摘要
LED背光技术不仅显著增强了LCD显示的动态范围,同时使现有图像达到了更逼真的显示效果。通过对LED单独控制,可为显示提供区域可控的LED背光。然而,LED之间的干扰在这里不仅仅为我们提供了较高的亮度,同时也是产生潜在虚假图像的原因,这使得导出最佳LED驱动信号成为一项具有挑战性的工作。本文通过两个数学模型:迭代解旋法和线性优化法,计算分析了上述问题。并给出了这两个数学模型的算法,同时建立了一个包含161个高动态范围图像的图像数据库,对上述两种方法的效果进行了评估。
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.
出处
《现代显示》
2007年第11期24-29,共6页
Advanced Display
关键词
LED背光技术
驱动信号
高动态范围
LED backlight technique
driving signal
high dynamic range
