【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。更多还原

【Abstract】 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 security of watermarking image has been further improved.更多还原