CAJ | 학술논문

提出了一种基于四叉树结构的复合型水印算法,主要利用小波变换的空间频率分解特性,用四叉树结构表示相应的小波系数,并结合树结点上的统计信息来选择嵌入水印的位置.实验结果证明,该算法适合于医学图像,能够检测图像是否被篡改,实现水印的盲提取,并且可无损恢复原始图像.
제출료일충기우사차수결구적복합형수인산법,주요이용소파변환적공간빈솔분해특성,용사차수결구표시상응적소파계수,병결합수결점상적통계신식래선택감입수인적위치.실험결과증명,해산법괄합우의학도상,능구검측도상시부피찬개,실현수인적맹제취,병차가무손회복원시도상.
The authors of this paper present a watermarking scheme based on the quadtrees.It mainly uses the characteristics of wavelet decomposition in the spatial-frequency domain,the quadtrees structures received by the wavelet decomposition,and statistical information on the nodes to choose the locations where to embed the watermarks.The results show that the algorithm is suitable for medical images,and watermarks can not only be extracted blindly and detect the distorted location of images,but also fully restore the original image.