Sharpening the watermarked image with Laplacian before detecting could make the watermarking scheme more robust to attacks and get better detecting result.

• 为了进一步提高该水印算法的鲁棒性和改善检测结果,在水印检测前使用拉普拉斯算子对图像进行锐化处理,使得所嵌入水印能抗击更多攻击种类,并使检测结果更清晰。