CAJ | 학술논문

随着计算机和网络的飞速发展，流通信息的版权保护问题越来越受到人们的重视，数字水印作为一种有效的版权保护方法已经得到了广泛的应用．本文提出了一种基于小波中频和DCT相结合的彩色盲水印算法，首先将彩色图像由RGB彩色空间转换至13YCbCr彩色空间，弄13用其良好的空阃独立性，基于人眼视觉掩蔽效应选择嵌入位置，然后分别通过将原图像DWT中频系数作分块DCT变换，嵌入水印．实验结果表明，嵌入算法容易实现，且该水印算法具有很好的不可见性，并对剪切和JPEG压缩等图像操作都有很好的鲁棒性．
수착계산궤화망락적비속발전，류통신식적판권보호문제월래월수도인문적중시，수자수인작위일충유효적판권보호방법이경득도료엄범적응용．본문제출료일충기우소파중빈화DCT상결합적채색맹수인산법，수선장채색도상유RGB채색공간전환지13YCbCr채색공간，롱13용기량호적공곤독립성，기우인안시각엄폐효응선택감입위치，연후분별통과장원도상DWT중빈계수작분괴DCT변환，감입수인．실험결과표명，감입산법용역실현，차해수인산법구유흔호적불가견성，병대전절화JPEG압축등도상조작도유흔호적로봉성．
A blind watermarking algorithm for digital image based on DCT and DWT is proposed. First, the original image is transformed from the RGB color space into the YCbCr color space, which has the excel- lent independence of every channel, then the watermark is embedded into all three color spaces. Secondly, the watermark embedding position was chosen by human visual system （ HVS）, and the embedding of water- marking is achieved by the algorithm of image watermark technique on DCT and DWT, and the capacity of embedding depends on human visual system. The experimental result indicates that the algorithm is visually imperceptible and robust to general image processing.