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

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

doi:10.1117/12.2044236

25 February 2014 Modeling the leakage of LCD displays with local backlight for quality assessment

Claire Mantel, Jari Korhonen, Jesper Melgaard Pedersen, Søren Bech, Ehsan Nadernejad, Nino Burini, Søren Forchhammer

Proceedings Volume 9014, Human Vision and Electronic Imaging XIX; 90140M (2014) https://doi.org/10.1117/12.2044236
Event: IS&T/SPIE Electronic Imaging, 2014, San Francisco, California, United States

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.

Citation Download Citation

Claire Mantel, Jari Korhonen, Jesper Melgaard Pedersen, Søren Bech, Ehsan Nadernejad, Nino Burini, and Søren Forchhammer "Modeling the leakage of LCD displays with local backlight for quality assessment", Proc. SPIE 9014, Human Vision and Electronic Imaging XIX, 90140M (25 February 2014); https://doi.org/10.1117/12.2044236

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available