基于几何变换特征集的水印图像失真校正算法

A Geometric Distortions Correction Arithmetic Based on Similar Character Complex for Image Digital Watermarking

提出了一种基于几何变换特征集的水印图像几何失真校正算法,采用水印图像攻击前与攻击后的几何变化特征集对水印图像几何失真进行失真校正,算法不但可以校正水印图像的旋转失真和缩放失真,还可校正联合失真。实验证明,算法性能稳定、校正精度高、可以有效地校正大强度几何失真。

A novel geometric distortions correction schema based on similar character complex for digital watermarking image is proposed,the arithmetic takes the advantage of the Geometric change complex of the image firstly to acquire geometric distortions correction,and it can not only correct scaling distortion and rotation distortion but also correct the combine distortions.The experiments have demonstrated that this schema has stable performance,sound correction precision,and can correct high intensity geometric distortions.