摘要
根据等高线数据的特点,提出了一种抗压缩的等高线数据盲水印算法。首先采用逐点前进法对等高线数据进行数据压缩,提取特征点,然后基于量化思想将水印信息嵌入在特征点的小数部分。实验结果表明,该算法具有较好的抗压缩效果。
According to characteristics of contour data, a blind watermark algorithm of anti - compression for contour data is proposed. First, contour lines are compressed; then the watermarking is embedded in the decimal parts of the coordinates of the compressed ver- tex data. The experiments conducted on watermarking with different compression degrees show that the algorithm is robust.
出处
《测绘与空间地理信息》
2013年第12期31-33,共3页
Geomatics & Spatial Information Technology
基金
国家科技支撑计划项目"数字流域关键技术"(2013BAB05B01)资助
关键词
等高线数据
抗压缩
盲水印
contour data
anti - compression
blind watermarking