摘要
以灰度图像作为水印嵌入．比一般的以随机序列串嵌入的水印算法更具有直观性。对灰度图像进行位平面编码,截取高几位的值作为水印数据嵌入图像,从而达到压缩水印数据的目的。同时提出,在小波域嵌入水印时只修改对应位水印数据为1的小波系数,以减少对原始图像的视觉破坏。并将水印嵌入重要系数中,平衡水印的鲁棒性和不可见性。仿真实验验证了算法能够抵抗多种攻击。
The author of this paper proposed a watermark algorithm by using gray-level image to substute watermark,that would be more audio-visual compared with the general watermark algorithm embedded with random serials. Encode gray-level image with bit-plane coding, and intercept the higher bit values as watermark data to embed into original image. So the watermark data can be compressed. And proposed that when embed watermark in wavelet domain, that merely modify the wavelet coefficient whose corresponding bit data of watermark is 1, it can reduce the vision breaking on original image and by embed watermark into significant coefficient. Moreover it balanced the robustness and invisibility of water mark. And the emulational experiment verified that it can resist many generic attacks.
出处
《重庆师范大学学报（自然科学版）》
CAS
2006年第2期50-53,共4页
Journal of Chongqing Normal University:Natural Science
关键词
小波变换
位平面编码
灰度水印
wavelet transform
bit-plane encoding
gray-level watermark
