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首页> 外文期刊>Journal of Imaging Science and Technology >Illumination-Level Adaptive Color Reproduction Method with Lightness Adaptation and Flare Compensation for Mobile Display
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Illumination-Level Adaptive Color Reproduction Method with Lightness Adaptation and Flare Compensation for Mobile Display

机译：具有亮度适应和眩光补偿的移动显示照明级自适应色彩再现方法

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摘要

Mobile displays such as personal digital assistants and cellular phones encounter various illumination levels, different from the flat panel displays mainly used in indoor environment. In particular, in the daylight condition, the displayed images or text on a mobile display can be darkly perceived, which results in the degradation of sun readability in a mobile display. To overcome this problem, we proposed an illumination level adaptive color reproduction method with a lightness adaptation model and flare compensation. Lightness adaptation is a physiological mechanism to shift the pho-toreceptor response curve according to the illumination level. Thus, as a mobile phone is carried from an indoor to outdoor environment, the photoreceptor response curve automatically shifts toward a higher luminance to adapt to daylight intensity. Consequently, for a lower intensity emitted from the mobile display, the photoreceptor response curve becomes less sensitive, thereby decreasing the perceived brightness of the displayed image. Moreover, colors produced by mobile display can also be influenced by the flare, defined as ambient light reflected from the display panel, which reduces the maximum chroma of the mobile display gamut. Based on these physiological and physical phenomena, the lightness values of the input image are enhanced by making a linear relation between input luminance value estimated by device characterization and photoreceptor response value calculated from the lightness adaptation model. For the chroma component of the lightness-enhanced input image, chroma compensation is conducted by adding the chroma values of the flare multiplied by the enhancement parameter, depending on the hue plane of the gamut boundary. Throughout the experiment, the proposed algorithm not only reproduces bright and colorful images in the mobile display under daylight conditions, but also produces a solution to improve sunlight readability.
机译：与主要用于室内环境的平板显示器不同，诸如个人数字助理和蜂窝电话之类的移动显示器会遇到各种照明水平。特别地，在日光条件下，在移动显示器上显示的图像或文本可能被黑暗地感知，这导致移动显示器中的太阳可读性下降。为了克服这个问题，我们提出了一种具有亮度适应模型和眩光补偿的光照水平自适应色彩再现方法。亮度适应是一种根据光照水平移动光感受器响应曲线的生理机制。因此，随着移动电话从室内携带到室外环境，感光器响应曲线自动向较高的亮度移动以适应日光强度。因此，对于从移动显示器发射的较低强度，感光器响应曲线变得较不敏感，从而降低了所显示图像的感知亮度。而且，由移动显示器产生的颜色也可能受到耀斑的影响，该耀斑是指从显示面板反射的环境光，这会降低移动显示色域的最大色度。基于这些生理和物理现象，通过使通过器件特性估计的输入亮度值与根据亮度适应模型计算出的感光体响应值之间具有线性关系，可以增强输入图像的亮度值。对于亮度增强的输入图像的色度分量，根据色域边界的色相平面，通过将耀斑的色度值乘以增强参数来进行色度补偿。在整个实验过程中，提出的算法不仅可以在日光条件下在移动显示器中再现明亮多彩的图像，而且可以提供一种提高日光可读性的解决方案。

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