摘要
针对传统的字符编码没有容错功能的缺陷,文章提出了基于快速反应(QR)码的矢量空间数据盲水印算法。该方法对要嵌入的字符应用QR码编码,生成QR码二值图像,并应用Logistic混沌系统对该QR码图像进行混沌置乱,对处理后的水印图像按位嵌入矢量空间数据的空域部分,水印被多次嵌入。实验结果表明,该方法不仅能够在裁剪后的部分数据中解码出字符,而且具有很好的不可见性,水印嵌入引起的矢量空间数据的误差很小,水印算法对常见的多种攻击具有较好的鲁棒性。
Aiming at the defects of lacking of fault tolerance of traditional encoding for characters, the paper proposed a QR-based blind watermarking algorithm for vector geospatial data. characters that will be embedded were encoded to generate the QR watermarking image using the QR coding method and the logistic Chaotic System was used to suffer the watermarking image before embedding, then the bits of wa- termark were embedded in the space domain according to the coordinates of the points the watermark was embedded multiple times. Experimental result showed that not only the method could decode the characters in the part of the data after the crop with good invisibility, but also the spatial accuracy of the watermarked data would be acceptable, moreover, the algorithm would be robust to a variety of common attacks.
出处
《测绘科学》
CSCD
北大核心
2015年第5期132-135,共4页
Science of Surveying and Mapping
基金
国家自然科学基金项目(41371435
41404050)
国家科技支撑计划项目(2013BAB05B01)
甘肃省科技支撑计划项目(1304GKCA009)
甘肃省自然基金项目(148RJZA041)
甘肃省财政厅基本科研业务费项目(214146)
关键词
QR码
矢量空间数据
盲水印
版权保护
QR codes
vector geospatial data
blind watermarking
copyright protection
