CAJ | 학술논문

利用图像经过CARDBAL平衡多小波变换(BMWT)后,能量汇聚且平均分摊在最低分辨率子图像4个分量上的特点,提出了一种基于BMWT和DCT的改进的盲水印算法.在彩色图像的饱和度分量上嵌入一幅二值水印图像,水印嵌入前进行Arnold置乱和混沌加密预处理,保证了算法的安全性.实验结果表明,改进后的算法具有良好的鲁棒性,而且在抵抗JPEG压缩性能方面有明显的提高.
이용도상경과CARDBAL평형다소파변환(BMWT)후,능량회취차평균분탄재최저분변솔자도상4개분량상적특점,제출료일충기우BMWT화DCT적개진적맹수인산법.재채색도상적포화도분량상감입일폭이치수인도상,수인감입전진행Arnold치란화혼돈가밀예처리,보증료산법적안전성.실험결과표명,개진후적산법구유량호적로봉성,이차재저항JPEG압축성능방면유명현적제고.
Taking advantage of the feature that the energy of an image would gather and spread averagely on four components in the sub-image of the lowest resolution, an improved blind watermarking algorithm is proposed based on BMWT and DCT. The binary watermark images is embedded into the saturation component of a color image. The watermark is pre-processed with Arnold scrambling and chaotic encryption technique before embedded into the cover image, thus ensure the security of the algorithm. Ex-periments show that the improved algorithm not only has good robustness, but also significantly improve the performance in resist to JPEG compression.