 1 Feb 2015

Bibliographical note

Publisher Copyright:
© 2015 IEEE.


  • Backlight dimming
  • Contrast
  • Displayed image quality
  • LED backlight
  • Light leakage
  • Liquid crystal display (LCD)
  • Video quality


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