HiLight: Hiding Bits in Pixel Translucency Changes
HiLight: Hiding Bits in Pixel Translucency Changes
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HiLight：隐藏像素半透明度变化中的位
DOI：
10.1145/2721896.2721910
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Xia Zhou
中科院分区：
文献类型：
--
作者：
Tianxing Li;Chuankai An;Andrew T. Campbell;Xia Zhou
我们介绍了Hilight，这是一种用于脱机智能设备的不引人注目的屏幕-相机通信的新形式。Hilight隐藏了LED或OLED屏幕上显示的任何图像下的信息，配备摄像头的智能设备可以通过将摄像头转向屏幕来获取信息。Hilight通过利用透明度(Alpha)通道(计算机图形学中的一个众所周知的概念)来实现这一点，以将位编码为像素半透明度更改，而无需修改像素颜色(RGB)值。我们演示了Hilight使用智能手机的可行性。通过在屏幕和摄像头之间提供低调、灵活和轻量级的通信渠道，Hilight允许出现新的人机界面和情景感知应用程序。
We present HiLight, a new form of unobtrusive screen-camera communication for off-theshelf smart devices. HiLight hides information underlying any images shown on an LED or OLED screen, and camera-equipped smart devices can fetch the information by turning their cameras to the screen. HiLight achieves this by leveraging the transparency (alpha) channel, a well-known concept in computer graphics, to encode bits into pixel translucency changes without modifying pixel color (RGB) values. We demonstrated HiLight's feasibility using smartphones. By offering an unobtrusive, flexible, and lightweight communication channel between screens and cameras, HiLight allows new HCI and context-aware applications to emerge.