CAJ | 학술논문

针对SAR数据提出一种参考秘密信息内容对载体像素对匹配的大容量信息隐藏方法。该方法利用提取函数将SAR数据实部和虚部的不同组合结果映射为一位n2进制信息,并通过不同组合结果的优选使含密SAR数据与原载体数据的 MSE 最小,保证 SAR 原始数据成像质量几乎不受影响。实验对比结果证明：与同类隐藏方法相比,在信息嵌入量相同时,该隐藏算法PSNR平均提高0.7 dB,且像素对组合模式可以作为密钥用于接收端信息提取,利用载体的不同组合方法可以有效提高算法的安全性。
침대SAR수거제출일충삼고비밀신식내용대재체상소대필배적대용량신식은장방법。해방법이용제취함수장SAR수거실부화허부적불동조합결과영사위일위n2진제신식,병통과불동조합결과적우선사함밀SAR수거여원재체수거적 MSE 최소,보증 SAR 원시수거성상질량궤호불수영향。실험대비결과증명：여동류은장방법상비,재신식감입량상동시,해은장산법PSNR평균제고0.7 dB,차상소대조합모식가이작위밀약용우접수단신식제취,이용재체적불동조합방법가이유효제고산법적안전성。
Aimed at SAR raw data,this paper proposes a high capacity information hiding algorithm based on pixel pair matching conducted according to the secret data.By using an extraction function,different combination of SAR real part and imaginary part are mapped into a secret digit in an n2??ary notation sys-tem,and the optimal combination is chosen for a data block with the smallest MSE.Thus,the distortion caused by information hiding can be ignored for SAR imaging.Compared with the other similar algo-rithms,the PSNR of the proposed method increases 0.7 dB on average under condition of the same capaci-ty,and high security is achieved with the help of various combinations.