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Bilinear weighting and threshold scheme for low-power two-dimensional local dimming liquid crystal displays without block artifacts

机译：无块伪影的低功率二维局部调光液晶显示器的双线性加权和阈值方案

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摘要

A two-dimensional (2-D) weighted roll-off local dimming algorithm that eliminates any visible block artifacts caused by the spatial mismatch between a discontinuous panel image and a continuous backlight is described. The proposed scheme enhances the high gray details by means of a roll-off scheme and removes the block artifacts with bilinear weighting of a pixel-compensated panel image. In addition, the threshold scheme is used to resolve overcompensation problems that lead to visible artifacts around the boundaries of dark local blocks. The image quality and the power consumption are evaluated for 40 test images through both simulation and measurement. Compared to 15.56 and 1.45 of a 2-D roll-off method, the maximum and average color difference values of a proposed scheme are reduced to 7.76 and 0.72 in the simulation. For a prototype 40-in. light emitting diode TV, the average power saving over 40 test images is measured as 60.96%.
机译：描述了一种二维（2-D）加权滚降局部调光算法，该算法消除了由不连续面板图像和连续背光之间的空间失配引起的任何可见块伪影。所提出的方案通过滚降方案增强了高灰度细节，并且通过像素补偿的面板图像的双线性加权来去除块伪影。另外，阈值方案用于解决过度补偿问题，该问题导致在黑暗局部块的边界周围出现可见的伪像。通过仿真和测量，评估了40张测试图像的图像质量和功耗。与2-D滚降方法的15.56和1.45相比，在仿真中，所提方案的最大和平均色差值减小为7.76和0.72。对于40英寸原型。发光二极管电视测得的40幅测试图像的平均节电率为60.96％。

著录项

  • 来源
    《Optical engineering》 |2014年第6期|063110.1-063110.12|共12页
  • 作者

    Seul-Ki Kim; Seok-Jeong Song; Hyoungsik Nam;

  • 作者单位

    Kyung Hee University, Advanced Display Research Center, Department of Information Display, Seoul 130-701, Republic of Korea;

    Kyung Hee University, Advanced Display Research Center, Department of Information Display, Seoul 130-701, Republic of Korea;

    Kyung Hee University, Advanced Display Research Center, Department of Information Display, Seoul 130-701, Republic of Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    two-dimensional local dimming; bilinear weighting; threshold; block artifact; overcompensation;

    机译：二维局部调光双线性加权;阈;块伪像过度补偿;

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