激光与光电子学进展, 2018, 55 (5): 051003, 网络出版: 2018-09-11   

基于频率约束的相机与屏幕通信隐写算法 下载: 1308次

Screen-Camera Communication Steganography Based on Frequency Constraint
作者单位
天津大学电气自动化与信息工程学院, 天津 300072
摘要
移动设备的快速普及,催生了一系列新的信息获取方式,其中,最具代表性的是已广泛应用于移动支付领域的二维码技术,它实现了二维码屏幕显示到相机拍照识别获取的新型通信。基于这种新的通信方式,引入信息隐藏技术构建不可见的二维码信息,使用户在获取信息的同时,减少由于引入可见二维码而带来的对载体信息感观的不良影响。该算法针对数字视频资源,利用频率约束方法将特定信息嵌入到载体之中,通过相机或手机在视频屏幕播放时进行拍摄,获取视频信息后提取隐藏信息,实现特定信息的有效传递。同时,算法引入能量统计模型和纠错机制,以保证提取信息的准确性。大量实验测试显示,该算法能够在1~2 m距离下获得较高的信息提取准确率。
Abstract
The series of new information acquisition methods are spawned with the rapid popularization of mobile devices. The most representative one is the two-dimensional code technology, which is widely used in the field of mobile payment. It implements a new type of communication method, in which two-dimensional code is displayed on the screen and recognized by camera. We introduce an information hiding technology to build invisible two-dimensional code information based on this new mode of communication, so that the users can obtain information while reducing the information perception of adverse effects from the introduction of visible two-dimensional code to the carrier. According to the digital video resources, the proposed algorithm embeds the specific information into the carrier by frequency constraint method, and takes pictures when the camera or mobile phone is played on the video screen. After the video information is obtained, the hidden information is extracted to achieve the effective transmission of the specific information. At the same time, the energy statistics model and error correction mechanism are introduced to ensure the accuracy of the extracted information. A large number of experimental tests show that the algorithm can achieve high accuracy of information extraction within 1-2 m distance.

褚晶辉, 田叶, 苏育挺. 基于频率约束的相机与屏幕通信隐写算法[J]. 激光与光电子学进展, 2018, 55(5): 051003. Jinghui Chu, Ye Tian, Yuting Su. Screen-Camera Communication Steganography Based on Frequency Constraint[J]. Laser & Optoelectronics Progress, 2018, 55(5): 051003.

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