摘要
灰度级水印图像,因信息量大而影响嵌入质量与稳定性。提出一种基于多级小波变换新的嵌入策略,使得嵌入灰度级水印图像的数据量更少,水印稳定性更强,并且具有良好的抗剪切、擦除、噪音、滤波与JPEG压缩失真的能力。在嵌入过程中,采用公钥密码体制加密,使得水印安全性得到进一步提高。
Gray level digital image watermarking affects the embedding quality and stability due to too much information. In this paper it proposes a new embedding strategy based on multi-level wavelet transform ,which makes the gray level watermarking image embedded has less information and stronger robustness, and with better capability against shearing, abrasion, noise, wave filtering as well as distortion under JPEG compression. Public-Key System is adopted in the process of embedding, so the seeurity of watermarking image has been further improved.
出处
《计算机应用与软件》
CSCD
2009年第3期38-40,共3页
Computer Applications and Software
基金
国家自然科学基金项目(70361002)
关键词
小波变换
灰度级水印
公钥密码体制
Wavelet transform Gray level digital image watermarking Public-key system
