digital watermarking algorithm with robust for image cropping
一种对图像剪切具有鲁棒性的数字水印算法

In this paper, a new algorithm of image watermark embedding and detecting based on DCT transform is presented. This method is robust to common signal and geometric distortions such as image cropping, and the embedded watermark can be detected without resorting to the uncorrupted original image. Experimental results support these claims.