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66.1: Distinguished Student Paper : Deriving LED Driving Signal for Area‐Adaptive LED Backlight in High Dynamic Range LCD Displays
Author(s) -
Li Feng,
Feng Xiaofan,
Sezan Ibrahim,
Daly Scott
Publication year - 2007
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.2785682
Subject(s) - backlight , liquid crystal display , high dynamic range , computer science , brightness , dynamic range , computer vision , artificial intelligence , computer graphics (images) , optics , physics , operating system
LED backlight technique dramatically enhances the dynamic range of an LCD display and hence extends its ability to present images with high reality. This is achieved by modulating LEDs individually, thus providing an area‐adaptive backlight for the display. However, crosstalk of LEDs is not only a blessing for supplying high brightness but is also a curse for causing potential artifacts, making the derivation of LED driving signal a challenging task. This paper formulates the problem in two mathematical models: an iterative de‐convolution approach and a linear optimization approach. Algorithms for solving these two models are provided. An image database composed of 161 high dynamic range images is built to evaluate the performances of these two approaches.