Invisible and Readable Checkerboard as Watermark With Temporally Brightness Modulation
Invisible and Readable Checkerboard as Watermark With Temporally Brightness Modulation
复制标题
不可见且可读的棋盘作为水印，具有时间亮度调制
DOI：
10.1109/tia.2022.3195972
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发表时间：
2022
影响因子：
4.4
通讯作者：
Uehira Kazutake
中科院分区：
文献类型：
--
作者：
Unno Hiroshi;Uehira Kazutake
这篇文章描述了不可见性和可读性方面的基本单位的信息，是附加到一个显示的图像，通过使用我们提出的方法。所提出的方法使我们能够无形地附加信息到平板显示器（FPD）上的显示图像，并从显示图像的捕获视频图像中提取信息。通过使用时间和空间亮度调制，将信息附加到显示图像的单色分量。这些信息在显示图像的给定矩形区域内排列为黑白白色棋盘图案。使用棋盘图案是因为它是具有高密度的t2-D图案的典型示例。棋盘图案由边长相同的正方形组成。L被改变以检查信息基本单元大小的不可见性和可读性。首先，我们评估了附着在FPD上显示图像上的信息对人眼的不可见性。实验结果表明，当显示图像的帧速率为60 fps时，对于所有L，不可见度为90%或更高。也就是说，不可见性与L无关。我们还检查了附加信息的视频摄像机的可读性。实验结果表明，满足可读性的L的下限值。
This aticle describes invisibility and readability in terms of the size of the basic unit of information that was attached to a displayed image by using our proposed method. The proposed method enables us to invisibly attach information to a displayed image on a flat panel display (FPD) and to extract the information from a captured video image of the displayed image. The information was attached to a single-color component of the displayed image by using temporal and spatial brightness modulation. The information was arranged within a given rectangular area of the displayed image as a black-and-white checkerboard pattern. The checkerboard pattern was used because it is a typical example of a t2-D pattern with a high density. The checkerboard pattern consists of squares having the same side lengthL.Lwas changed to examine the invisibility and readability in terms of the size of the basic unit of information. First, we assessed invisibility to the human eye of the information attached to the displayed image on the FPD. The experimental results showed that the degree of invisibility was 90% or over for allLwhen a frame rate for the displayed image was 60 fps. That is, the invisibility is independent ofL. We also examined readability of the attached information for a video camera. The experimental results showed a lower limit value ofLthat satisfied the readability.