数字水印检测过程中图像的几何校正

Geometric Correction of Image on Digital Watermarking Detection

在数字水印技术中,针对含水印图像遭受几何攻击后的水印检测问题,提出了根据图像像素判断含水印图像遭受的几何攻击类型的方法。在水印检测时,先对遭受几何攻击的含水印图像进行校正。该方法可以快速校正经旋转、平移、缩放、剪切等几何攻击的图像,并且计算量小,为进一步检测水印提供了有力的保障。

For the detection of digital watermarking from the image geometric attacked,a method estimated the type of geometric attacks from the watermarked image according to image pixel is proposed.During the watermark detection,the image suffered from geometric attacks is firstly corrected.The method can correct rotation,translation,scaling and cropping of a watermark image quickly with little calculated amount which provides a powerful guarantee for further watermark detection.