Premium
A perceptually optimized mapping technique for display images
Author(s) -
Yang Cheng,
Chang Wenjing,
Li Jia
Publication year - 2016
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1002/jsid.501
Subject(s) - tone mapping , computer science , brightness , liquid crystal display , computer vision , distortion (music) , artificial intelligence , pixel , high dynamic range , contrast (vision) , energy (signal processing) , image quality , flicker , compensation (psychology) , display device , dynamic range , image (mathematics) , range (aeronautics) , computer graphics (images) , optics , mathematics , amplifier , materials science , psychology , computer network , statistics , physics , bandwidth (computing) , composite material , psychoanalysis , operating system
Liquid crystal displays (LCDs) are often viewed in the energy‐saving mode or under high ambient illumination. However, both these conditions compress the tonal dynamic range of the display device, resulting in undesirable visual perception effects. In this paper, we propose a local algorithm for improving the display image quality under either of these conditions. The proposed algorithm is based on a tone mapping technique, and it reproduces the image appearance to almost its original quality with a lower dynamic range. We also develop a more accurate definition of the image distortion, which takes into account the difference in pixel values to reduce the distortion significantly. By minimizing the differences in contrast and pixel intensity between the input and output images, the algorithm preserves the contrast while simultaneously providing brightness compensation. Simulation results show that the proposed algorithm can effectively maintain image quality while enabling power savings of 30%–50%.