Development of data embedding and extracting methods for printed images with scalability and flexibility

在本研究中，我们开发了新的使用移动的终端的数据嵌入和提取算法。提出了用于快速估计失真系数的图像校正方法和用于增加嵌入数据的容量的分组编码方法。通过这些方法，可以嵌入大约20个字符的字母和特殊字符。在检测率上，对于移动的手机中摄像头拍摄的图像，可以达到90%以上。研究了使用图像也可以自由改变的显示设备的数据提取技术的可行性。

In this research, we have developed new data embedding and extracting algorithm using mobile terminals. The image correction method for high-speed estimation of distortion coefficients and the group coding method for increasing the capacity of embedding the data have been proposed. By these methods, about 20 characters for alphabets and special characters can be embedded. In the detection rate, over 90 % can be achieved for the images captured by the camera in mobile phones. The feasibility study for the data extraction technique using display devices in which the image can also be freely changed has been investigated.