Subjective quality of video sequences rendered on LCD with local backlight dimming at different lighting conditions

Claire Mantel, Jari Korhonen, Jesper Mørkhøj Pedersen, Søren Bech, Jakob Dahl Andersen, Søren Forchhammer

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    This paper focuses on the influence of ambient light on the perceived quality of videos displayed on Liquid Crystal Display (LCD) with local backlight dimming. A subjective test assessing the quality of videos with two backlight dimming methods and three lighting conditions, i.e. no light, low light level (5 lux) and higher light level (60 lux) was organized to collect subjective data. Results show that participants prefer the method exploiting local dimming possibilities to the conventional full backlight but that this preference varies depending on the ambient light level. The clear preference for one method at the low light conditions decreases at the high ambient light, confirming that the ambient light significantly attenuates the perception of the leakage defect (light leaking through dark pixels). Results are also highly dependent on the content of the sequence, which can modulate the effect of the ambient light from having an important influence on the quality grades to no influence at all.
    Original languageEnglish
    Title of host publicationProceedings of the SPIE
    Number of pages8
    PublisherSPIE - International Society for Optical Engineering
    Publication date2015
    Article number93960S
    Publication statusPublished - 2015
    EventImage Quality and System Performance XII - Hilton San Francisco, Union Square, San Francisco, California, United States
    Duration: 8 Feb 201512 Feb 2015


    ConferenceImage Quality and System Performance XII
    LocationHilton San Francisco, Union Square
    Country/TerritoryUnited States
    CitySan Francisco, California
    SeriesProceedings of SPIE - The International Society for Optical Engineering

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    Copyright 2015 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.


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