Modeling the leakage of LCD displays with local backlight for quality assessment

Claire Mantel; Jari Korhonen; Jesper M. Pedersen; Søren Bech; Ehsan Nadernejad; Nino Burini; Søren Forchhammer

doi:10.1117/12.2044236

Modeling the leakage of LCD displays with local backlight for quality assessment

Claire Mantel^*, Jari Korhonen, Jesper M. Pedersen, Søren Bech, Ehsan Nadernejad, Nino Burini, Søren Forchhammer

^*Corresponding author for this work

Computing Science

Research output: Chapter in Book/Report/Conference proceeding › Published conference contribution

3 Citations (Scopus)

Abstract

The recent technique of local backlight dimming has a significant impact on the quality of images displayed with a LCD screen with LED local dimming. Therefore it represents a necessary step in the quality assessment chain, independently from the other processes applied to images. This paper investigates the modeling of one of the major spatial artifacts produced by local dimming: leakage. Leakage appears in dark areas when the backlight level is too high for LC cells to block sufficiently and the final displayed brightness is higher than it should. A subjective quality experiment was run on videos displayed on LCD TV with local backlight dimming viewed from a 0° and 15° angles. The subjective results are then compared objective data using different leakage models: constant over the whole display or horizontally varying and three leakage factor (no leakage, measured at 0° and 15° respectively). Results show that for dark sequences accounting for the leakage artifact in the display model is definitely an improvement. Approximating that leakage is constant over the screen seems valid when viewing from a 15° angle while using a horizontally varying model might prove useful for 0° viewing..

Original language	English
Title of host publication	Proceedings: Human Vision and Electronic Imaging XIX
Publisher	SPIE
Volume	9014
ISBN (Print)	9780819499318
DOIs	https://doi.org/10.1117/12.2044236
Publication status	Published - 25 Feb 2014
Event	IS&T/SPIE Electronic Imaging: Human Vision and Electronic Imaging XIX - San Francisco, CA, United States Duration: 3 Feb 2014 → 6 Feb 2014

Conference

Conference	IS&T/SPIE Electronic Imaging: Human Vision and Electronic Imaging XIX
Country/Territory	United States
City	San Francisco, CA
Period	3/02/14 → 6/02/14

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10.1117/12.2044236

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Mantel, C, Korhonen, J, Pedersen, JM, Bech, S, Nadernejad, E, Burini, N & Forchhammer, S 2014, Modeling the leakage of LCD displays with local backlight for quality assessment. in Proceedings: Human Vision and Electronic Imaging XIX. vol. 9014, 90140M, SPIE, IS&T/SPIE Electronic Imaging: Human Vision and Electronic Imaging XIX, San Francisco, CA, United States, 3/02/14. https://doi.org/10.1117/12.2044236

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title = "Modeling the leakage of LCD displays with local backlight for quality assessment",

abstract = "The recent technique of local backlight dimming has a significant impact on the quality of images displayed with a LCD screen with LED local dimming. Therefore it represents a necessary step in the quality assessment chain, independently from the other processes applied to images. This paper investigates the modeling of one of the major spatial artifacts produced by local dimming: leakage. Leakage appears in dark areas when the backlight level is too high for LC cells to block sufficiently and the final displayed brightness is higher than it should. A subjective quality experiment was run on videos displayed on LCD TV with local backlight dimming viewed from a 0° and 15° angles. The subjective results are then compared objective data using different leakage models: constant over the whole display or horizontally varying and three leakage factor (no leakage, measured at 0° and 15° respectively). Results show that for dark sequences accounting for the leakage artifact in the display model is definitely an improvement. Approximating that leakage is constant over the screen seems valid when viewing from a 15° angle while using a horizontally varying model might prove useful for 0° viewing..",

author = "Claire Mantel and Jari Korhonen and Pedersen, {Jesper M.} and S{\o}ren Bech and Ehsan Nadernejad and Nino Burini and S{\o}ren Forchhammer",

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T1 - Modeling the leakage of LCD displays with local backlight for quality assessment

AU - Mantel, Claire

AU - Korhonen, Jari

AU - Pedersen, Jesper M.

AU - Bech, Søren

AU - Nadernejad, Ehsan

AU - Burini, Nino

AU - Forchhammer, Søren

PY - 2014/2/25

Y1 - 2014/2/25

N2 - The recent technique of local backlight dimming has a significant impact on the quality of images displayed with a LCD screen with LED local dimming. Therefore it represents a necessary step in the quality assessment chain, independently from the other processes applied to images. This paper investigates the modeling of one of the major spatial artifacts produced by local dimming: leakage. Leakage appears in dark areas when the backlight level is too high for LC cells to block sufficiently and the final displayed brightness is higher than it should. A subjective quality experiment was run on videos displayed on LCD TV with local backlight dimming viewed from a 0° and 15° angles. The subjective results are then compared objective data using different leakage models: constant over the whole display or horizontally varying and three leakage factor (no leakage, measured at 0° and 15° respectively). Results show that for dark sequences accounting for the leakage artifact in the display model is definitely an improvement. Approximating that leakage is constant over the screen seems valid when viewing from a 15° angle while using a horizontally varying model might prove useful for 0° viewing..

AB - The recent technique of local backlight dimming has a significant impact on the quality of images displayed with a LCD screen with LED local dimming. Therefore it represents a necessary step in the quality assessment chain, independently from the other processes applied to images. This paper investigates the modeling of one of the major spatial artifacts produced by local dimming: leakage. Leakage appears in dark areas when the backlight level is too high for LC cells to block sufficiently and the final displayed brightness is higher than it should. A subjective quality experiment was run on videos displayed on LCD TV with local backlight dimming viewed from a 0° and 15° angles. The subjective results are then compared objective data using different leakage models: constant over the whole display or horizontally varying and three leakage factor (no leakage, measured at 0° and 15° respectively). Results show that for dark sequences accounting for the leakage artifact in the display model is definitely an improvement. Approximating that leakage is constant over the screen seems valid when viewing from a 15° angle while using a horizontally varying model might prove useful for 0° viewing..

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M3 - Published conference contribution

AN - SCOPUS:84897563513

SN - 9780819499318

VL - 9014

BT - Proceedings: Human Vision and Electronic Imaging XIX

PB - SPIE

T2 - IS&T/SPIE Electronic Imaging: Human Vision and Electronic Imaging XIX

Y2 - 3 February 2014 through 6 February 2014

ER -

Modeling the leakage of LCD displays with local backlight for quality assessment

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