CAJ | 학술논문

提出了一种适合于二值栅格地理数据版权保护的数字水印算法。首先，对二值栅格地理数据及其水印特征进行分析；在此基础上，引入游程长度编码思想，对二值栅格地理数据进行游程长度编码；最后，结合人类视觉系统特征，通过修改游程长度奇偶性的方式，将有意义的水印信息嵌入到二值栅格地理数据中。实验结果表明，所提出的算法能较好地保持二值栅格地理数据的视觉特征，有效地解决了目前所存在的二值栅格地理数据水印嵌入难、水印容量低等问题，且对压缩、加噪、裁剪等水印攻击具有较好的鲁棒性。
제출료일충괄합우이치책격지리수거판권보호적수자수인산법。수선，대이치책격지리수거급기수인특정진행분석；재차기출상，인입유정장도편마사상，대이치책격지리수거진행유정장도편마；최후，결합인류시각계통특정，통과수개유정장도기우성적방식，장유의의적수인신식감입도이치책격지리수거중。실험결과표명，소제출적산법능교호지보지이치책격지리수거적시각특정，유효지해결료목전소존재적이치책격지리수거수인감입난、수인용량저등문제，차대압축、가조、재전등수인공격구유교호적로봉성。
A digital watermarking algorithm was proposed to protect the copyright of binary raster geographic data .First the binary ras-ter geographic data and watermark features were analysed , then the binary raster geographic data was encoded by introducing the idea of Run-Length Encoding ( RLE) .Finally combined with the characteristics of human visual system , the meaning watermark informa-tion was embedded in the binary raster geographic data by modifying the run length of the encoded data .Experimental results showed that the proposed algorithm can effectively guarantee the visualization quality and solve the problems of the difficulty embedding and the low capacity of current binary raster geographic data watermarking algorithms , the proposed algorithm had good robustness to the image intensity attack such as compression , noise, cutting and so on.