摘要
将离散小波变换(DWT)和离散多小波变换(DMWT)方法用于子带抽样图像水印技术中,并对其性能和采用离散余弦变换(DCT)方法的性能进行了对比分析。仿真结果表明,在DWT和DMWT两个变换域嵌入水印后能获得较好的图像质量。在DMWT域嵌入水印有较DCT和DWT域更好的图像质量效果和更好的抵抗通常图像处理攻击的能力。
Use of discrete wavelet transform（DWT） and discrete multi-wavelet transform（DMWT） for sampling based on sub-band image watermarking technology,its performance and use of discrete cosine transform（DCT） method performance are compared and analyzed in this paper.Simulation results show that the DWT and DMWT two transform domain watermarked can get better image quality.The DMWT domain watermarked DCT and DWT domains have more and better image quality results and better resistance to usual image processing attacks.
出处
《天津工程师范学院学报》
2009年第4期19-22,共4页
Journal of Tianji University of Technology and Education
关键词
图像水印
多小波
鲁棒性
image watermarking
multi-wavelet
robustness
