It has been tested that this algorithm can successfully resist geometric distortion 实验证明该算法对几何形变具有很好的顽健性。
2.
In the mean time , some experiments have been made to investigate the effect of the watermark , and die results confirmed its good concealment and excellent robustness 通过对水印图象的顽健性的一系列实验分析，其结果表明嵌入的水印具有较好的顽健性和隐蔽性。
3.
The experimental results and attack analysis show that the watermark algorithm is transparent and robust against some image processing operations , such as jpeg lossy compression , median filtering , additive noise , scaling , and incorporating attacks 实验结论和攻击测试表明，本文所提议的算法具有较好的透明性，对如jpeg有损压缩、中值滤波、附加噪声、伸缩、裁剪等各种图像处理的攻击有较强的顽健性。
4.
The innovative idea of the method is in that the analytic ability for high - frequency signals of wavelet packet is used to enhance information capacity . because the human vision is insensitive to high - frequency signals , one can make information of watermark mass and hightensile in the high - frequency domain . in this way , not only the quality of original image can be reserved , but also the robustness of the watermark improved 其创新点就在于利用小波包对高频信号进一步分解的能力，极大地拓展了信息嵌入的空间，由于人眼视觉对高频信号的不敏感性，可以以较大的强度在高频部分嵌入水印，这样不但可以保证原图质量，而且可以进?步提高水印的顽健性。
