公开(公告)号：US20010002931A1

公开(公告)日：2001-06-07

申请号：US09765681

申请日：2001-01-19

Applicant: U.S. PHILIPS CORPORATION

Inventor： Maurice J.J.J-B. Maes ,  Cornelis W.A.M. Van Overveld ,  Peter M.J. Rongen

IPC: G06K009/00

CPC classification number: H04N5/913 ,  G06T1/005 ,  G06T2201/0051 ,  G06T2201/0063 ,  H04N1/32203 ,  H04N1/32219 ,  H04N2005/91335

Abstract: A digital image signal is watermarked by locally changing geometric features of the image. The watermark consists of a pseudo-random, dense subset of image pixels, e.g., a pattern of lines (20). A number of significant image pixels (21,22,23), i.e., pixels which give the highest response to a predetermined processing operation, is determined and then moved (24) to the vicinity (null) of the line pattern. As a result of this nullwarpingnull, the majority of significant image pixels (21,22) is eventually located within the vicinity of the line pattern. At the receiver end, the most significant pixels of an input image are again determined. The image is a watermarked image if a statistically high percentage lies within the vicinity of the line pattern.

Abstract translation: 数字图像信号通过局部改变图像的几何特征来加水印。 水印由图像像素的伪随机密集子集（例如，线图案（20））组成。 确定许多有意义的图像像素（21,22,23），即对预定处理操作给出最高响应的像素，然后移动（24）到线图案的附近（delta）。 作为这种“翘曲”的结果，大多数重要图像像素（21,22）最终位于线图案附近。 在接收端，再次确定输入图像的最高有效像素。 如果统计学上高的百分比位于线条图案的附近，则图像是水印图像。