CAJ | 학술논문

对数字水印算法现状进行研究，提出一种基于通信技术的DCT中频域的自适应数字水印算法。综合通信技术中的扩频技术和交织技术，采用纹理掩蔽性技术，以灰度图像为载体，以二值图像为水印，对水印进行直接序列扩频和交织编码置乱；根据载体图像的纹理特性求得嵌入强度，选择DCT变换域的中频系数进行水印自适应嵌入，检测过程运用密钥实现水印的盲提取。攻击测试结果表明，该算法兼顾了数字水印的隐蔽性和鲁棒性，普遍适用于秘密信息传递、电子商务等实际应用中。
대수자수인산법현상진행연구，제출일충기우통신기술적DCT중빈역적자괄응수자수인산법。종합통신기술중적확빈기술화교직기술，채용문리엄폐성기술，이회도도상위재체，이이치도상위수인，대수인진행직접서렬확빈화교직편마치란；근거재체도상적문리특성구득감입강도，선택DCT변환역적중빈계수진행수인자괄응감입，검측과정운용밀약실현수인적맹제취。공격측시결과표명，해산법겸고료수자수인적은폐성화로봉성，보편괄용우비밀신식전체、전자상무등실제응용중。
In view of research situation of digital watermarking,an adaptive digital watermarking algorithm based on communica-tion technology of DCT intermediate frequency domain was presented.The technology of spectrum spreading,interleaving and texture masking were used.The carrier image was a gray scale image and the watermarking was a binary image.Direct sequence spread spectrum was used in watermarking and the watermarking was scrambled by interleaving technology.The embedding strength was got according to the texture feature of the carrier image.The watermarking was embedded into the intermediate frequency coefficient of the DCT domain.Finally,the detection process which used key realized the blind extraction.Experimen-tal results show that the algorithm takes both imperceptibility and robustness into account,thus,it has the practical application of universality and applicability.